FAX Passthru vs. Reinvited Unlocking the True Potential of Faxing

Fax in Voip Env….. Joy and pain…. In this post I'll show how to configure Asterisk 13/FreePbx 12 to use T.38 Fax capabilities to receive fax ... When a re-invite is received with G711 and silence suppression is off as part of retrieve request, the call is not treated as fax transition ... FAX Passthru Codec: G711u (USA) or G711a (rest of the world) FAX Passthru method: ReINVITE. FAX Enable T38: yes. FAX T38 ECM Enable: yes. Fax ... ... difference: Passthrough is the method of using G.711 and RTP to transmit fax whereas Relay is the method of using T.38. Pass-through is the ... Jitter buffer to fixed and high; Disable Line Echo Canceller (LEC): Yes; Disable Network Echo Suppressor: Yes; Optional: (Re-INVITE After Fax ... Passthrough works like a normal voice call, the fax is encoded via an appropriate codec and the encoded samples are transported using RTP (Real- ... Select the codec for fax passthrough, G711u or G711a. The default is G711u. Select the fax passthrough method: None, NSE, or ReINVITE. The default is NSE ... We, in no way block faxes and our customers are free to attempt to send and ... Fax Mode: set to passthrough. Re-INVITE After Fax Tone Detected: set to ... When implementing the transport method besides the fax settings such as fax ... or response might pass through many intermediate routers and ... changing codecs should not require a re-invite, as you can switch between the negotiated codecs at the RTP level, so if that was the intention, ...