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14.4KBPS DATA/FAX MODEM EXTERNAL 7851 MODEL 1

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.