SIP User's Manual 344 Document #: LTRT-65412
MP-11x & MP-124
6.15 Channel Parameters
This subsection describes the device's channel parameters.
6.15.1 General Parameters
The general channel parameters are described in the table below.
Table 6-55: General Channel Parameters
Parameter Description
Web: Max Number of
Active Calls
EMS: Maximum
Concurrent Calls
[MaxActiveCalls]
Defines the maximum number of simultaneous active calls supported
by the device. If the maximum number of calls is reached, new calls are
not established.
The default value is the maximum available channels (no restriction on
the maximum number of calls). The valid range is 1 to maximum
number of channels.
Web/EMS: Max Call
Duration (min)
[MaxCallDuration]
Defines the maximum call duration (in minutes). If this time expires,
both sides of the call are released (IP and Tel).
The valid range is 0 to 35,791. The default is 0 (i.e., no limitation).
[EnableUDPPortTranslati
on]
 [0] = Disable UDP port translation (default).
 [1] = Enable UDP port translation.
When enabled, the device compares the source UDP port of the first
incoming packet, to the remote UDP port stated in the opening of the
channel. If the two UDP ports don't match, the NAT mechanism is
activated. Consequently, the remote UDP port of the outgoing stream is
replaced by the source UDP port of the first incoming packet.
Notes:
 For this parameter to take effect, a device reset is required.
 The NAT mechanism and the IP address translation must be
enabled for this parameter to take effect (i.e., DisableNAT = 0,
EnableIpAddrTranslation = 1).
EMS: Is CISCO Sce Mode
[IsCiscoSCEMode]
Determines whether a Cisco gateway exists at the remote side.
 [0] = No Cisco gateway exists at the remote side (default).
 [1] = A Cisco gateway exists at the remote side.
When there is a Cisco gateway at the remote side, the device must set
the value of the 'annexb' parameter of the fmtp attribute in the SDP to
'no'. This logic is used if EnableSilenceCompression = 2 (enable
without adaptation). In this case, Silence Suppression is used on the
channel, but not declared in the SDP.
Note: The IsCiscoSCEMode parameter is only relevant when the
selected coder is G.729.
[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].
Web: Reanswer Time
EMS: Regret Time
[RegretTime]
The time interval from when the user hangs up the phone until the call
is disconnected (FXS). This allows the user to hang up and then pick
up the phone (before this timeout) to continue the call conversation.
Thus, it's also referred to as regret time.
The valid range is 0 to 255 (in seconds). The default value is 0.
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