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# FARALLON COMPUTING, INC.
NETOPIA ISDN MODEM
Card Type ISDN TA
Chipset Unidentified
Error Correction/Compression STAC LZS
ISDN Transfer Rate 56Kbps x 2/64Kbps x 2
ISDN Protocol V.120, PPP
Switch Type 5ESS, DMS100, EWSD, NI-1
Data Bus Serial
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------+-------+---------------------+-------|
| ISDN U interface | CN1 | Analog line 1 in | CN4 |
|----------------------+-------+---------------------+-------|
| Serial port | CN2 | DC power in | CN5 |
|----------------------+-------+---------------------+-------|
| Analog line 2 in | CN3 | Reset switch | SW1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+-------+----------+----------------------------------|
| LED1 | Green | On | Power is on |
|------+-------+----------+----------------------------------|
| LED1 | Green | Off | Power is off |
|------+-------+----------+----------------------------------|
| LED2 | Green | On | TA failed last test |
|------+-------+----------+----------------------------------|
| LED2 | Green | Blinking | TA is performing test |
|------+-------+----------+----------------------------------|
| LED2 | Green | Off | TA passed last test |
|------+-------+----------+----------------------------------|
| LED3 | Green | On | ISDN is disconnected or not |
| | | | synchronized |
|------+-------+----------+----------------------------------|
| LED3 | Green | Blinking | ISDN is synchronized but |
| | | | signaling procedures not |
| | | | established |
|------+-------+----------+----------------------------------|
| LED3 | Green | Off | ISDN is fully connected |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (CON'T) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------+----------+---------------------------------|
| LED4 | Green | On | ISDN B1 channel connected in |
| | | | data mode |
|------+--------+----------+---------------------------------|
| LED4 | Green | Blinking | ISDN B1 channel placing data |
| | | | mode call |
|------+--------+----------+---------------------------------|
| LED4 | Yellow | On | ISDN B1 channel connected in |
| | | | voice mode |
|------+--------+----------+---------------------------------|
| LED4 | Yellow | Blinking | ISDN B1 channel placing voice |
| | | | mode call |
|------+--------+----------+---------------------------------|
| LED4 | N/A | Off | ISDN B1 channel not connected |
|------+--------+----------+---------------------------------|
| LED5 | Green | On | ISDN B2 channel connected in |
| | | | data mode |
|------+--------+----------+---------------------------------|
| LED5 | Green | Blinking | ISDN B2 channel placing data |
| | | | mode call |
|------+--------+----------+---------------------------------|
| LED5 | Yellow | On | ISDN B2 channel connected in |
| | | | voice mode |
|------+--------+----------+---------------------------------|
| LED5 | Yellow | Blinking | ISDN B2 channel placing voice |
| | | | mode call |
|------+--------+----------+---------------------------------|
| LED5 | N/A | Off | ISDN B2 channel not connected |
|------+--------+----------+---------------------------------|
| LED6 | Green | On | TA is transmitting data |
|------+--------+----------+---------------------------------|
| LED6 | Green | Off | TA is not transmitting data |
|------+--------+----------+---------------------------------|
| LED7 | Green | On | TA is receiving data |
|------+--------+----------+---------------------------------|
| LED7 | Green | Off | TA is not receiving data |
|------+--------+----------+---------------------------------|
| LED8 | Green | On | DTR signal is high |
|------+--------+----------+---------------------------------|
| LED8 | Green | Off | DTR signal is low |
+------------------------------------------------------------+
+--------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|--------------------------------------------------------|
| Basic AT Commands |
|--------------------------------------------------------|
| +++, A/ |
|--------------------------------------------------------|
| A, E, H, O, V, Z |
|--------------------------------------------------------|
| &C, &F, &W |
|--------------------------------------------------------|
| Extended AT Commands |
|--------------------------------------------------------|
| \Q, \T |
|--------------------------------------------------------|
| Note: See MHI help file for complete information. |
+--------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| ANALOG ADAPTER CALL ROUTING |
|------------------------------------------------------------|
| Format: | AT [cmds] S63=n [cmds] |
|-----------------+------------------------------------------|
| Default: | 15 |
|-----------------+------------------------------------------|
| Range: | 0 - 15 |
|-----------------+------------------------------------------|
| Description: | Selects which analog adapters may answer |
| | which calls. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+--------+----------------------------------------|
| 0 | 0 | Calls to analog adapter 1 may not be |
| | | answered by analog adapter 1. |
| | í 1 | |
| | | Calls to analog adapter 1 may be |
| | | answered by analog adapter 1. |
|------------------------------------------------------------|
| 1 | 0 | Calls to analog adapter 1 may not be |
| | | answered by analog adapter 2. |
| | í 1 | |
| | | Calls to analog adapter 1 may be |
| | | answered by analog adapter 2. |
|--------------+------+--------------------------------------|
| 2 | 0 | Calls to analog adapter 2 may not be |
| | | answered by analog adapter 1. |
| | í 1 | |
| | | Calls to analog adapter 2 may be |
| | | answered by analog adapter 1. |
|--------------+------+--------------------------------------|
| 3 | 0 | Calls to analog adapter 2 may not be |
| | | answered by analog adapter 2. |
| | í 1 | |
| | | Calls to analog adapter 2 may be |
| | | answered by analog adapter 2. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-ANSWER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S0=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the TA will automatically |
| | answer incoming calls. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S0=0 | Auto-answer disabled. |
|--------------+---------------------------------------------|
| S0=1 | Auto-answer enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ANSWER DELAY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S75=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the TA waits to answer an |
