AudioCodes E-SBC User Manual

CHAPTER15 Media
Mediant 1000 Gateway & E-SBC | User's Manual
Fax / Modem Transparent Mode
In this mode, fax and modem signals are transferred using the current voice coder without
notifications to the user and without automatic adaptations. It's possible to use Profiles (see
Coders and Profiles ) to apply certain adaptations to the channel used for fax / modem. For
example, to use the coder G.711, to set the jitter buffer optimization factor to 13, and to enable echo
cancellation for fax and disable it for modem.
➢ To configure fax / modem transparent mode:
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.
2. On the Fax/Modem/CID Settings page, do the following:
● Set the 'Fax Transport Mode' parameter to Disable (FaxTransportMode = 0).
● Set the 'V.21 Modem Transport Type' parameter to Disable (V21ModemTransportType =
0).
● Set the 'V.22 Modem Transport Type' parameter to Disable (V22ModemTransportType =
0).
● Set the 'V.23 Modem Transport Type' parameter to Disable (V23ModemTransportType =
0).
● Set the 'V.32 Modem Transport Type' parameter to Disable (V32ModemTransportType =
0).
● Set the 'V.34 Modem Transport Type' parameter to Disable (V34ModemTransportType =
0).
3. Configure the [BellModemTransportType] parameter to [0] (transparent mode).
4. Configure the following optional parameters:
● Coders in the Coders table - see Configuring Coder Groups.
● 'Dynamic Jitter Buffer Optimization Factor' (DJBufOptFactor) - Configuring the Dynamic
Jitter Buffer.
● 'Echo Canceller' (EnableEchoCanceller) - see Configuring Echo Cancellation.
This mode can be used for fax, but is not recommended for modem transmission.
Instead, use the Bypass (see Fax/Modem Bypass Mode) or Transparent with Events
modes (see Fax / Modem Transparent with Events Mode) for modem.
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:
● Set the 'Fax Transport Mode' parameter to Bypass (FaxTransportMode = 2).
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AudioCodes E-SBC Specifications

General

Brand	AudioCodes
Model	E-SBC
Category	Gateway
Language	English