Nortel Networks TP-1610 SIP V34ModemTransportType, InputGain, VoiceVolume, RTPRedundancyDepth

Mediant 2000 SIP

Table 6-7: Channel Parameters (continues on pages 128 to 131)

ini File Field Name		Valid Range and Description
Web Parameter Name*
V34ModemTransportType	V.34 Modem Transport Type that the gateway uses.
[V.34 Modem Transport Type]	You can select:
	0	= Transparent
	2	= Modem Bypass (default).
	Note: This option applies to V.34 and V.90 modems.
InputGain	PCM input gain control in dB. This parameter sets the level for the received
[Input Gain]	(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 gain control in dB. This parameter sets the level for the transmitted
[Voice Volume]	(IP PSTN) signal.
	You can enter a value from -32 to 31 dB.
	The default value is 0 dB.
RTPRedundancyDepth	0	= Disable redundancy packets generation (default)
[RTP Redundancy Depth]	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	0 = Silence Suppression disabled (default).
[Silence Suppression]	1 = Silence Suppression enabled.
The parameter SCE is used to	2 [Enable without adaptation] = A single silence packet is sent during silence
	period (applicable only to G.729).
maintain backward compatibility.	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	0	= Echo Canceler disabled.
[Echo Canceler]	1	= Echo Canceler Enabled (default).
The parameter ECE is used to	Note: Refer also to the parameters ‘MaxEchoCancellerLength’ and
maintain backward compatibility.	‘EchoCancellerLength’ (described in Table 6-1on page 90).
EnableStandardSIDPayloadType	0	= Disable (default).
[Enable RFC 3389 CN Payload Type]	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	-31 to 0 corresponding to -31 dBm to 0 dBm in 1 dB steps (default = -11 dBm)
[DTMF Volume]	DTMF gain control.
DTMFTransportType	0	= Erase digits from voice stream, do not relay to remote.
[DTMF Transport Type]	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.

Mediant 2000 SIP User’s Manual 130 Document #: LTRT-72504