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       # ALPHA TELECOM, INC.
       
          UTA120
       
          Card Type              ISDN TA                                 
          Chip Set               Unidentified                            
          I/O Options            Power, ISDN BRI interface via RJ-45     
                                 connector, RJ-11 analog port (2),       
                                                                         
                                 ISDN U interface via RJ-11 connector,   
                                 9-pin data port                         
          ISDN Rate              128Kbps                                 
          ISDN Modulation        V.120, HDLC, PPP                        
          Protocol               
          Error                  Unidentified                            
          Correction/Compression 
          Data Bus               External                                
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |     Function      |   Label    |   Function    |   Label   |
          |------------------------------------------------------------|
          | Power                      |   CN1   | ISDN U        | CN5 |
          |                            |         | interface     |     |
          |                            |         | (RJ-11)       |     |
          |----------------------------+---------+---------------+-----|
          | Telephone line 1 (RJ-11)   |   CN2   | 9-pin serial  | CN6 |
          |                            |         | port          |     |
          |----------------------------+---------+---------------+-----|
          | Telephone line 2 (RJ-11)   |   CN3   | Power switch  | SW1 |
          |----------------------------+---------+---------------+-----|
          | ISDN BRI interface (RJ-45) |   CN4   |               |     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Setting               | Label |   Position   |
          |-------------------------------------+-------+--------------|
          | Remote configuration enabled        | SW1/1 |      On      |
          |-------------------------------------+-------+--------------|
          | Remote configuration disabled       | SW1/1 |     Off      |
          |-------------------------------------+-------+--------------|
          | Local loopback enabled              | SW1/2 |      On      |
          |-------------------------------------+-------+--------------|
          | Local loopback disabled             | SW1/2 |     Off      |
          |-------------------------------------+-------+--------------|
          | Factory configured - do not alter   | SW1/3 | Unidentified |
          |-------------------------------------+-------+--------------|
          | Factory configured - do not alter   | SW1/4 | Unidentified |
          |-------------------------------------+-------+--------------|
          | Factory configured - do not alter   | SW1/5 | Unidentified |
          |-------------------------------------+-------+--------------|
          | Forced software download enabled    | SW1/6 |      On      |
          |-------------------------------------+-------+--------------|
          | Forced software download disabled   | SW1/6 |     Off      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 S/T TERMINATION SELECTION                  |
          |------------------------------------------------------------|
          |           Setting           |     SW1/7     |    SW1/8     |
          |-----------------------------+---------------+--------------|
          | í 100Ohm resistance enabled |      On       |      On      |
          |-----------------------------+---------------+--------------|
          |     Resistance disabled     |      Off      |     Off      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  | Color  |  Status  |            Condition            |
          |------+--------+----------+---------------------------------|
          | PWR  | Green  |    On    |           Power is on           |
          |------+--------+----------+---------------------------------|
