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# U.S. ROBOTICS, INC.
SPORTSTER 56K FAXMODEM (EXTERNAL)
Card Type Modem (asynchronous)
Chipset U.S. Robotics, Inc.
Maximum Data Rate 56Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 103A/212A
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis, V.34
U.S. Robotics x2
Fax Modulation ITU-T V.17, V.21CH2, V.27ter, V.29
Error MNP5, V.42, V.42bis
Correction/Compression
Fax Class Class I & II
Data Bus Serial
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-------------------+-------+------------------------+-------|
| DC power in | CN1 | Telephone line in | CN3 |
|-------------------+-------+------------------------+-------|
| Serial port | CN2 | Telephone line out | CN4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-------+--------+----------+--------------------------------|
| AA | Red | On | Auto-answer enabled |
|-------+--------+----------+--------------------------------|
| AA | Red | Off | Auto-answer disabled |
|-------+--------+----------+--------------------------------|
| AA | Red | Blinking | Phone is ringing |
|-------+--------+----------+--------------------------------|
| CD | Red | On | Carrier signal detected |
|-------+--------+----------+--------------------------------|
| CD | Red | Off | Carrier signal not detected |
|-------+--------+----------+--------------------------------|
| SD | Red | Blinking | Modem is transmitting data |
|-------+--------+----------+--------------------------------|
| SD | Red | Off | Modem is not transmitting data |
|-------+--------+----------+--------------------------------|
| RD | Red | Blinking | Modem is receiving data |
|-------+--------+----------+--------------------------------|
| RD | Red | Off | Modem is not receiving data |
|-------+--------+----------+--------------------------------|
| TR | Red | On | DTR signal is high |
|-------+--------+----------+--------------------------------|
| TR | Red | Off | DTR signal is low |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (CON'T) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|---------+-------+----------+-------------------------------|
| CS | Red | On | CTS signal is high |
|---------+-------+----------+-------------------------------|
| CS | Red | Off | CTS signal is low |
|---------+-------+----------+-------------------------------|
| ARQ/FAX | Red | On | Modem is connected in error |
| | | | correction mode |
|---------+-------+----------+-------------------------------|
| ARQ/FAX | Red | Off | Modem is not connected in |
| | | | error correction mode |
|---------+-------+----------+-------------------------------|
| ARQ/FAX | Red | Blinking | Modem is connected in FAX |
| | | | mode or modem is |
| | | | retransmitting data due to |
| | | | errors |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, D, E, F, H, L, M, O, P, T, V, X, Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &P, &R, &S, &T, &W |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S18, S25, S38 |
|------------------------------------------------------------|
| Note: See MHI help file for complete information. |
+------------------------------------------------------------+
Proprietary AT Command Set
See U.S. ROBOTICS SPORTSTER 56K FAXMODEM (INTERNAL) for a full
command summary.