RFC 2833 ANS Report upon Fax and Modem Detection

The device (terminator gateway) sends RFC 2833 ANS/ANSam events upon detection of fax and/or modem answer tones (i.e., CED tone). This causes the originator to switch to fax/modem. The parameter is applicable only when the fax or modem transport type is set to bypass, Transparent-with-Events, V.152 VBD, or G.711 transport. When the device is located on the originator side, it ignores these RFC 2833 events.

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To configure RFC 2833 ANS Report upon fax/modem detection:

1.

Open the Gateway General Settings page (Setup menu > Signaling & Media tab > Gateway folder > Gateway General Settings), and then from the 'Fax Signaling Method' drop-down list (IsFaxUsed), select No Fax or Fax Fallback.

2.

On the Fax/Modem/CID Settings page, do the following:

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Configure the 'Fax Transport Mode' parameter to Bypass [FaxTransportMode = 2].

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Configure the 'V.xx Modem Transport Type' parameters to Enable Bypass [VxxModemTransportType = 2].

3.

Configure the [FaxModemNTEMode] parameter to [1] (enables this feature).