Cisco GRP Manual de usuario descargar pdf (Pagina 17)

The table describes the three call setup information elements.

Call Setup Information Elements

Call Setup Element Description

Called Number Dialed

Number Identification Service

This is the call-destination dial string, and it is derived from the ISDN

setup message or channel associated signaling Dialed Number

Identification Service (DNIS).

Calling Number Automatic

Number Identification

This is a number string that represents the origin, and it is derived from

the ISDN setup message or channel associated signaling (CAS)

automatic number identification (ANI). The ANI is also referred to as

the calling line ID.

Voice Port This represents the POTS physical voice port.

When the Cisco IOS router or gateway receives a call setup request, it makes a dial-peer match

for the incoming call. This is not digit-by-digit matching; instead, the router uses the full digit

string received in the setup request for matching against the configured dial peers.

The router or gateway matches call setup element parameters in the following order:

How the Router or Gateway Matches Inbound Dial Peers

Step Action

1. The router or gateway attempts to match the called number of the call setup request with the

configured incoming called-number of each dial peer.

2. If a match is not found, the router or gateway attempts to match the calling number of the call

setup request with answer-address of each dial peer.

3. If a match is not found, the router or gateway attempts to match the calling number of the call

setup request to the destination-pattern of each dial peer.

4. The voice port uses the voice port number associated with the incoming call setup request to

match the inbound call leg to the configured dial peer port parameter.

5. If multiple dial peers have the same port configured, then the router or gateway matches the

first dial peer added to the configuration.

6. If a match is not found in the previous steps, then the default is dial peer 0.

Because call setups always include DNIS information, it is recommended that you use the

incoming called-number command for inbound dial-peer matching. Configuring incoming

called-number is useful for a company that has a central call center providing support for a

number of different products. Purchasers of each product get a unique 1-800 number to call for

support. All support calls are routed to the same trunk group destined for the call center. When

a call comes in, the computer telephony system uses the DNIS to flash the appropriate message

on the computer screen of the agent to whom the call is routed. The agent will then know how

to customize the greeting when answering the call.

The calling number ANI with answer-address is useful when you want to match calls based on

the originating calling number. For example, when a company has international customers who

require foreign-language-speaking agents to answer the call, the call can be routed to the

appropriate agent based on the country of call origin.

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