Cisco CallManager Trunk SIP

En un entorno de procesos de llamadas distribuido, Cisco Callmanager se comunica con otro cluster Cisco Callmanager, PSTN u otro dispositivo como PBX, utilizando trunk signaling y gateway de voz.

Configuracion TRUNK
la configuracion Trunk en Cisco CallManager depende del diseño de red y protocolos de control de llamadas que son usados en IP WAN. Todos los protocolos requieren que un signaling interface (trunk) o un gateway debe ser creado para aceptar y originar llamadas. Se especifica el tipo de signaling interface cuando se configura el gateway en CallManager Cisco. Por ejemplo al configurar conecciones QSIG al CallManager se debe añadir un MCGP voice gateway que soporte protocol QSIG. Se configura el E1 PRI trunk interface a usar el tipo de protocol QSIG.

Trunk Types in Cisco CallManager Administration
•H.225 Trunk (Gatekeeper Controlled)
In a H.323 network that uses gatekeepers, use an H.225 trunk with gatekeeper control to configure a connection to a gatekeeper for access to other Cisco CallManager clusters and to H.323 devices. An H.225 trunk can communicate with any H.323 gatekeeper-controlled endpoint. When you configure an H.323 gateway with gatekeeper control in Cisco CallManager Administration, use an H.225 trunk. To choose this method, use Device > Trunk and choose H.225 Trunk (Gatekeeper Controlled).

•Intercluster Trunk (Gatekeeper Controlled)
In a distributed call-processing network with gatekeepers, use an intercluster trunk with gatekeeper control to configure connections between clusters of Cisco CallManager systems. Gatekeepers provide call admission control and address resolution for intercluster calls. A single intercluster trunk can communicate with all remote clusters. To choose this method, use Device > Trunk and choose Inter-Cluster Trunk (Gatekeeper Controlled) in Cisco CallManager Administration.

•Intercluster Trunk (Non-Gatekeeper Controlled)
In a distributed network that has no gatekeeper control, you must configure a separate intercluster trunk for each device pool in a remote cluster that the local Cisco CallManager can call over the IP WAN. The intercluster trunks statically specify the IP addresses or host names of the remote devices.To choose this method, use Device > Trunk and choose Inter-Cluster Trunk (Non-Gatekeeper Controlled) in Cisco CallManager Administration.

•SIP Trunk
Usamos SIP Trunk para configurar una interface de señalización con el Cisco CallManager para llamadas SIP.
SIP trunks (or signaling interfaces) connect Cisco CallManager clusters with a SIP proxy server.
Un SIP signaling interface usa port-based routing y Cisco CallManager acepta llamadas de cualquier gateway siempre y cuando los mensajes SIP arrivan al puerto que esta configurado como una interface de señalizacion SIP. La interface de señalización SIP usa request y responses para establecer, mantener y terminar llamadas entre 2 o más endpoints.
Para escoger este metodo: use Device > Trunk and escoger SIP Trunk in Cisco CallManager Administration.
You must also configure route groups and route patterns that use the SIP trunks to route the SIP calls.