Rfc 2833 Ans Report Upon Fax/Modem Detection; Fax Support - AudioCodes Mediant 500L User Manual

Gateway folder > Gateway General Settings), and then from the 'Fax Signaling
Method' drop-down list (IsFaxUsed), select No Fax.
2. On the Fax/Modem/CID Settings page, do the following:
a. Set the 'Fax Transport Mode' parameter to Disable (FaxTransportMode = 0).
b. Set the 'V.21 Modem Transport Type' parameter to Disable
(V21ModemTransportType = 0).
c. Set the 'V.22 Modem Transport Type' parameter to Disable
(V22ModemTransportType = 0).
d. Set the 'V.23 Modem Transport Type' parameter to Disable
(V23ModemTransportType = 0).
e. Set the 'V.32 Modem Transport Type' parameter to Disable
(V32ModemTransportType = 0).
f. Set the 'V.34 Modem Transport Type' parameter to Disable
(V34ModemTransportType = 0).
3. Set the ini file parameter, BellModemTransportType to 0 (transparent mode).
4. Configure the following optional parameters:
a. Coders in the Coders table - see ''Configuring Coder Groups'' on page 429.
b. 'Dynamic Jitter Buffer Optimization Factor' (DJBufOptFactor) - ''Configuring the
Dynamic Jitter Buffer'' on page 200.
c. 'Echo Canceller' (EnableEchoCanceller) - see ''Configuring Echo Cancellation'' on
page 185.
Note: This mode can be used for fax, but is not recommended for modem
transmission. Instead, use the Bypass (see ''Fax/Modem Bypass Mode'' on page 191)
or Transparent with Events modes (see ''Fax / Modem Transparent with Events
Mode'' on page 193) for modem.

14.2.2.8 RFC 2833 ANS Report upon Fax/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

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:
a. Set the 'Fax Transport Mode' parameter to Bypass (FaxTransportMode = 2).
b. Set the 'V.xx Modem Transport Type' parameters to Enable Bypass
(VxxModemTransportType = 2).
3. Set the ini file parameter, FaxModemNTEMode to 1 (enables this feature).
14.2.3 V.34 Fax Support
V.34 fax machines can transmit data over IP to the remote side using various methods.
The device supports the following modes for transporting V.34 fax data over IP:

T.38 Version 3 - V.34 fax relay mode
User's Manual
Mediant 500L Gateway & E-SBC
194 Document #: LTRT-10532