          | PWR  | Green  |   Off    |          Power is off           |
          |------+--------+----------+---------------------------------|
          | LNE  | Green  |    On    |       U interface active        |
          |------+--------+----------+---------------------------------|
          | LNE  |  Red   |    On    |      U interface inactive       |
          |------+--------+----------+---------------------------------|
          | TEL1 | Green  |    On    |  Analog connection is good on   |
          |      |        |          |        telephone line 1         |
          |------+--------+----------+---------------------------------|
          | TEL1 | Green  | Blinking |   Analog connection is being    |
          |      |        |          | established on telephone line 1 |
          |------+--------+----------+---------------------------------|
          | TEL1 | Green  |   Off    | Analog connection is broken on  |
          |      |        |          |        telephone line 1         |
          |------+--------+----------+---------------------------------|
          | TEL2 | Green  |    On    |  Analog connection is good on   |
          |      |        |          |        telephone line 2         |
          |------+--------+----------+---------------------------------|
          | TEL2 | Green  | Blinking |   Analog connection is being    |
          |      |        |          | established on telephone line 2 |
          |------+--------+----------+---------------------------------|
          | TEL2 | Green  |   Off    | Analog connection is broken on  |
          |      |        |          |        telephone line 2         |
          |------+--------+----------+---------------------------------|
          | DATA | Green  |    On    |  Network connection is good on  |
          |      |        |          |           B-channel 1           |
          |------+--------+----------+---------------------------------|
          | DATA | Green  | Blinking |   Network connection is being   |
          |      |        |          |   established on B-channel 1    |
          |------+--------+----------+---------------------------------|
          | DATA | Green  |   Off    | Network connection is broken on |
          |      |        |          |           B-channel 1           |
          |------+--------+----------+---------------------------------|
          | DATA |  Red   |    On    |  Network connection is good on  |
          |      |        |          |           B-channel 2           |
          |------+--------+----------+---------------------------------|
          | DATA |  Red   | Blinking |   Network connection is being   |
          |      |        |          |   established on B-channel 2    |
          |------+--------+----------+---------------------------------|
          | DATA |  Red   |   Off    | Network connection is broken on |
          |      |        |          |           B-channel 2           |
          |------+--------+----------+---------------------------------|
          |  TD  | Green  |    On    |   Modem is transmitting data    |
          |------+--------+----------+---------------------------------|
          |  TD  | Green  |   Off    | Modem is not transmitting data  |
          |------+--------+----------+---------------------------------|
          |  RD  | Green  |    On    |     Modem is receiving data     |
          |------+--------+----------+---------------------------------|
          |  RD  | Green  |   Off    |   Modem is not receiving data   |
          |------+--------+----------+---------------------------------|
          | DTR  | Green  |    On    |        Computer is ready        |
          |------+--------+----------+---------------------------------|
          | DTR  | Green  |   Off    |      Computer is not ready      |
          |------+--------+----------+---------------------------------|
          | TST  | Yellow |    On    |     TA is conducting a test     |
          |------+--------+----------+---------------------------------|
          | TST  | Yellow |   Off    |   TA is not conducting a test   |
          +------------------------------------------------------------+
       
