do you need inbound dial-peer in SIP enviroment?

Unanswered Question
Jun 7th, 2010

Looking at a lot of SIP config examples for CME I see that many configs show an inbound dial-peer for SIP trunks but others do not.  Is the inbound dial-peer needed?  What is its purpose?

Thanks

Diego

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Jaime Valencia Mon, 06/07/2010 - 16:07

Each and every single call has 2 calls legs, one defined by the outbound DP and another one using the inbound DP.

You use an inbound DP to define the specific requirements you might need for your network (ie direct-inward-dial) so you don't use the default one.

Importance of Inbound Dial Peers

http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a0080147524.shtml#importance

Matching Inbound Dial Peers

Inbound Dial Peers Elements and Attributes

http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a0080147524.shtml#importance

HTH

java

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DIEGO ALONSO Wed, 06/09/2010 - 06:18

Thanks for the link java.  Very helpful.  However, this info still leaves me confused.  The doc states that you need the inbound peer if you need to match non-default settings and applications for incoming calls.  Furthermore, it states that the default session protocol is H.323.  So, it would seem that if you are using SIP trunks an inbound peer would be required to match SIP as sessions protocol.  So how is it that some SIP trunk configs omit an inbound SIP dial peer?  I would think that these setups wouldn't work but the people proposing them as examples apparently have them working.  Strange, no?

Diego

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