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