Conquering Fax Passthru Challenges None vs. Reinvite Solutions

Fax Pass-Through is a fax transport method where the T30 signals and ... voice service voip no modem passthrough fax protocol none no fax-relay ... 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 ... This option is the time we wait after we got the CED, to get V21 flags. This is to avoid to send a SIP re-invite in passthrough and few ms after ... 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, ... When implementing the transport method besides the fax settings such as fax ... or response might pass through many intermediate routers and ... I am looking for some information on setting up Asterisk 1.6 for T.38 Fax relay, or the best way to pass through fax transmissions. ... 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 ... Open the Gateway General Settings page (Setup menu > Signaling & Media tab > Gateway folder > Gateway General Settings), and then from the 'Fax Signaling Method ... If direct IP = yes and Initial... = no, then CM will send the first invite with a c= line for media to be on a gateway and a reinvite with the c ... 729). - Fax is detected at called-party, initiating the re-INVITE proposing G.711 A-law and T.38. - The originating SIP UA rejects the T.38 offer, answers with ...