C-4 Cisco BPX 8600 Series Reference
Modems, Dial-In and Dial-Out
Modems, Dial-In and Dial-Out
Customer service uses modems for diagnosing and correcting customer problems with installed
BPX switches. The modem that is currently recommended for use with the BPX switch is the Codex
Model V.34R.
A dial-in connection to a BPX switch RS-232 from customer service via a modem uses the
CONTROL port of the BPX switch. A dial-out connection from a BPX switch via a modem to
customer service uses the AUXILIARY port of the BPX switch. Refer to Table C-6 for interface
requirements.
Table C-6 Modem Interface Requirements
Motorola V.34R BPX Switch Dial-In Configuration
BPX Switch Auto-Answer (Dial-In to BPX switch)
The following is a setup procedure that allows customer service to dial in to the customer’s BPX
switch to provide support and troubleshooting:
Step 1 Using the cnfterm command, set the BPX CONTROL port speed to 9600 bps.
Step 2 Using the cnftermfunc command, set the terminal type to VT100/StrataView.
Step 3 To program the modem, temporarily attach a terminal to the modem using a straight
through RS-232 cable (DTE to DCE). The modem EIA port will automatically match the
9600 bps setting of the terminal.
Step 4 Enter the commands listed in Table C-7 to set up the modem for proper operation.
Note Consult the manual that is supplied with your modem for specific information concerning the
modem configuration. Call customer service for latest modem configuration information.
Step 5 Disconnect the terminal and the straight-through cable from the BPX CONTROL port.
Parameter Requirement
BPX switch Port Used: CONTROL port on BCC back card is used for auto-answer modem setup.
AUXILIARY port on a BCC back card is used for auto-dial modem setup.
Code: Standard 8-bit ASCII, 1 stop-bit, no parity.
Interface: RS-232 DCE.
Cable to modem: Null modem cable: CONTROL or AUXILIARY port to modem (DCE to DCE)
Phone Lines: Dedicated, dial-up business telephone line for Customer Service-to-BPX switch
modem.
Data Rate: All standard asynchronous data rates from 300 to 19200 bps, independently
software-selectable.
Supported Modems: Motorola V.34R 28.8 baud modem with or without talk/data button.
