User`s manual

SIP User's Manual 6. Gateway's ini File Configuration
Version 5.0 199 October 2006
Table 6-12: Channel Parameters (continues on pages 196 to 200)
ini File Field Name
Web Parameter Name
Valid Range and Description
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’ (described
in Table
6-2 on page 138).
EnableNoiseReduction
Enables / disables the DSP Noise Reduction mechanism.
0 = Disable (default).
1 = Enable.
Note: When this parameter is enabled the channel capacity might be
reduced.
EnableStandardSIDPayloadType
[Enable RFC 3389 CN Payload
Type]
Determines whether Silence Indicator (SID) packets that are sent and
received are according to RFC 3389.
0 = G.711 SID packets are sent in a proprietary method (default).
1 = SID (comfort noise) packets are sent with the RTP SID payload type
according to RFC 3389. Applicable to G.711 and G.726 coders.
ComfortNoiseNegotiation
[Comfort Noise Generation
Negotiation]
Enables negotiation and usage of Comfort Noise (CN).
Valid options include:
0 = Disable (default)
1 = Enable Comfort Noise negotiation
The use of CN is indicated by including a payload type for CN on the media
description line of the SDP. The agteway can use CN with a codec whose
RTP timestamp clock rate is 8,000 Hz (G.711/G.726). The static payload
type 13 is used. The use of CN is negotiated between sides; therefore, if
the remote side doesn't support CN, it is not used.
Note: Silence Suppression must be enabled to generate CN.
RTPSIDCoeffNum
Determines the number of spectral coefficients added to an SID packet
being sent according to RFC 3389. Valid only if
‘EnableStandardSIDPayloadType’ is set to 1.
The valid values are 0 (default), 4, 6, 8 and 10.
DTMFVolume
[DTMF Volume]
DTMF gain control value in dB (to the TDM side).
The valid range is -31 to 0 dB.The default value is -11 dB.
RxDTMFHangOverTime
Defines the Voice Silence time (in msec units) after playing DTMF or MF
digits to the Tel / PSTN side that arrive as Relay from the IP side.
Valid range is 0 to 2,000 msec.
Default is 1,000 msec.
TxDTMFHangOverTime
Defines the Voice Silence time (in msec units) after detecting the end of
DTMF or MF digits at the Tel / PSTN side when the DTMF Transport Type
is either Relay or Mute.
Valid range is 0 to 2,000 msec.
Default is 100 msec.
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
(default).
Note: This parameter is automatically updated if one of the following
parameters is configured: TxDTMFOption or RxDTMFOption.