AudioCodes MP-11x Configuration Manual page 14

Audiocodes T.38 FAX Configuration Guide
For T.38 signaling in the EMS, under Configuration, at the bottom, choose Media
Settings. In the FAX Settings frame, refer to the following parameter description and use
the settings in the example.
Fax Transport Mode Sets the Fax transport
0 = disable (transparent mode)
1 = relay, (default, to be used for T.38)
2 = bypass.
FaxTransportMode = 1
Fax Relay Enhanced Redundancy Depth
0 to 4 (default =0)
Number of repetitions to be applied to each fax control packet
FaxRelayEnhancedRedundancyDepth = 2
Fax Relay Redundancy Depth
0 to 2 (default =0)
Number of repetitions to be applied to each fax relay payload when transmitting to
network
FaxRelayRedundancyDepth = 2
Fax Relay Max Rate
Limits the maximum rate at which fax messages are transmitted.
0 = 2.4 kbps
1 = 4.8 kbps
2 = 7.2 kbps
3 = 9.6 kbps
4 = 12.0 kbps
5 = 14.4 kbps, (default)
FaxRelayMaxRate = 5
Fax Relay ECM Enable
0 = Disable using ECM mode during Fax Relay
1 = Enable using ECM mode during Fax Relay. (default)
FaxRelayECMEnable = 1
CNG Detector Mode
The terminating gateway sends T.38 packets immediately after the T.38 capabilities are
negotiated in SIP. However, the originating device by default, sends T.38 (assuming the
T.38 capabilities are negotiated in SIP) only after it receives T.38 packets from the
remote device. This default behavior cannot be used when the originating device is
located behind a firewall that blocks incoming T.38 packets on ports that have not yet
Verizon T.38 FAX Configuration Guide for AudioCodes MP-11x
Version 1.0
Page 14
30-APR- 2011
Page 14 of 42