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.