SERIES II INTELLIGENT DATA/FAX MODEMS

If the $VD1 command is entered when in Auto-Answer mode, the modem answers immediately upon receiving the first ring.

There is no disconnect message (NO CARRIER) if a normal connection is made.

V.25bis Set-Up and Initialization

Before you operate your modem in the V.25bis mode, you need to make sure it is set up properly (various RS-232 lines such as DSR and CTS act as specified in the V.25bis standard). Setup involves proper DIP-Switch settings and soft-switches (software controlled conditions).

V.25bis DIP-Switches

#1 Unforced DTR #2 NA

#3 NA

#4 NA

#5 Auto-Answer enabled

#6 Async - Max throughput set Sync - Slave Clocking unforced

#8 - Command Mode forced #9 - Digital Loopback Off #10 - Dial-Up

#11 - Async - AT/Series II Resp.

#12 - Async/Sync mode set per requirements

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Black Box MD1641A, MD1640A manual 25bis Set-Up and Initialization, 25bis DIP-Switches