AudioCodes Mediant 1000 User Manual page 153

SIP User's Manual
Table 5-29: Media Settings, Fax/Modem/CID Parameters (continues on pages 152 to 153)
Parameter
V.34 Modem Transport Type
[V34ModemTransportType]
Fax Relay Redundancy Depth
[FaxRelayRedundancyDepth]
Fax Relay Enhanced Redundancy
Depth
[FaxRelayEnhancedRedundanc
yDepth]
Fax Relay ECM Enable
[FaxRelayECMEnable]
Fax Relay Max Rate (bps)
[FaxRelayMaxRate]
Fax/Modem Bypass Coder Type
[FaxModemBypassCoderType]
Fax/Modem Bypass Packing
Factor
[FaxModemBypassM]
CNG Detector Mode
[CNGDetectorMode]
Version 5.0
Description
V.90 / V.34 Modem Transport Type that the gateway uses.
You can select:
0 = Disable (Transparent)
1 = Enable Relay -- N/A
2 = Enable Bypass -- default
3 = Events Only (Transparent with Events)
Number of times that each fax relay payload is retransmitted to the network.
The valid range is 0 to 2.
The default value is 0.
Number of times that control packets are retransmitted when using the T.38
standard.
The valid range is 0 to 4.
The default value is 2.
Disable [0] = Error Correction Mode (ECM) mode is not used during fax
relay.
Enable [1] = ECM mode is used during fax relay (default).
Maximum rate (in bps), at which fax relay messages are transmitted
(outgoing calls).
You can select:
2400 [0] = 2.4 kbps.
4800 [1] = 4.8 kbps.
7200 [2] = 7.2 kbps.
9600 [3] = 9.6 kbps.
12000 [4] = 12.0 kbps.
14400 [5] = 14.4 kbps (default).
Note: The rate is negotiated between the sides, i.e., the gateway adapts to
the capabilities of the remote side.
Coder the gateway uses when performing fax/modem bypass. Usually, high-
bit-rate coders such as G.711 should be used.
You can select:
G.711 A-law 64 [0] (default).
G.711 µ-law [1].
Number of (20 msec) coder payloads that are used to generate a
fax/modem bypass packet.
The valid range is 1, 2 or 3 coder payloads.
The default value is 1 coder payload.
[0] = Disable (default). Don't detect CNG.
[1] = Relay. CNG is detected on the originating side. CNG packets are sent
to the remote side according to T.38 (if IsFaxUsed=1) and the fax session is
started.
[2] = Events Only. CNG is detected on the originating side. The CNG signal
passes transparently to the remote side and fax session is started.
Usually T.38 fax session starts when the 'preamble' signal is detected by the
answering side. Some SIP gateways don't support the detection of this fax
signal on the answering side, thus, for these cases it is possible to configure
the gateways to start the T.38 fax session when the CNG tone is detected
by the originating side. However, this mode is not recommended.
153
5. Web Management
December 2006