Modems, Dial-In and Dial-Out
BPX Switch Peripherals C-7
Table C-9 V.34R with talk/data, Auto-Dial Configuration (dial-out to customer service)*
Figure C-2 Dial Modem Cabling for Auto Dial (dial-out to customer service)
Step Command Function
These configuration commands are for a V.34R modem that has a talk/data pushbutton.
1. AT&F Initializes factory defaults.
2. ATL1 Modem speaker at minimum volume.
3 AT\N3 To enable MNP error correction
4 AT%C To disable data compression
5 AT\J Enables DTE speed conversion
6 AT\Q1 Enables flow control
7 AT\T3 Enables 3-minute inactivity timer
8. AT&C1 DCD controlled by modem.
9. AT&D2 Modem disconnects when IPX toggles DTR.
10. AT&V Verify entries. (shows current configuration)
11. AT&W Saves current settings to non-volatile memory.
Auxillary
port
Modem
connector
1
2
3
4
5
6
20
7
1
2
3
4
5
8
20
7
CD
FG
TXD
RXD
RTS
CTS
DSR
DTR
SG
Legend
FG - Frame Ground
TXD - Transmit Data
RXD - Receive Data
RTS - Request To Send
CTS - Clear To Send
DSR - Data Set Ready
DTR - Data Terminal Ready
CD - Carrier Detect
SG - Signal Ground
Note: Cable must be connected in direction shown from node
to modem because wiring is not pin-to-pin symmetrical.
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