McDewey

Configuration Considerations Fax relay is on by default on VoIP/VoFR/VoATM platforms such as the Cisco 3810, 2600, 3600, and 5300. If voice calls complete successfully between two routers, fax calls are supposed work, but when fax relay does not work or performance needs to be improved, there are some fax relay specific commands that you can issue as a precursor to troubleshoot the problem: fax rate • fax-relay ECM disable • fax NSF • fax protocol • fax rate Command The fax rate command is configured under the VoFR or VoIP dial-peer in configuration mode. The default setting is fax rate voice and this does not appear in the configuration under each dial-peer. fax rate Command

<#root> vnt-3660-23(config-dial-peer)# fax rate ? 12000 FAX 12000 BPS 14400 FAX 14400 BPS 2400 FAX 2400 BPS 4800 FAX 4800 BPS 7200 FAX 7200 BPS 9600 FAX 9600 BPS disable Disable Fax Relay voice Highest possible speed allowed by voice rate

The fax rate voice setting restricts the fax rate to the codec bandwidth. This restriction means that, if the