SIP gateway dial-plan and inter-digit issues.

Unanswered Question
Jul 28th, 2009

I have a VG200 series gateway that registers to a SIP host for service to an FXS port. There is no Communications Manager or CME involved, this is just a VG200 acting as a SIP gateway/endpoint for a fax machine on an FXS port.

I am trying to put together a dialplan that will allow the fax machine to dial out with 7,10, or 11 digits for US dialing. The client wants these patterns available without an access code. So I used the following dial-peers.

dial-peer voice 100 voip

destination-pattern 1[2-9]..[2-9]......

session protocol sipv2

session target dns:siphost.net

session transport udp

dtmf-relay rtp-nte digit-drop

codec g711ulaw

no vad

!

dial-peer voice 101 voip

destination-pattern [2-9].....T

session protocol sipv2

session target dns:siphost.net

session transport udp

dtmf-relay rtp-nte digit-drop

codec g711ulaw

no vad

!

dial-peer voice 102 voip

destination-pattern 011T

session protocol sipv2

session target dns:siphost.net

session transport udp

dtmf-relay rtp-nte digit-drop

codec g711ulaw

no vad

!

dial-peer voice 103 voip

destination-pattern [2-9]..[2-9]......

session protocol sipv2

session target dns:siphost.net

session transport udp

dtmf-relay rtp-nte digit-drop

codec g711ulaw

no vad

The problem is that 7 digit calls never match and send to the SIP host. The 'debug voip dialpeer all' just indicates that its waiting for more digits. I thought that I could use the 'T' in the dial-peer 101 to allow overlaping dial patterns and let the inter-digit timeout decide, but it never places the call. I have been web searching and found some indication that there is no inter-digit timeout for SIP gateways.

Has anyone else fought this before?

thanks,

I have this problem too.
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bgrunewald Wed, 07/29/2009 - 18:21

The config looks correct, at least for H.323 peers. I would run a "debug voice dial-peer" and see what peers are actually being selected for the 7 digit dial out.

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