Specifications

Configuration Tasks

Cisco IOS Release 12.0(3)T

Verify the Dial Peer Conﬁguration

You can check the validity of your dial peer conﬁguration by performing the following tasks:

• If you have relatively few dial peers conﬁgured, you can use the show dial-peer voice command

to verify that the data conﬁgured is correct. Use this command to display a speciﬁc dial peer or

to display all conﬁgured dial peers.

• Use the show dialplan number command to show the dial peer to which a particular number

(destination pattern) resolves.

Tips

If you are having trouble connecting a call and you suspect the problem is associated with dial peer

conﬁguration, you can try to resolve the problem by performing the following tasks:

• Ping the associated IP address to conﬁrm connectivity. If you cannot successfully ping your

destination, refer to the “Conﬁguring IP” chapter in the Cisco IOS 12.0 Network Protocols

Conﬁguration Guide, Part 1.

• Use the show dial-peer voice command to verify that the operational status of the dial peer is up.

• Use the show dialplan number command on the local and remote routers to verify that the data

is conﬁgured correctly on both.

• If you have conﬁgured number expansion, use the show num-exp command to check that the

partial number on the local router maps to the correct full E.164 telephone number on the remote

router.

• If you have conﬁgured a CODEC value, there can be a problem if both VoIP dial peers on either

side of the connection have incompatible CODEC values. Make sure that both VoIP peers have

been conﬁgured with the same CODEC value.

• Use the debug vpm spi command to verify that the output string the router dials is correct.

• Use the debug cch323 rtp command to check RTP packet transport.

• Use the debug cch323 h245 command to check logical channel negotiation.

• Use the debug cch323 h225 command to check the call setup.

Distinguish Voice and Modem Calls on the Cisco AS5300

When the Cisco AS5300 is handling both modem and voice calls, it needs to be able to identify the

service type of the call—that is, whether the incoming call to the server is a modem or a voice call.

In a mixed environment, where the server receives both modem and voice calls, you need to identify

the service type of the call. You can identify the service type of the call in one of two ways:

• Conﬁgure the incoming called-number command on the voice dial peer associated with the

interface over which the call comes in

• Assign the called-number to a modem pool.

It helps to understand the logic behind the algorithm the system uses to distinguish voice and modem

calls. The algorithm is as follows:

If the called-number matches a number from the modem pool,

handle the call as a modem call

If the called-number matches a configured dial peer incoming called number,

handle the call as a voice call

Else handle the call as a modem call by default modem pool