Version 6.6 595 October 2014
Installation & Operation Manual 40. General SIP Configuration
Parameter
Name
Type
Provisioning
Type
Description
Enable Busy
Out
Enum
Disabled, Enabled
Instant Defines whether the Busy Out feature is
enabled.
When Busy Out is enabled and certain
scenarios exist, the device performs the
following:
All E1/T1 trunks are automatically taken out
of service by taking down the D-Channel or
by sending a Service Out message for T1
PRI trunks supporting 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 device can't communicate with the
proxy (according to the Proxy Keep-Alive
mechanism) and no other alternative
route exists to send the call.
The IP Connectivity mechanism is
enabled and there is no connectivity to
any destination IP address.
Notes:
The Busy Out behavior varies between
different protocol types.
The Busy-Out condition can also be applied
to a specific Trunk Group. If there is no
connectivity to the Serving IP Group of a
specific Trunk Group, all the physical trunks
pertaining to that Trunk Group are set to the
Busy-Out condition. Each trunk uses the
proper Out-Of- Service method according to
the selected ISDN/CAS variant.
You can use the parameter Digital Out-Of-
Service Behavior to select the method for
setting digital trunks to Out-Of-Service.
ISDN
Disconnect On
Busy Tone
Detection
Enum
No, Yes
Instant Defines whether an ISDN call is
disconnected upon detection of a busy tone.
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