NEAX2400 ICS Business Features and Specifications
NDA-24143, Issue 4
Page 279
Inter-Office Off-Hook Queuing I-11
I-11 Inter-Office Off-Hook Queuing
General Description
This feature can be employed in a Main-Satellite configuration to allow a Satellite station user to queue
for LEAST COST ROUTING - 3/6-DIGIT [L-5] at the Main location. This feature can also be used when
all outgoing facilities 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 a TANDEM TIE TRUNK
[T-1].
2. The Main location determines that no trunks are available and places the call in an available
“hold on queue” slot.
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.
5. If there are no “hold on queue” slots available, the Main location will return Reorder Tone to the
Satellite caller.
6. If the Satellite caller goes on-hook (TANDEM TIE TRUNK [T-1] releases) while in queue, the
assigned “hold on queue” slot is cleared.
Service Conditions
1. This feature is usually used in conjunction with LEAST COST ROUTING - 3/6-DIGIT [L-5].
2. There are a maximum of 32 “queuing” slots per Module Group (MG), available in the system.
Therefore, only 32 stations/MG may utilize OFF-HOOK QUEUING [O-7] and OUTGOING
TRUNK QUEUING [O-2] simultaneously.
3. If the incoming tie trunk is a “Second Dial Tone” signal trunk, the caller will hear Service Set Tone
while waiting in queue for a maximum of 3 minutes. After this period, the trunk will automatically
be released.
4. When a trunk becomes available, the dialed number is automatically sent to the connecting
Central Office.
5. If all OFF-HOOK QUEUING [O-7] slots are in use, Reorder Tone (fast Busy Tone) will be sent
to the Satellite office.
Interactions
1. This feature is a combination of other features. See TRUNK-TO-TRUNK CONNECTION [T-10],
TANDEM SWITCHING OF TIE TRUNKS-2/4 WIRE [T-1], OFF-HOOK QUEUING [O-7],
OUTGOING TRUNK QUEUING [O-2] and LEAST-COST ROUTING 3/6 DIGIT [L-5].
2. Calls in queue are served on a first in/first out basis. All routes share a common queue.
3. This feature is used with LEAST-COST ROUTING-3/6 DIGIT [L-5]. It is not used with
ALTERNATE ROUTING [A-16], or MISCELLANEOUS TRUNK ACCESS [M-2].
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