          +---------------------------------------------------------+
          |                  SUPPORTED COMMAND SET                  |
          |---------------------------------------------------------|
          |                    Basic AT Commands                    |
          |---------------------------------------------------------|
          | AT, A/, ‘+++’                                           |
          |---------------------------------------------------------|
          | A, E, Q, V                                              |
          |---------------------------------------------------------|
          | &C, &Z                                                  |
          |---------------------------------------------------------|
          |                       S Registers                       |
          |---------------------------------------------------------|
          | S0, S1, S2, S3, S4                                      |
          |---------------------------------------------------------|
          |                                                         |
          |---------------------------------------------------------|
          | Note: See MHI Help File for full command documentation. |
          +---------------------------------------------------------+
       
                            PROPRIETARY AT COMMAND SET
       
          +------------------------------------------------------------+
          |                   CONFIGURATION PROFILES                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &V [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays active, stored, and system         |
          |              | configuration profiles and analog port      |
          |              | settings                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &V0      | Display active profile                      |
          |--------------+---------------------------------------------|
          |     &V1      | Display user profile 1                      |
          |--------------+---------------------------------------------|
          |     &V2      | Display user profile 2                      |
          |--------------+---------------------------------------------|
          |     &V3      | Display system parameters and analog port   |
          |              | settings                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DATA SET READY (DSR)                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects DSR options                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &S0      | DSR forced high                             |
          |--------------+---------------------------------------------|
          |     &S1      | DSR high only while modem is handshaking or |
          |              | connected                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DATA TERMINAL READY (DTR)                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem response to DTR               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &D0      | DTR override                                |
          |--------------+---------------------------------------------|
          |     &D1      | DTR toggle causes online command mode       |
          |--------------+---------------------------------------------|
          |    í &D2     | Normal DTR operations                       |
          |--------------+---------------------------------------------|
          |     &D3      | Resets on receipt of DTR                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DIAL                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D<#> [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Dials telephone number according to any     |
          |              | modifiers included in the string            |
          |--------------+---------------------------------------------|
          | Note:        | Any combination of modifiers can be used to |
          |              | produce the desired dial functions in       |
          |              | sequence.                                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      DL      | Re-dial last number                         |
          |--------------+---------------------------------------------|
          |     DS=n     | Dial stored telephone number n (0-3)        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  FACTORY DEFAULT PROFILE                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &F [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Sets values in active profile to values     |
          |              | found in the default profile                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &F0      | Load active profile the factory profile 0   |
          |--------------+---------------------------------------------|
          |     &F1      | Load active profile the factory profile 1   |
          |--------------+---------------------------------------------|
          |     &F2      | Load active profile the factory profile 2   |
          |--------------+---------------------------------------------|
          |     &F3      | Load active profile the factory profile 3   |
          |--------------+---------------------------------------------|
          |     &F5      | Load active profile the factory profile 5   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Kn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Enables flow control options                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &K0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |    í &K3     | RTS/CTS flow control enabled                |
          |--------------+---------------------------------------------|
          |     &K4      | XON/XOFF flow control enabled               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HOOK CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Hn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects whether the modem is on-hook or     |
          |              | off-hook                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      H0      | Modem commanded to go on-hook (hang-up)     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   LAST CALL INFORMATION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Reports last call information               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &L0      | Reports information of last call on data    |
          |              | port                                        |
          |--------------+---------------------------------------------|
          |     &L1      | Reports information of last call on         |
          |              | telephone line 1                            |
          |--------------+---------------------------------------------|
          |     &L2      | Reports information of last call on         |
          |              | telephone line 2                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          ON-LINE                           |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] On [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Controls on-line command (data              |
          |              | transmission) state options.                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      O0      | On-line command mode with no retraining     |
          |              | enabled                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     REPORT INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Reports maximum network rate                |
          |--------------+---------------------------------------------|
          |      I1      | Reports ROM checksum                        |
          |--------------+---------------------------------------------|
          |      I2      | Reserved                                    |
          |--------------+---------------------------------------------|
          |      I3      | Reports model ID and version number         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                RESTORE PROFILE ON POWER-UP                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Yn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Restores a selected profile into the active |
          |              | profile on power-up (hard reset)            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &Y1      | Restore profile 1 on power-up               |
          |--------------+---------------------------------------------|
          |     &Y2      | Restore profile 2 on power-up               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SELECT CALL PROGRESS RESULT CODES              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Xn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Enables selection of tone detection and     |
          |              | associated result code format options       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      X0      | CONNECT result codes are displayed in short |
          |              | form                                        |
          |--------------+---------------------------------------------|
          |     í X1     | CONNECT result codes are displayed in       |
          |              | complete form                               |
          |--------------+---------------------------------------------|
          |      X2      | VOICE and CONNECT result codes are          |
          |              | displayed in complete form                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         SOFT RESET                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Zn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Restores modem profiles previously saved in |
          |              | non-volatile RAM using the &W command.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      Z1      | Restore setting 1                           |
          |--------------+---------------------------------------------|
          |      Z2      | Restore setting 2                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STORE ACTIVE PROFILE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Wn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Writes the values for the active profile    |
          |              | into the non-volatile RAM                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &W1      | Write the active profile to stored profile  |
          |              | 1                                           |
          |--------------+---------------------------------------------|
          |     &W2      | Write the active profile to stored profile  |
          |              | 2                                           |
          +------------------------------------------------------------+
       
