MP-1xx SIP
MP-1xx SIP User’s Manual 116 Document #: LTRT-65404
Table 5-32: Channel Settings, Fax/Modem/CID Parameters (continues on pages 115 to 116)
Parameter Description
V.23 Modem Transport Type
[V23ModemTransportType]
V.23 Modem Transport Type that the gateway uses.
You can select:
Transparent [0].
Relay [1] = N/A.
Bypass [2] (default).
V.32 Modem Transport Type
[V32ModemTransportType]
V.32 Modem Transport Type that the gateway uses.
You can select:
Transparent [0].
Relay [1] = N/A.
Bypass [2] (default).
Note: This option applies to V.32 and V.32bis modems.
V.34 Modem Transport Type
[V34ModemTransportType]
V.34 Modem Transport Type that the gateway uses.
You can select:
Transparent [0].
Relay [1] = N/A.
Bypass [2] (default).
Note: This option applies to V.34 and V.90 modems.
Fax Relay Redundancy Depth
[FaxRelayRedundancyDepth]
Number of times that each fax relay payload is retransmitted to the network.
You can enter a value from 0 to 2.
The default value is 0.
Fax Relay Enhanced Redundancy
Depth
[FaxRelayEnhancedRedundancyD
epth]
Number of times that control packets are retransmitted when using the T.38
standard.
You can enter a value from 0 to 4.
The default value is 2.
Fax Relay ECM Enable
[FaxRelayECMEnable]
Disable [0] = Error Correction Mode (ECM) mode is not used during fax relay.
Enable [1] = ECM mode is used during fax relay (default).
Fax Relay Max Rate (bps)
[FaxRelayMaxRate]
Maximum rate, in bps, at which fax relay messages are transmitted.
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).
Fax/Modem Bypass Coder Type
[FaxModemBypassCoderType]
Coder the gateway uses when performing fax/modem bypass. Usually, high-bit-
rate coders such as G.711 should be used.
You can select:
G711 A-law 64 [0] (default).
G711 µ-law [1].
G726 32 [4].
G726 40 [11].
Fax/Modem Bypass Packing Factor
[FaxModemBypassM]
Number of (20 msec) coder payloads that are used to generate a fax/modem
bypass packet.
You can enter a value of 1, 2 or 3 coder payloads.
The default value is 1 coder payload.
CNG Detector Mode
[CNGDetectorMode]
Disable [0] = Don’t detect CNG (default)
Relay [1] = N/A.
Event Only [2] = Detect CNG on caller side and start fax session (if
IsFaxUsed=1)
Usually T.38 fax session starts when the “preamble” signal is detected by the
answering side. Some SIP gateways doesn’t’ support the detection of this fax
signal on the answering side, for these cases it is possible to configure the MP-
1xx gateways to start the T.38 fax session when the CNG tone is detected by the
originating side. However this mode is not recommended.
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