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Configuring the Cisco AS5800 as an H.323 Gateway
Voice over IP for the Cisco AS5800 17
• 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 voip ccani inout command to verify 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.
Configuring the Cisco AS5800 as an H.323 Gateway
The Service Provider implementation of Voice over IP uses both gatekeepers and gateways. Because
of the extensive capabilities of the Cisco AS5800 universal access server, it is likely that it will
function as a carrier class gateway in a Service Provider environment. The final step in configuring
the Cisco AS5800 for Voice over IP functionality is to configure one of its interfaces as a gateway
interface. You can use either an interface that is connected to the gatekeeper or a loopback interface
for the gateway interface. The interface that is connected to the gatekeeper is usually a LAN
interface—Fast Ethernet, Ethernet, FDDI, or Token Ring.
To configure a gateway interface, perform the following steps beginning in the global configuration
mode:
For more information about configuring gateways and gatekeepers, refer to the Cisco IOS Release
12.0(3)T Service Provider Features for Voice over IP feature module.
Step Command Purpose
1
Router(config)# gateway
Enables the gateway.
2
Router(config)# ip cef
Enables Cisco Express Routing.
3 Configure the interface. This step will vary, depending on
the interface you select as being the interface connected to
the gatekeeper. For the purposes of this procedure, a Fast
Ethernet interface is used.
4
Router(config)# int fa0
Enters configuration mode for the configured Fast
Ethernet interface connected to the gatekeeper.
5
Router(config-if)# h323-gateway voip interface
Identifies this interface as a VoIP gateway interface.
6
Router(config-if)# h323-gateway voip id gatekeeper-id
{ipaddr ip-address [port-number]|multicast}
Defines the name and location of the gatekeeper for this
gateway.
7
Router(config-if)# h323-gateway voip h323-id
interface-id
Defines the H.323 name of the gateway, identifying this
gateway to its associated gatekeeper.
8
Router(config-if) h323-gateway voip tech-prefix prefix
Defines the technology prefix that the gateway will
register with the gatekeeper.