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The use case Scenario: Keep Logged Out State provides the requirement
to prevent the logged out phone registered with the Call Server forESA
from reregistering.
When this scenario occurs, the VOLO phone will sustain it’s Awaiting
Callback state until the ESAVOLOtimer expires, and returns to it’s original
Logged Out state, to give you the chance to go back to normal registration
by using the soft key provided.
Configure ESA Data Block
Configure the VOLO BLOCK only for the lowestcustomer number. If you
configure a low customer number after youconfigure the VOLO BLOCK for
a higher customer, the number is not handled. The VO set cannot register
as the configuration of the VOLO TN cannot occur in LD24 under such a
situation. The VO set that tries to register in this case receives the prompt
Service Not Available.
Because you can define the ESA data blockfor any customer, you can
define the ESTN pool for any customer as well. The ESTN pool will only
be required for customers that have access to the VO Login feature (lowest
customer number for the time being).
Sysload
Scenario: Load ESA VO Logout Settings
•This scenario begins when the system starts loading the configuration
database from disk
•The ESA VO Logout data configured in the Manage ESA Data and
Manage ESTN Data scenarios.
Warm Start
An active call to or from PSAP survives a warm start. In AwaitingCallback
state, the VOLO set will be able to register back to Call Server with the
same VOLO TN. But since it will loose it’s VOLO timer,and itis not possible
to distinguish between this situation and a first time registration, it is not
possible to reload the timer. To avoid this scenario, the Signalling Server
must deregister the phone and put it back to “Logged out” state.
Emergency Services For Client Mobility
The Emergency Services Access feature is composes a CLID that identifies
the physical location of the logged phone. If a system is configured with
an internal LIS server, the location update might not happen right after
the set registers.
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright© 2007, Nor tel Networks
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