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

[Nick Matthews]

I've heard ruminations that they support it for inbound only.

-nick

On Wed, Jun 20, 2012 at 2:45 PM, Mathew Miller <miller.mathew at gmail.com>wrote:

> I noticed another site was working ok and tried some testing and  it was
> working ok... it had the command "mgcp modem passthrough voip redundancy"
> removed.
>
> I removed that command from the remote router that was not working and it
> started to work. Go figure. I guess I will go with pure luck until Verizon
> supports T.38 :)
>
> thanks
>
>
> On Wed, Jun 20, 2012 at 1:03 PM, Nick Matthews <matthnick at gmail.com>wrote:
>
>> 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
>>>>
>>>>
>>>> _______________________________________________
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>>>> cisco-voip at puck.nether.net
>>>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>>>
>>>
>>>
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>>>
>>
>
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