                             EXTENDED AT COMMAND SET
       
          +------------------------------------------------------------+
          |                    B-CHANNEL SELECTION                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %A3=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Determines which B-channel will be used for |
          |              | leased line connection                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í %A3=1    | B1 channel                                  |
          |--------------+---------------------------------------------|
          |    %A3=2     | B2 channel                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DATA FORWARDING CHARACTER                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %L3=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Defines specified characters as data        |
          |              | forwarding characters                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    %L3=0     | No data forwarding character selected       |
          |--------------+---------------------------------------------|
          |   í %L3=2    | Carriage return                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       DATA PROTOCOL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %A2=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Determines rate adaptation protocol on      |
          |              | B-channel. %A2? Displays protocol type      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    %A2=0     | HDLC transparent rate adaptation            |
          |--------------+---------------------------------------------|
          |    %A2=1     | Asynchronous-to-synchronous PPP protocol    |
          |--------------+---------------------------------------------|
          |    %A2=2     | Multi-link PPP                              |
          |--------------+---------------------------------------------|
          |    %A2=3     | Asynchronous inverse mux                    |
          |--------------+---------------------------------------------|
          |    %A2=5     | V.120                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      IDLE TIMER DELAY                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %L4 [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | x 50ms                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets time delay between characters received |
          |              | from DTE. %L4=0 disables data forwarding on |
          |              | time-out                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       NUMBERING PLAN                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %A0=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Determines rate adaptation protocol on      |
          |              | B-channel                                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í %A0=0    | Unknown                                     |
          |--------------+---------------------------------------------|
          |    %A0=1     | ISDN numbering plan selected                |
          +------------------------------------------------------------+
       
                                         
       
                                 SPECIAL COMMANDS
       
          +------------------------------------------------------------+
          |                   ANALOG PORT ATTRIBUTES                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !Bn=x[cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Sets analog port attributes. n selects      |
          |              | phone port, x selects attribute. !Bn=?      |
          |              | queries the attribute of selected port.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    !B1=0     | Telephone line 1 set to SPEECH              |
          |--------------+---------------------------------------------|
          |    !B1=1     | Telephone line 1 set to AUDIO               |
          |--------------+---------------------------------------------|
          |    !B2=0     | Telephone line 2 set to SPEECH              |
          |--------------+---------------------------------------------|
          |    !B2=1     | Telephone line 2 set to AUDIO               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         BANDWIDTH RELEASE ON A VOICE CALL REQUEST          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @M5=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables B-channel release during   |
          |              | an MP session when there is a voice call    |
          |              | request                                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    @M5=0     | Bandwidth release on voice call request     |
          |              | disabled                                    |
          |--------------+---------------------------------------------|
          |   í @M5=1    | Bandwidth release on voice call request     |
          |              | enabled                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CACH/EKTS                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !E0=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Disables/enables CACH/EKTS. !E0? queries    |
          |              | CACH/EKTS status                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    !E0=0     | CACH/EKTS disabled                          |
          |--------------+---------------------------------------------|
          |    !E0=1     | CACH/EKTS enabled                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CHAP ENCRYPTION                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @M3=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables CHAP password encryption   |
          |              | protocol                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í @M3=0    | CHAP password encryption protocol disabled  |
          |--------------+---------------------------------------------|
          |    @M3=1     | CHAP password encryption protocol enabled   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DATA SPID                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !Cn=x [SPID#]                     |
          |--------------+---------------------------------------------|
          | Description: | Specifies port and data service profile     |
          |              | identifier assigned by the ISDN provider.   |
          |              | Cn? queries setting                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     !C0      | Sets switch type                            |
          |--------------+---------------------------------------------|
          |     !C6      | Sets SPID of data port 1                    |
          |--------------+---------------------------------------------|
          |     !C7      | Sets SPID of data port 2                    |
          |--------------+---------------------------------------------|
          |     !C8      | Sets SPID of telephone line 1               |
          |--------------+---------------------------------------------|
          |     !C9      | Sets SPID of telephone line 2               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FEATURE KEYS                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !F0=nx [cmds]                     |
          |--------------+---------------------------------------------|
          | Range:       | n=0 - 255                                   |
          |--------------+---------------------------------------------|
          | Description: | Programs feature keys. !F0? queries feature |
          |              | keys                                        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    !F0=n1    | Sets value for Conference Feature Key.      |
          |              | Default value is 60                         |
          |--------------+---------------------------------------------|
          |    !F0=n2    | Sets value for Transfer Feature Key.        |