| | incoming call. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S75=0 | TA does not wait to answer an incoming |
| | call. |
|--------------+---------------------------------------------|
| S75=1 | TA waits two seconds to answer an incoming |
| | call. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALL TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S61=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the TA will force a |
| | particular call type. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S61=0 | D command dials in standard mode and DD |
| | command dials in 56Kbps permissive mode. |
|--------------+---------------------------------------------|
| S61=1 | Both commands dial in 56Kbps permissive |
| | mode. |
|--------------+---------------------------------------------|
| S61=2 | Both commands dial in standard mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLER ID - ANALOG ADAPTER 1 |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S65? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the Caller ID information for |
| | analog adapter 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLER ID - ANALOG ADAPTER 2 |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S66? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the Caller ID information for |
| | analog adapter 2. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLER ID - ISDN |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S67? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the Caller ID information for the |
| | ISDN line. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CHALLENGE HANDSHAKE AUTHENTICATION PROTOCOL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S84=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the TA will attempt to use |
| | CHAP. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S84=0 | CHAP negotiation enabled. |
|--------------+---------------------------------------------|
| í S84=1 | CHAP negotiation disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the TA will use STAC |
| | compression. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | STAC compression disabled. |
|--------------+---------------------------------------------|
| %C2 | STAC compression enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL - STANDARD |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials the number indicated to make a |
| | standard ISDN connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL - PERMISSIVE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] DD<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials the number indicated to make a 56Kbps |
| | permissive connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION AND STATISTICS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \S [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the settings of all commands and |
| | statistics about the current connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY FIRMWARE VERSION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %V [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the current firmware version. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested about the |
| | modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Displays product identification code. |
|--------------+---------------------------------------------|
| I1 | Displays ROM checksum. |
|--------------+---------------------------------------------|
| I3 | Displays modem model, interface, firmware |
| | revision and date, and boot version. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY INTERNAL VERSION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %S [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays an internal version number. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY REGISTERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %R [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the settings of S-registers. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DYNAMIC BANDWIDTH ALLOCATION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S70=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether dynamic bandwidth |
| | allocation will be used to allow |
| | simultaneous data and voice calls. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S70=0 | Dynamic bandwidth allocation disabled. |
|--------------+---------------------------------------------|
| í S70=1 | Dynamic bandwidth allocation enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ENDPOINT DISCRIMINATOR |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S83=nnnn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the endpoint discriminator address for |
| | multipoint PPP systems. Up to twenty |
| | numbers may be specified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ENDPOINT DISCRIMINATOR CLASS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S82=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the endpoint discriminator class for |
| | multipoint PPP systems. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S82=1 | User-defined address. |
|--------------+---------------------------------------------|
| S82=2 | IP address. |
|--------------+---------------------------------------------|
| S82=3 | 802.1 MAC address. |
|--------------+---------------------------------------------|
| S82=4 | PPP magic number block. |
|--------------+---------------------------------------------|
| í S82=5 | Public Switched Network Directory number. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCAL SERIAL PORT SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the speed of the local serial port. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í $B0 | Auto-detect serial port speed (cannot |
| | detect 230.4Kbps speed.) |
|--------------+---------------------------------------------|
| $B1200 | Set serial port speed to 1200bps. |
|--------------+---------------------------------------------|
| $B2400 | Set serial port speed to 2400bps. |
|--------------+---------------------------------------------|
| $B4800 | Set serial port speed to 4800bps. |
|--------------+---------------------------------------------|
| $B9600 | Set serial port speed to 9600bps. |
|--------------+---------------------------------------------|
| $B19200 | Set serial port speed to 19.2Kbps. |
|--------------+---------------------------------------------|
| $B38400 | Set serial port speed to 38.4Kbps. |
|--------------+---------------------------------------------|
| $B57600 | Set serial port speed to 57.6Kbps. |
|--------------+---------------------------------------------|
