Optimizing Fax Passthru Unveiling the Potential of NSE and ReINVITE

After about 3 hours of tinkering Vonage and I discovered that changing the the FAX Passthru Method from ReINVITE to NSE on the Voice>Line 1>Audio Configuration ... With pass-through, the fax traffic is carried between the two gateways in RTP packets using an uncompressed format resembling the G.711 codec. NSE Based switchover - This is proprietary and works only between Cisco voice gateways. Passthrough. T.38 Relay. GW------------------ ... Configure SPA2102​. Provider and registration as per usual. ... FAX Passthru Method, ReINVITE. DTMF Tx Method, Auto, DTMF Tx Mode, Strict. DTMF Tx Strict Hold Off ... Fax & Modem Transport Modes. Fax/Modem Settings. Users may choose to use one of the following transport methods for fax and for each modem ... signaling event (NSE) to ReINVITE: Web-ui > Voice tab > Line N tab > Audio Configuration > FAX Passthru Method: ReINVITE. Optionally, you can change the FAX ... Login to Admin Page http://192.168.15.1 user and password = admin (All lower case) ... Fax Passthru Method = ReINVITE; Fax Process NSE = no; Fax ... ... method for establishing and transmitting a fax session when the device detects a fax. ... fax and modem bypass mode, Named Signaling Event (NSE) packets. Configurations on the user end may be incomplete or could be affected by changes; Pass through negotiation for faxes may not always work and may require ... 3. Fax tones are exchanged inband. 4. Fax Passthrough is a special case of Modem Passthrough. VBD (Voice Band Data) is Modem Passthrough.