Hello,
I think you have CUCM Version 7.1.5
You can try to configure T.38 on your Voice Gateways on the sites:
http://www.cisco.com/en/US/docs/voice_ip_comm/uc_system/UC5.0.1/ipt_system_arch/COL_FMT.html
or:
http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/cisco_ios_fax_services_over_ip_application_guide/t38.html
Configuration example:
Step 1 | voice service voip Example: Router(config)# voice service voip | Enters voice-service configuration mode. |
Step 2 | fax protocol t38 [nse [force]] [ls-redundancy value [hs-redundancy value]] [fallback {cisco | none | pass-through {g711ulaw | g711alaw}}] Example: Router(config-voi-serv)# fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw | Specifies the fax protocol for all VoIP dial peers. Keywords and arguments are as follows: • nse—(Optional) Use of Cisco named service events (NSEs) for fax signaling. •force—(Optional) Required use of NSEs for fax signaling, which permits interworking of H.323 or SIP gateways with MGCP gateways for T.38 fax relay. •ls-redundancy—(Optional) Number of redundant T.38 fax packets to be sent for the low-speed V.21-based T.30 fax machine protocol. Range varies by platform from 0 (no redundancy) to 5 or 7. For details, see CLI help. Default: 0. •hs-redundancy—(Optional) Number of redundant T.38 fax packets to be sent for high-speed V.17, V.27, and V.29 T.4 or T.6 fax machine image data. The value range varies by platform from 0 (no redundancy) to 2 or 3. For details, see CLI help. Default: 0. Note Setting the hs-redundancy parameter greater than 0 causes a significant increase in the network bandwidth consumed by the fax call. |
Step 3 | exit Example: Router(config-voi-serv)# exit | Exits voice-service configuration mode. |
Also here is a nice posting in the forum: Fax Configuration and Troubleshooting Project =>
https://supportforums.cisco.com/community/netpro/collaboration-voice-video/ip-telephony/blog/2010/10/26/fax-configuration-and-troubleshooting-project
Please rate helpful posts.
Kind regards,
Marcel Ammann