          |              | Default value is 61                         |
          |--------------+---------------------------------------------|
          |    !F0=n3    | Sets value for Drop Feature Key. Default    |
          |              | value is 62                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        PERSIST TIME                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @M9=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 5sec                                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the persist time to add or drop a      |
          |              | second B-channel                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SCREEN INCOMING CALLS                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !Rn=x [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Screens incoming calls for different ports  |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |      n=0       | Data port call screening                  |
          |----------------+-------------------------------------------|
          |      n=1       | Analog telephone 1 call screening         |
          |----------------+-------------------------------------------|
          |      n=2       | Analog telephone 2 call screening         |
          |----------------+-------------------------------------------|
          |     í x=0      | All calls accepted on selected port       |
          |----------------+-------------------------------------------|
          |      x=1       | All calls rejected on selected port       |
          |----------------+-------------------------------------------|
          |      x=2       | Calls listed in the stored phone          |
          |                | directory are accepted on selected port   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   STORE DIRECTORY NUMBER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !Nx=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range (n):   | 0 - 24                                      |
          |--------------+---------------------------------------------|
          | Unit (n):    | 0 - 9, *, #                                 |
          |--------------+---------------------------------------------|
          | Description: | Store the directory number (n) for the port |
          |              | (x). !N? queries the stored directory       |
          |              | numbers                                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    !N0=n     | Store the self directory number of data     |
          |              | port 1                                      |
          |--------------+---------------------------------------------|
          |    !N1=n     | Store the self directory number of analog   |
          |              | telephone port 1                            |
          |--------------+---------------------------------------------|
          |    !N2=n     | Store the self directory number of analog   |
          |              | telephone port 2                            |
          |--------------+---------------------------------------------|
          |    !N3=n     | Store the self directory number of data     |
          |              | port 2                                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        SWITCH TYPE                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] !C0=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects network switch type.                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    !C0=1     | AT&T 5ESS                                   |
          |--------------+---------------------------------------------|
          |    !C0=2     | AT&T or Siemens N1-1                        |
          |--------------+---------------------------------------------|
          |    !C0=3     | Northern Telecom DMS-100                    |
          |--------------+---------------------------------------------|
          |    !C0=4     | Northern Telecom NI-1                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        THROUGHPUT THRESHOLD TO ADD A SECOND CHANNEL        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @M6=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-64                                        |
          |--------------+---------------------------------------------|
          | Unit:        | Kbits/sec                                   |
          |--------------+---------------------------------------------|
          | Description: | Defines the throughput threshold to add a   |
          |              | second channel.                             |
          |--------------+---------------------------------------------|
          | Note:        | If the throughput is under the threshold    |
          |              | for a time defined by @M9 the B-channel     |
          |              | will be released. If the throughput is      |
          |              | above the threshold, a second call will be  |
          |              | established and the TA will attempt to bind |
          |              | the two B-channels together.                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |      THROUGHPUT THRESHOLD TO RELEASE A SECOND CHANNEL      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @M8=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-64                                        |
          |--------------+---------------------------------------------|
          | Unit:        | Kbits/sec                                   |
          |--------------+---------------------------------------------|
          | Description: | Defines the throughput threshold to release |
          |              | a second channel. Persist time defined by   |
          |              | @M9                                         |
          +------------------------------------------------------------+
       
                               S(status) REGISTERS
       
          +------------------------------------------------------------+
          |                    BACKSPACE CHARACTER                     |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S5=n [cmds]                       |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Selects a character used for backspace <BS> |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    NO CARRIER TIME-OUT                     |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S7=n [cmds]                       |
          |--------------+---------------------------------------------|
          | Range:       | 1-50                                        |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Maximum wait time the modem uses after      |
          |              | dialing to detect a carrier signal from the |
          |              | remote modem for both originating and       |
          |              | answering calls.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 ESCAPE SEQUENCE GUARD TIME                 |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S12=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 10                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | .1sec                                       |
          |--------------+---------------------------------------------|
          | Description: | Maximum allowable time between escape       |
          |              | character sequence initiation and           |
          |              | completion for the escape sequence to be    |
          |              | executed. A value of 0 disables guard time. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DTR CHANGE THRESHOLD                    |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S25=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 2                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | .2 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets maximum time a change in the DTR       |
          |              | signal will be ignored                      |
          +------------------------------------------------------------+