AudioCodes Mediant 500 E-SBC, User Manual

Page: 770 / 920

User's Manual 770 Document #: LTRT-10437
Mediant 500 E-SBC
Parameter Description
device can then manipulate the number further, using the Number
Manipulation tables to leave only the last 3 digits (for example) for
sending to a PBX.
EMS: Use SIP URI For
Diversion Header
[UseSIPURIForDiversionH
eader]
Defines the URI format in the SIP Diversion header.

[0] = 'tel:' (default)

[1] = 'sip:'
[TimeoutBetween100And1
8x] Defines the timeout (in msec) between receiving a 100 Trying
response and a subsequent 18x response. If a 18x response is not
received within this timeout period, the call is disconnected.
The valid range is 0 to 180,000 (i.e., 3 minutes). The default is 32000
(i.e., 32 sec).
[EnableImmediateTrying] Determines if and when the device sends a 100 Trying in response to
an incoming INVITE request.

[0] = 100 Trying response is sent upon receipt of a Proceeding
message from the PSTN.

[1] = (Default) 100 Trying response is sent immediately upon
receipt of INVITE request.
[TransparentCoderPresentat
ion] Determines the format of the Transparent coder representation in the
SDP.

[0] = clearmode (default)

[1] = X-CCD
[IgnoreRemoteSDPMKI] Determines whether the device ignores the Master Key Identifier (MKI)
if present in the SDP received from the remote side.

[0] Disable (default)

[1] Enable
[TrunkStatusReportingMode
] Determines whether the device responds to SIP OPTIONS if all the
trunks pertaining to Trunk Group #1 are down.

[0] Disable (default)

[1] Enable = If all the trunks pertaining to Trunk Group #1 are down,
the device does not respond to received SIP OPTIONS.
Web: Comfort Noise
Generation Negotiation
EMS: Comfort Noise
Generation
CLI: com-noise-gen-nego
[ComfortNoiseNegotiation
]
Enables negotiation and usage of Comfort Noise (CN) for Gateway
calls.

[0] Disable

[1] Enable (default)
The use of CN is indicated by including a payload type for CN on the
media description line of the SDP. The device can use CN with a
codec whose RTP time stamp 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. Regardless of the device's settings, it always attempts to
adapt to the remote SIP UA's request for CNG, as described below.
To determine CNG support, the device uses the
ComfortNoiseNegotiation parameter and the codec’s SCE (silence
suppression setting) using the CodersGroup parameter.
If the ComfortNoiseNegotiation parameter is enabled, then the
following occurs:

If the device is the initiator, it sends a “CN” in the SDP only if the
SCE of the codec is enabled. If the remote UA responds with a
“CN” in the SDP, then CNG occurs; otherwise, CNG does not