SIP User's Manual 108 Document #: LTRT-68806
Mediant 2000 & TP-1610 & TP-260/UNI
Table 5-12: General Parameters (Advanced Parameters)
Parameter Description
Enable X-Channel Header
[XChannelHeader]
 [0] Disable = x-channel header is not used (default).
 [1] Enable = x-channel header is generated with trunk/B-channel
information.
The header provides information on the E1/T1 physical trunk/B-channel
on which the call is received or placed. For example 'x-channel: DS/DS1-
5/22', where 'DS/DS-1' is a constant string, '5' is the trunk number, and
'22' is the B-channel. This header is generated by the gateway and is
sent in the following messages: INVITE and 183/180/200OK responses.
Enable Busy Out
[EnableBusyOut]
 [0] Disable = 'Busy out' feature is not used (default).
 [1] Enable = 'Busy out' feature is enabled.
When Busy Out is enabled and certain scenarios exist, the gateway
performs a specific behavior:
If Busy out is enabled, all E1/T1 trunks are automatically put out of
service by taking down the D-Channel or by sending a Service Out
message for T1 PRI trunks that support these messages (NI-2, 4/5-ESS,
DMS-100 and Meridian):
These behaviors are performed due to one of the following scenarios:
 Physically disconnected from the network (i.e., Ethernet cable is
disconnected).
 The Ethernet cable is connected, but the gateway can't communicate
with any host. Note that LAN Watch-Dog must be activated
(EnableLANWatchDog = 1).
 The gateway can't communicate with the gatekeeper/proxy
(according to the Proxy keep-alive mechanism) and no other
alternative exists to send the call.
Note: The Busy Out behavior varies between different protocol types.
Default Release Cause
[DefaultReleaseCause]
Default Release Cause (to IP) for IPÆTel calls, used when the gateway
initiates a call release, and if an explicit matching cause for this release
isn't found, a default release cause can be configured:
The default release cause is: NO_ROUTE_TO_DESTINATION (3).
Other common values are: NO_CIRCUIT_AVAILABLE (34),
DESTINATION_OUT_OF_ORDER (27), etc.
Note: The default release cause is described in the Q.931 notation, and
is translated to corresponding SIP 40x or 50x values. For example, 404
for 3, 503 for 34, and 502 for 27.
For mapping of SIP-to-Q.931 and Q.931-to-SIP release causes, refer to
'Release Reason Mapping' on page 382.
Delay After Reset [sec]
[GWAppDelayTime]
Defines the amount of time (in seconds) the gateway's operation is
delayed after a reset cycle.
The valid range is 0 to 45. The default value is 7 seconds.
Note: This feature helps to overcome connection problems caused by
some LAN routers or IP configuration parameters change by a DHCP
Server.
Max Number of Active
Calls
[MaxActiveCalls]
Defines the maximum number of simultaneous active calls supported by
the gateway. If the maximum number of calls is reached, new calls are
not established.
The default value is max available channels (no restriction on the
maximum number of calls). The valid range is 1 to 240.
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