Bypass Mechanism For V.34 Fax Transmission; Relay Mode For T.30 And V.34 Faxes - AudioCodes Mediant 3000 User Manual
Gateway & enterprise sbc, family of media gateways & session border controllers
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Also See for Mediant 3000:
- User manual (1070 pages) ,
- Installation manual (90 pages) ,
- Hardware installation manual (88 pages)
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Notes:
•
Interworking of T.38 Version 3 is supported only for Gateway calls. For SBC calls,
the device forwards T.38 Version 3 transparently (as is) to the other leg (i.e., no
transcoding).
•
For T.38 Version 3 support, ensure that the relevant DSP firmware template is
installed on the device. For a list of supported DSP templates, see DSP
Templates.
•
The CNG detector is disabled in all the subsequent examples. To disable the CNG
detector, set the 'CNG Detector Mode' parameter (CNGDetectorMode) to Disable.
15.2.3.1 Bypass Mechanism for V.34 Fax Transmission
In this proprietary scenario, the device uses bypass (or NSE) mode to transmit V.34 faxes,
enabling the full utilization of its speed.
To use bypass mode for T.30 and V.34 faxes:
1.
In the Fax/Modem/CID Settings page, do the following:
a.
Set the 'Fax Transport Mode' parameter to Bypass (FaxTransportMode = 2).
b.
Set the 'V.22 Modem Transport Type' parameter to Enable Bypass
(V22ModemTransportType = 2).
c.
Set the 'V.23 Modem Transport Type' parameter to Enable Bypass
(V23ModemTransportType = 2).
d.
Set the 'V.32 Modem Transport Type' parameter to Enable Bypass
(V32ModemTransportType = 2).
e.
Set the 'V.34 Modem Transport Type' parameter to Enable Bypass
(V34ModemTransportType = 2).
2.
Set the ini file parameter, V34FaxTransportType to 2 (Bypass).
To use bypass mode for V.34 faxes, and T.38 for T.30 faxes:
1.
In the Fax/Modem/CID Settings page, do the following:
a.
Set the 'Fax Transport Mode' parameter to T.38 Relay (FaxTransportMode = 1).
b.
Set the 'V.22 Modem Transport Type' parameter to Enable Bypass
(V22ModemTransportType = 2).
c.
Set the 'V.23 Modem Transport Type' parameter to Enable Bypass
(V23ModemTransportType = 2).
d.
Set the 'V.32 Modem Transport Type' parameter to Enable Bypass
(V32ModemTransportType = 2).
e.
Set the 'V.34 Modem Transport Type' parameter to Enable Bypass
(V34ModemTransportType = 2).
2.
Set the ini file parameter, V34FaxTransportType to 2 (Bypass).
15.2.3.2 Relay Mode for T.30 and V.34 Faxes
In this scenario, V.34 fax machines are forced to use their backward compatibility with T.30
faxes and operate in the slower T.30 mode.
To use T.38 mode for V.34 and T.30 faxes:
1.
In the Fax/Modem/CID Settings page, do the following:
a.
Set the 'Fax Transport Mode' parameter to T.38 Relay (FaxTransportMode = 1).
b.
Set the 'V.22 Modem Transport Type' parameter to Disable
(V22ModemTransportType = 0).
Version 6.8
189
15. Media
Mediant 3000
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