Technical data

Step 5—Configuring the Serial Channels to Let Modem Calls Come in
Dial Solutions Quick Configuration Guide
2-14
Step 5—Configuring the Serial Channels to Let Modem Calls Come in
The async shell service is the first service to enable. Configure the D channels to allow incoming
voice calls to be routed to the integrated modems.
In the section “Configuration DDR,” the D channel configuration is expanded to also accept ISDN
synchronous PPP calls from the remote offices. Cisco recommends getting modem users up first.
Configure
To configure the serial channels, use the following commands beginning in global configuration
mode:
Step Command Purpose
1
hq-sanjose(config)# interface serial 0:23
Enter configuration mode for the D-channel serial
interface that corresponds to controller T1 0
1
.
The behavior of S0:0 through S0:22 is controlled by
the configuration instructions provided for S0:23.
This concept is also true for the other remaining
D channel configurations.
1. The D channel is the signaling channel.
2
hq-sanjose(config-if)# isdn incoming-voice modem
hq-sanjose(config-if)# no shutdown
Enable analog modem voice calls coming in over the
B channels to be connected to the integrated modems.
3
hq-sanjose(config-if)# exit
Exit back to global configuration mode.
4
hq-sanjose(config)# interface serial 1:23
hq-sanjose(config-if)# isdn incoming-voice modem
hq-sanjose(config-if)# no shutdown
hq-sanjose(config-if)# exit
hq-sanjose(config)# interface serial 2:23
hq-sanjose(config-if)# isdn incoming-voice modem
hq-sanjose(config-if)# no shutdown
hq-sanjose(config-if)# exit
hq-sanjose(config)# interface serial 3:23
hq-sanjose(config-if)# isdn incoming-voice modem
hq-sanjose(config-if)# no shutdown
hq-sanjose(config-if)# exit
hq-sanjose(config)#
Configure the three remaining D channels with the
same settings.