AudioCodes Mediant 500 E-SBC, User Manual

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User's Manual 54. Configuration Parameters Reference
Version 6.8 771 Mediant 500 E-SBC
Parameter Description
occur.

If the device is the receiver and the remote SIP UA does not send a
“CN” in the SDP, then no CNG occurs. If the remote side sends a
“CN”, the device attempts to be compatible with the remote side
and even if the codec’s SCE is disabled, CNG occurs.
If the ComfortNoiseNegotiation parameter is disabled, then the device
does not send “CN” in the SDP. However, if the codec’s SCE is
enabled, then CNG occurs.
Note: This parameter is applicable only to the Gateway application.
CLI: sdp-ecan-frmt
[SDPEcanFormat]
Defines the echo canceller format in the outgoing SDP. The 'ecan'
attribute is used in the SDP to indicate the use of echo cancellation.

[0] = (Default) The 'ecan' attribute appears on the 'a=gpmd' line.

[1] = The 'ecan' attribute appears as a separate attribute.

[2] = The 'ecan' attribute is not included in the SDP.

[3] = The 'ecan' attribute and the 'vbd' parameter are not included in
the SDP.
Note: This parameter is applicable only when the IsFaxUsed
parameter is set to 2, and for re-INVITE messages generated by the
device as result of modem or fax tone detection.
Web/EMS: First Call
Ringback Tone ID
CLI: 1st-call-rbt-id
[FirstCallRBTId]
Defines the index of the first ringback tone in the CPT file. This option
enables an Application server to request the device to play a distinctive
ringback tone to the calling party according to the destination of the
call. The tone is played according to the Alert-Info header received in
the 180 Ringing SIP response (the value of the Alert-Info header is
added to the value of this parameter).
The valid range is -1 to 1,000. The default is -1 (i.e., play standard
ringback tone).
Notes:

It is assumed that all ringback tones are defined in sequence in the
CPT file.

In case of an MLPP call, the device uses the value of this
parameter plus 1 as the index of the ringback tone in the CPT file
(e.g., if this value is set to 1, then the index is 2, i.e., 1 + 1).
Web: Reanswer Time
EMS: Regret Time
CLI: reanswer-time
[RegretTime] Digital: Defines the time period the device waits for an MFC R2
Resume (Reanswer) signal once a Suspend (Clear back) signal is
received from the PBX. If this timer expires, the call is released. Note
that this is applicable only to the MFC-R2 CAS Brazil variant.
The valid range is 0 to 255 (in seconds). The default is 0.
Web: PSTN Alert Timeout
EMS: Trunk PSTN Alert
Timeout
CLI: pstn-alert-timeout
[PSTNAlertTimeout] Digital: Defines the Alert Timeout (in seconds) for calls sent to the
PSTN. This timer is used between the time a Setup message is sent to
the Tel side (IP-to-Tel call establishment) and a Connect message is
received. If an Alerting message is received, the timer is restarted. If
the timer expires before the call is answered, the device disconnects
the call and sends a SIP 408 request timeout response to the SIP
party that initiated the call.
The valid value range is 1 to 600 (in seconds). The default is 180.
Note: If per trunk configuration (using TrunkPSTNAlertTimeout) is set
to other than default, the PSTNAlertTimeout parameter value is
overridden.
Web/EMS: RTP Only Mode
CLI: rtp-only-mode Enables the device to send and receive RTP packets to and from
remote endpoints without the need to establish a SIP session. The