Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

tka
New Member

FXO/T38 Fax relay issue on a CCM-controlled MGCP gateway

Hello,

I set up a Right fax server. Evry thing is working fine using a PRI link.

However, when I tried to configure FXO analog lines to accept and forward T38 faxes, I wasn't able to make things work. There is no fax tone heard when calling the analog line connected to an FXO installed on a CCM-controlled 2811 MGCP gateway.

I have added the following line to the gateway config :

no mgcp fax t38 inhibit

mgcp package-capability fxr-package

mgcp default-package fxr-package

I noted that the call succed to reach the fax server ( using the Fax Entreprise Manager ).

However thre is no fax tone detected and there is no successful fax transmission !

When I type show voice call summary during a fax call , I note

"T38" written in the CODEC column whereas it should the rate used (14400) and VSTP column contains S_CONNECT instead of S_FAX

The gateway end point and the RF gateway are also in the same Device Pool

Is there any suggestions to solve this ?

Thanks in advance

1 REPLY
New Member

Re: FXO/T38 Fax relay issue on a CCM-controlled MGCP gateway

Here are a few snapshots from my VG224 and Cisco 2821.   Obvously I'm using FXS on the VG224...

voice service voip
fax protocol t38 ls-redundancy 2 hs-redundancy 0 fallback none

no ccm-manager fax protocol cisco

mgcp
mgcp call-agent xxx.xxx.xxx.xxx 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode nse
mgcp package-capability rtp-package
mgcp package-capability sst-package
mgcp default-package fxr-package
no mgcp package-capability res-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp fax rate 14400
mgcp rtp payload-type g726r16 static

Hope that gives some insite...

371
Views
0
Helpful
1
Replies
CreatePlease to create content