05-22-2008 07:38 PM
I have a MGCP gateway registerd with CM 5.1 with a PRI. I'd like to use T.37 onramp to forward inbound faxes to Unity, but onramp is not supported with MGCP.
I have a translation pattern in CM pointing a test DID to a separate H.323 gateway which is a 3725 running 12.4(15)T5. The gateway is configured as follows:
!
dial-peer voice 20 mmoip
service fax_on_vfc_onramp_app out-bound
destination-pattern 1765
information-type fax
session target mailto:.....
!
dial-peer voice 10 voip
service onramp
incoming called-number 1765
!
The call routing seems to be working based on the following dial-peer trace:
10:06:08: //-1/80CDA72B2600/DPM/dpAssociateIncomingPeerCore:
Calling Number=1234567890, Called Number=1765, Voice-Interface=0x0,
Timeout=TRUE, Peer Encap Type=ENCAP_VOIP, Peer Search Type=PEER_TYPE_VOICE,
Peer Info Type=DIALPEER_INFO_SPEECH
10:06:08: //-1/80CDA72B2600/DPM/dpAssociateIncomingPeerCore:
Result=Success(0) after DP_MATCH_INCOMING_DNIS; Incoming Dial-peer=10
10:06:08: //-1/80CDA72B2600/DPM/dpAssociateIncomingPeerCore:
Calling Number=1234567890, Called Number=1765, Voice-Interface=0x0,
Timeout=TRUE, Peer Encap Type=ENCAP_VOIP, Peer Search Type=PEER_TYPE_VOICE,
Peer Info Type=DIALPEER_INFO_SPEECH
10:06:08: //-1/80CDA72B2600/DPM/dpAssociateIncomingPeerCore:
Result=Success(0) after DP_MATCH_INCOMING_DNIS; Incoming Dial-peer=10
10:06:08: //-1/80CDA72B2600/DPM/dpMatchPeersCore:
Calling Number=, Called Number=1765, Peer Info Type=DIALPEER_INFO_FAX
10:06:08: //-1/80CDA72B2600/DPM/dpMatchPeersCore:
Match Rule=DP_MATCH_DEST; Called Number=1765
10:06:08: //-1/80CDA72B2600/DPM/dpMatchPeersCore:
Result=Success(0) after DP_MATCH_DEST
10:06:08: //-1/80CDA72B2600/DPM/dpMatchPeersInfotype:
Result=SUCCESS(0)
List of Matched Outgoing Dial-peer(s):
1: Dial-peer Tag=20
The issue is that the call just hangs with no audio. All the documentation shows pots dial-peers for the inbound calls. I'm wondering if this works with voip dial peers and is there anything else I should try.
Thanks,
Todd
Solved! Go to Solution.
05-28-2008 05:32 PM
T.37 onramp calls must match a POTS dial-peer. Others have gotten around this type of issue by using a T1 cross-over cable between 2 POTS ports in a back-to-back type of configuration. Basically the gateway takes incoming H.323 call routes it to a T1 port that is connected right back into another T1 port on the same gateway. When the call re-enters the gateway, it can then match the required T.37 onramp POTS dial-peer. Granted, this is not the most elegant solution but it has had some success in scenarios similar to yours.
Regards,
David
05-24-2008 05:52 AM
The IOS architecture doesn't seem to allow this behaviour. T37 should always bypass DSP in order to convert the call.
05-28-2008 05:32 PM
T.37 onramp calls must match a POTS dial-peer. Others have gotten around this type of issue by using a T1 cross-over cable between 2 POTS ports in a back-to-back type of configuration. Basically the gateway takes incoming H.323 call routes it to a T1 port that is connected right back into another T1 port on the same gateway. When the call re-enters the gateway, it can then match the required T.37 onramp POTS dial-peer. Granted, this is not the most elegant solution but it has had some success in scenarios similar to yours.
Regards,
David
05-28-2008 05:52 PM
Wow! Great idea! I'll give it a try.
Thanks!
05-12-2009 04:12 AM
Hello,
Can we do the same back2back connection with only one gateway, to do the trick? (one gateway with several E1/T1 ports) ?
Thanks!
05-12-2009 09:09 AM
As David said above...
into another T1 port on the same gateway
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