3COM CORPORATION
US ROBOTICS 56K VOICE FAXMODEM (MODEL 0026500)
Card Type | Modem (asynchronous) |
Chipset | U.S. Robotics |
I/O Options | Voice, speakerphone, 25-pin serial port, power, RJ-45 connector, line in, line out |
Maximum Data Rate | 56Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Modulation | Bell 103/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34, V.34+ U.S. Robotics x2 |
Fax Modulation | ITU-T V.17, V.21, V.27ter, V.29 |
Video Modulation | ITU-T V.80 |
Error Correction/Compression | MNP5, V.42, V.42bis |
Fax Class | Class I & II |
Data Bus | External |

CONNECTIONS | |||
Function | Label | Function | Label |
25-pin serial port | CN1 | Line out | CN4 |
RJ-45 interface | CN2 | Line in | CN5 |
AC power | CN3 | Power button | POWER |
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
PWR | Unidentified | On | Power is on |
PWR | Unidentified | Off | Power is off |
SD | Unidentified | On | Modem is transmitting data |
SD | Unidentified | Off | Modem is not transmitting data |
RD | Unidentified | On | Modem is receiving data |
RD | Unidentified | Off | Modem is not receiving data |
LINK | Unidentified | On | Modem is receiving a signal from network |
LINK | Unidentified | Off | Modem is off-line |
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.