Nortel Networks Mediant TP-1610 SIP - Manual (Page 130)

Mediant 2000 SIP
Mediant 2000 SIP User’s Manual 130 Document #: LTRT-72504
Table 6-7: Channel Parameters (continues on pages 128 to 131)
ini File Field Name
Web Parameter Name
* Valid Range and Description
V34ModemTransportType
[V.34 Modem Transport Type] V.34 Modem Transport Type that the gateway uses.
You can select:
0 = Transparent
2 = Modem Bypass (default).
Note:
This option applies to V.34 and V.90 modems.
InputGain
[Input Gain] PCM input gain control in dB. This parameter sets the level for the received
(PSTN IP) signal.
You can enter a value from -32 to 31 dB.
The default value is 0 dB.
Note:
This parameter is intended for advanced users. Changing it affects other
gateway functionalities.
VoiceVolume
[Voice Volume] Voice gain control in dB. This parameter sets the level for the transmitted
(IP PSTN) signal.
You can enter a value from -32 to 31 dB.
The default value is 0 dB.
RTPRedundancyDepth
[RTP Redundancy Depth] 0 = Disable redundancy packets generation (default)
1 = Enable generation of RFC 2198 redundancy packets.
RFC2198PayloadType RTP redundancy packet payload type, according to RFC 2198.
The range is 96-127. The default is 104.
Applicable if “RTPRedundancyDepth=1”
EnableSilenceCompression
[Silence Suppression]
The parameter SCE is used to
maintain backward compatibility. 0 = Silence Suppression disabled (default).
1 = Silence Suppression enabled.
2 [Enable without adaptation] = A single silence packet is sent during silence
period (applicable only to G.729).
Silence Suppression is a method conserving bandwidth on VoIP calls by not
sending packets when silence is detected.
Note:
If the selected coder is G.729, the following rules determine the value of
the “annexb” parameter of the fmtp attribute in the SDP.
EnableSilenceCompression = 0 “annexb=no”.
EnableSilenceCompression = 1 “annexb=yes”.
EnableSilenceCompression = 2 and IsCiscoSCEMode = 0 “annexb=yes”.
EnableSilenceCompression = 2 and IsCiscoSCEMode = 1 “annexb=no”.
IsCiscoSCEMode 0 = There isn’t a Cisco gateway at the remote side (default).
1 = There is a Cisco gateway at the remote side.
When there is a Cisco gateway at the remote side, the local gateway must set
the value of the “annexb” parameter of the fmtp attribute in the SDP to “no”. This
logic should be used if ‘EnableSilenceCompression = 2’ (enable without
adaptation). In this case, Silence Suppression should be used on the channel but
not declared in the SDP.
EnableEchoCanceller
[Echo Canceler]
The parameter ECE is used to
maintain backward compatibility. 0 = Echo Canceler disabled.
1 = Echo Canceler Enabled (default).
Note:
Refer also to the parameters ‘MaxEchoCancellerLength’ and
‘EchoCancellerLength’ (described in Table 6-1 on page 90 ).
EnableStandardSIDPayloadType
[Enable RFC 3389 CN Payload Type] 0 = Disable (default).
1 = Enable.
If enabled, the SID (comfort noise) packets are sent with the RTP SID payload
type according to RFC 3389. Applicable to G.711 and G.726 coders.
If disabled, the G.711 SID packets are sent in a proprietary method.
DTMFVolume
[DTMF Volume] -31 to 0 corresponding to -31 dBm to 0 dBm in 1 dB steps (default = -11 dBm)
DTMF gain control.
DTMFTransportType
[DTMF Transport Type] 0 = Erase digits from voice stream, do not relay to remote.
2 = Digits remain in voice stream.
3 = Erase digits from voice stream, relay to remote according to RFC 2833.
Note:
This parameter is automatically updated if one of the following parameters
is configured: IsDTMFUsed, TxDTMFOption or RxDTMFOption.