Hello every one!
I have a problem sending faxes through VoIP
This is what we have: PBX with VoIP Card --- Cisco --- E1 --- (Internet VPN) --- T1--- Cisco
The cisco router has activate the QoS, to priority the communication saving 512 kbps of bandwidth, for the matching VoIP ports.
The voice and faxes work fine, but when the bandwidth is over use, the voice is not affected but the faxes can not communicate even when the QoS is saving bandwidth for them. I been trying with traffic-shape, fax passthrough , fax relay and other options, but no one fix the problem.
I figure out that the cisco router is working only as data gateway not as voice gateway, because the VoIP card in the PBX is making job, so may I?m look to solve the problem in the wrong place.
The VoIP card is configured by a provider, but I try changing the communication options between G.729, G723 and G.711, when use G.711 the voice is better, but the same happen with the faxes.
The question is:
Do I have to correct the fax problem in the VoIP card configuration or is possible to fixed in the cisco Router?
If it can be in the Cisco router, I will appreciate any suggestion.
Thank you very much, regards.