3Com V7111 - VCX 4 Channels Analog FXO Media Gateway User Manual page 73

Channel Parameters
Table 18
INI File Field Name
*
GUI Parameter Name
V32ModemTransportType
(For V.32 and V.32bis modems)
(V32 Transport Type)
V34ModemTransportType
(For V.34 and V.90 modems)
(V34 Transport Type)
FaxModemBypassCoderType
(Fax/Modem Bypass Coder Type)
FaxBypassPayloadType
(Fax Bypass Payload Type)
T38ProtectionMode
DTMFVolume
(DTMF Volume)
DTMFTransportType
(DTMF Transport Type)
3Com VCX V7111 VoIP SIP Gateways User Manual
Valid Range and Description
0 = Transparent
2 = ModemBypass, (default)
0 = Transparent
2 = ModemBypass, (default)
Coder to be used while performing fax/modem bypass.
See acTCoders enumeration. Usually, high bit rate coders
such as G.711 and G.726/G.727 should be used.
0 = G711 A-law =0, (default)
1 = G711 µ-law=1
4 = G726_32
11 = G727_32
Fax Bypass RTP dynamic payload type (Default = 102)
0 = Use redundancy packets for protecting T.38 fax relay
stream, (default)
1 = Use Forward Error Correction (FEC) algorithm to
protect T.38 fax relay stream (is not implemented)
-31 to 0, corresponding to -31 dBm to 0 dBm in 1 dB steps
(default = -11 dBm) DTMF gain control.
0 = erase digit from voice stream, do not relayed to remote.
1 = erase digit from voice stream, relay to remote. (Default)
2 = digits remains in voice stream.
3 = erase digit from voice stream, relay to remote
according to RFC 2833 standard.
7 = digits are sent using RFC 2833 standard, but received
RFC 2833 digits are muted from the audio stream.
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