[cisco-voip] Verizon SIP -->CUBE-->Remote MGCP FXS

[Nick Matthews]

They were probably working out of pure luck.

The difference between a passthrough call and normal G.711 isn't as
significant as it sounds.

In passthrough:
-The echo canceller is disabled (fax machines enable theirs locally)
-DTMF is disabled
-Jitter buffer is extended (the router holds packets longer before playing
them)

So there's a pretty decent chance that any given fax may work over G711.

-nick

On Wed, Jun 20, 2012 at 1:30 PM, Mathew Miller <miller.mathew at gmail.com>wrote:

> Debug ccsip message from a failed outbound call shows normal call
> clearing...
>
> Jun 20 10:18:09.072: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
> Sent:
> SIP/2.0 200 OK
> Via: SIP/2.0/TCP 10.203.191.228:5060;branch=z9hG4bK1074173b53f0a1
> From: "Main Fax" <sip:XXXXXXX at 10.203.191.228
> >;tag=2368178~e952bc0c-4f58-439d-b667-bfcb0cb2837d-35295113
> To: <sip:13127523690 at 10.X.X.240>;tag=17088A78-28F
> Date: Wed, 20 Jun 2012 15:18:09 GMT
> Call-ID: dceaa00-fe11e98d-37d03-e4bfcb0a at 10.203.191.228
> Server: Cisco-SIPGateway/IOS-12.x
> CSeq: 103 BYE
> Reason: Q.850;cause=16
> Content-Length: 0
>
>
>
>
>
>
> On Wed, Jun 20, 2012 at 12:08 PM, Paul <asobihoudai at yahoo.com> wrote:
>
>> What do your 'debug sip messages' and your 'SIP stack' traces tell you
>> about when/how the FAX calls are failing?
>>
>>
>>
>>
>> ________________________________
>> From: Mathew Miller <miller.mathew at gmail.com>
>> To: Cisco VOIP <cisco-voip at puck.nether.net>
>> Sent: Wednesday, June 20, 2012 12:44 PM
>> Subject: [cisco-voip] Verizon SIP -->CUBE-->Remote MGCP FXS
>>
>>
>> Hello All,
>>
>> I have a centralized CUCM 8.6 cluster with a Verizon centralized sip
>> trunk service coming into a cube with 15.2.t2a.
>>
>> I have several remote site with 2921's with VIC3-4FXSDID cards that are
>> MGCP controlled. When these were initially rolled out we tested faxes in
>> and out and they seemed to work just fine. Recently they have stopped
>> working and I am unable to figure out why. I have seem some posts that
>> maybe MGCP fax passthough will not work with verizon because they don't
>> support nse only protocol based.… But I am confused about why it worked
>> previously and stopped work now….
>>
>> I can see inbound/outbound fax calls come in and setup as G711 calls, but
>> the calls never completed.
>>
>>
>> From the cube..
>> voice service voip
>>  no ip address trusted authenticate
>>  address-hiding
>>  allow-connections sip to sip
>>  no supplementary-service sip refer
>>  redirect ip2ip
>>  fax protocol pass-through g711ulaw
>>  no fax-relay sg3-to-g3
>>  modem passthrough nse codec g711ulaw redundancy
>>  sip
>>   bind control source-interface Loopback1
>>   bind media source-interface Loopback1
>>   header-passing
>>   localhost dns:XXXXXX.globalipcom.com
>>   no update-callerid
>>   early-offer forced
>>   midcall-signaling passthru
>>   g729 annexb-all
>>   sip-profiles 2
>>
>>
>> From the remote MGCP router.
>>
>> mgcp dtmf-relay voip codec all mode out-of-band
>> mgcp rtp unreachable timeout 1000 action notify
>> mgcp modem passthrough voip mode nse
>> mgcp modem passthrough voip redundancy
>> mgcp package-capability rtp-package
>> mgcp package-capability sst-package
>> mgcp package-capability pre-package
>> mgcp default-package mo-package
>> no mgcp package-capability res-package
>> no mgcp package-capability fxr-package
>> no mgcp timer receive-rtcp
>> mgcp sdp simple
>> mgcp fax t38 inhibit
>>
>> Any ideas would be appreciated…
>>
>> Thanks
>>
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20120620/46412561/attachment.html>