IBM CORPORATION
14.4KBPS DATA/FAX MODEM EXTERNAL 7851 MODEL 1
Card Type | Fax, Modem (synchronous, asynchronous) |
Chip Set | Unidentified |
Maximum Data Rate | 14.4Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Bus | External |
Fax Class | Class I & II |
Data Modulation Protocol | Bell 103/212A ITU-T V.21, V.22, V.22bis, V.32, V.32bis |
Fax Modulation Protocol | ITU-T V.17, V.21, V.27ter, V.29 |
Error Correction/Compression | MNP5, V.42, V.42bis |
CONNECTIONS | ||||||
Function | Label | Function | Label | |||
DC power | CN1 | Line in | CN4 | |||
RS-232/422 | CN2 | Power switch | SW1 | |||
Line out | CN3 |
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
TM | Red | On | Modem is in test mode |
TM | Red | Off | Modem is not in test mode |
TM | Red | Blinking | Errors detected |
AA | Red | On | Auto-answer enabled |
AA | Red | Off | Auto-answer disabled |
HS | Red | On | Modem is operating at 4800bps or faster |
HS | Red | Off | Modem is operating at slower than 4800bps |
OH | Red | On | Modem is off-hook |
OH | Red | Off | Modem is on-hook |
SD | Red | On | Modem is transmitting data |
SD | Red | Off | Modem is not transmitting data |
RD | Red | On | 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 |
CD | Red | On | Carrier signal detected |
CD | Red | Off | Carrier signal not detected |
Proprietary AT Command Set
See document V2011 for a full command summary.