NEC NDA-24311 Manuale Utente
NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
NDA-24311, Issue 1
Page 69
Inter-Office Off-Hook Queuing - PRI
I-36
I-36 Inter-Office
Off-Hook
Queuing
-
PRI
General Description
This feature can be employed in a main-satellite configuration to allow a satellite user to queue for LEAST COST
ROUTING - 3/6-DIGIT - PRI [L-31] at the main location. This feature can also be used when all outgoing ISDN
trunks are concentrated at the main location.
ROUTING - 3/6-DIGIT - PRI [L-31] at the main location. This feature can also be used when all outgoing ISDN
trunks are concentrated at the main location.
Operating Procedure
Operation at the main location
1.
The main location receives dialed digits from the satellite location via ISDN trunk (a TANDEM TIE
TRUNK [T-1]).
TRUNK [T-1]).
2.
The main location determines that no ISDN trunks are available and places the call in an available Hold
on Queue.
on Queue.
3.
The main location returns service set tone to the satellite caller.
4.
The satellite caller remains off-hook, and waits for the call to be completed. (When an ISDN trunk
becomes available, the satellite caller is connected.)
becomes available, the satellite caller is connected.)
5.
If there are no Hold on Queues available, the main location returns reorder tone to the satellite caller.
6.
If the satellite caller goes on-hook (ISDN trunk releases) while in queue, the assigned Hold on Queue is
cleared.
cleared.
Service Conditions
1.
This feature is usually used in conjunction with LEAST COST ROUTING - 3/6-DIGIT - PRI [L-31].
2.
There is a maximum of 32 Queuings per Module Group (MG) available in the system. Therefore, only 32
stations/MG can use OFF-HOOK QUEUING [O-7], - PRI [O-28], OUTGOING TRUNK QUEUING
[O-2], and - PRI [O-24] simultaneously.
stations/MG can use OFF-HOOK QUEUING [O-7], - PRI [O-28], OUTGOING TRUNK QUEUING
[O-2], and - PRI [O-24] simultaneously.
3.
If the incoming tie trunk is a loop signal trunk, the caller will hear service set tone while waiting in queue
for a maximum of 3 minutes. After this period, the trunk automatically will be released.
for a maximum of 3 minutes. After this period, the trunk automatically will be released.
4.
When an ISDN trunk becomes available, the dialed number is automatically sent to the connecting Central
Office.
Office.
5.
If all Off-Hook Queuing slots are in use, reorder tone (fast busy tone) is sent to the satellite office.
6.
The connecting patterns available for this service are as follows:
a.) Non-ISDN trunk to ISDN trunk
b.) CCIS trunk to ISDN trunk
c.) ISDN trunk to Non-ISDN trunk
d.) ISDN trunk to CCIS trunk
e.) ISDN trunk to ISDN trunk
b.) CCIS trunk to ISDN trunk
c.) ISDN trunk to Non-ISDN trunk
d.) ISDN trunk to CCIS trunk
e.) ISDN trunk to ISDN trunk
7.
In case a call terminates to ISDN trunk, billing starts when the call is placed in a queue.