| $B115200 | Set serial port speed to 115.2Kbps. |
|--------------+---------------------------------------------|
| $B230400 | Set serial port speed to 230.4Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S60=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the line speed that the TA will |
| | attempt to connect at. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S60=56 | TA will attempt to connect at 56Kbps. |
|--------------+---------------------------------------------|
| S60=64 | TA will attempt to connect at 64Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MULTILINK PPP |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S80=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the TA will use Multilink |
| | PPP. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S80=0 | Multilink PPP disabled. |
|--------------+---------------------------------------------|
| í S80=1 | Multilink PPP enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PHONE NUMBER 1 |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S51=<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the TA’s first phone number. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PHONE NUMBER 2 |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S53=<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the TA’s second phone number. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - B-CHANNEL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S71=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the TA will use on the |
| | B channels. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S71=0 | Auto-select common protocol. |
|--------------+---------------------------------------------|
| S71=1 | TA will use PPP conversion. |
|--------------+---------------------------------------------|
| S71=2 | TA will use V.120 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í Q0 | Result codes enabled. |
|--------------+---------------------------------------------|
| Q1 | Result codes disabled. |
|--------------+---------------------------------------------|
| Q2 | Result codes enabled in originate mode |
| | only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERVICE PROFILE IDENTIFIER 1 |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S52=<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the TA’s first SPID. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERVICE PROFILE IDENTIFIER 2 |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S54=<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the TA’s second SPID. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SWITCH TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S50=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the type of switch the TA is connected |
| | to. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S50=0 | TA is connected to unknown switch type. |
|--------------+---------------------------------------------|
| S50=1 | TA is connected to AT&T 5ESS custom switch. |
|--------------+---------------------------------------------|
| S50=3 | TA is connected to National NI-1 switch. |
|--------------+---------------------------------------------|
| S50=6 | TA is connected to DMS-100 or Siemens EWSD |
| | switch. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TERMINAL ENDPOINT IDENTIFIER 1 |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S55? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the first TEI assigned by the ISDN |
| | switch. A value of 255 indicates that the |
| | switch did not assign a TEI. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TERMINAL ENDPOINT IDENTIFIER 1 STATUS |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S57? [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value indicating the status of |
| | the first TEI. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | TA has not attempted to initialize with |
| | SPID 1. |
|--------------+---------------------------------------------|
| 1 | TA succeeded in initializing with SPID 1. |
|--------------+---------------------------------------------|
| 2 | TA failed in initializing with SPID 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TERMINAL ENDPOINT IDENTIFIER 2 |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S56? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the second TEI assigned by the |
| | ISDN switch. A value of 255 indicates that |
| | the switch did not assign a TEI. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TERMINAL ENDPOINT IDENTIFIER 2 STATUS |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S58? [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value indicating the status of |
| | the second TEI. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | TA has not attempted to initialize with |
| | SPID 2. |
|--------------+---------------------------------------------|
| 1 | TA succeeded in initializing with SPID 2. |
|--------------+---------------------------------------------|
| 2 | TA failed in initializing with SPID 2. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| U INTERFACE STATUS |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S59? [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value indicating the status of |
| | the U interface. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| 0 | U interface is not synchronized. |
|--------------+---------------------------------------------|
| 1 | U interface is synchronized. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.120 FRAME TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S73=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the frame type that the TA will use |
| | when in V.120 mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S73=0 | TA will use I frames. |
|--------------+---------------------------------------------|
| S73=1 | TA will use UI frames. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.120 MAXIMUM FRAME SIZE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S74=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 256 |
|--------------+---------------------------------------------|
| Range: | 240 - 256 |
|--------------+---------------------------------------------|
| Unit: | 1 byte |
|--------------+---------------------------------------------|
| Description: | Selects the maximum frame size used for |
| | V.120 mode. |
|--------------+---------------------------------------------|
| Note: | Adtran ISDN uses a maximum frame size of |
| | 253 bytes. |
+------------------------------------------------------------+