[asterisk-users] any experience with cisco media gw with fax???

[Oguzhan Kayhan]

Hello, thanks or the quick replies.
I tried with both 1.6.2.9 and 1.6.2.17
My config is sipaxclient-asterisk-(siptrunk)-telcooperator-analogfax

All i know is telco uses cisco on their side..Not sure which version they
are using.

I got t38pt_udptl = yes parameter on sip.conf general.
Didnt make any other special settings or trunk config itself.

On monday, i better run a debug on sip protocol and paste what errors do i
have on that..
PLus if i can manage i will ask for version info about telco side.
Thank you.


>
> On Apr 16, 2011, at 9:27 AM, Steve Underwood wrote:
>
>> On 04/16/2011 01:24 PM, Oguzhan Kayhan wrote:
>>> Hello,
>>> We have a sip trunk end point with cisco media gateway.
>>> VoIP works fine.
>>> But when we try to send faxes thru this trunk, we simply can not.
>>>
>>> Is there anybody experienced such problem and solved?
>>> How should i set sip.conf and udptl.conf.
>>>
>>> I already have t38pt_udptl=yes in sip.conf
>>>
>>> Thank you.
>> How old is the Cisco software? It appears they completely changed their
>> T.38 software platform a couple of years ago. Before that is was awful.
>> I wasted a lot of time, while developing my T.38 platform, hunting down
>> problems that turned out to be broken Ciscos. Since the new software has
>> spread into the field, the complaints have largely gone away.
>
>
> I have the following in my dial-peers, but *KEEP IN MIND*, for calls
> placed to a POTS dial-peer on a Cisco, it won't do 'fax rate disable'
> etc.. on that side of the session if the origin doesn't match a dial peer
> as well, so it may be worthwhile to have a high priority (catchall) peer
> that has something like .T as the pattern with your catch-all parameters.
>
> PBX TIE:
>
> dial-peer voice 7700 pots
>  answer-address 77..
>  destination-pattern 77..
>  fax rate disable
>  port 0/0/0:23
>  prefix 77
> !
>
> Asterisk PEER:
>
> dial-peer voice 1000 voip
>  preference 1
>  answer-address 1...
>  destination-pattern 1...
>  session protocol sipv2
>  session target ipv4:10.0.0.1
>  session transport udp
>  dtmf-relay rtp-nte
>  codec g711ulaw
>  fax-relay ecm disable
>  fax rate disable
>  fax protocol pass-through g711ulaw
>  no vad
> !
>
> DID Setup:
>
> dial-peer voice 214915135 voip
>  destination-pattern 214915135.
>  session protocol sipv2
>  session target ipv4:10.0.0.1
>  session transport udp
>  dtmf-relay rtp-nte
>  codec g711ulaw
>  fax-relay ecm disable
>  fax rate disable
>  fax protocol pass-through g711ulaw
>  no vad
> !
> dial-peer voice 1350 pots
>  incoming called-number 214915135.
>  fax rate disable
>  direct-inward-dial
> !
>
>
>
>
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