AudioCodes Mediant 800B User Manual page 737

User's Manual
Parameter
Web: SIP T38 Version
[SIPT38Version]
Web: Fax Relay Enhanced
Redundancy Depth
EMS: Enhanced Relay
Redundancy Depth
[FaxRelayEnhancedRedundanc
yDepth]
Web: Fax Relay Redundancy
Depth
EMS: Relay Redundancy Depth
[FaxRelayRedundancyDepth]
Web: Fax Relay Max Rate (bps)
EMS: Relay Max Rate
[FaxRelayMaxRate]
Version 6.6

[2] Events Only = CNG is detected on the originating side and
a fax session is started by the originating side using the Re-
INVITE message. Usually, T.38 fax session starts when the
'preamble' signal is detected by the answering side. Some SIP
devices don't support the detection of this fax signal on the
answering side and thus, in these cases it is possible to
configure the device to start the T.38 fax session when the
CNG tone is detected by the originating side. However, this
mode is not recommended.
Note: This parameter can also be configured in an IP Profile.
Determines the T.38 fax relay version.

[-1] Not Configured = (Default) No T.38

[0] Version 0

[3] Version 3 = T.38 Version 3 (V.34 over T.38)
Note: For a description on V.34 over T.38 fax relay, see V.34 Fax
Support on page 155.
Defines the number of times that control packets are
retransmitted when using the T.38 standard.
The valid range is 0 to 4. The default is 2.
Defines the number of times that each fax relay payload is
retransmitted to the network.

[0] = (Default) No redundancy

[1] = One packet redundancy

[2] = Two packet redundancy
Note: This parameter is applicable only to non-V.21 packets.
Defines the maximum rate (in bps) at which fax relay messages
are transmitted (outgoing calls).

[0] 2400 = 2.4 kbps

[1] 4800 = 4.8 kbps

[2] 7200 = 7.2 kbps

[3] 9600 = 9.6 kbps

[4] 12000 = 12.0 kbps

[5] 14400 = 14.4 kbps (default)

[6] 16800bps = 16.8 kbps

[7] 19200bps = 19.2 kbps

[8] 21600bps = 21.6 kbps

[9] 24000bps = 24 kbps

[10] 26400bps = 26.4 kbps

[11] 28800bps = 28.8 kbps

[12] 31200bps = 31.2 kbps

[13] 33600bps = 33.6 kbps
Notes:

The rate is negotiated between both sides (i.e., the device
adapts to the capabilities of the remote side). Negotiation of
the T.38 maximum supported fax data rate is provided in SIP's
SDP T38MaxBitRate parameter. The negotiated
737
‎ 5 1. Configuration Parameters Reference
Description
Mediant 800B GW & E-SBC