5.3.13  
Trunk queuing 
 
Implementing features, see also Manager E Trunk Queuing

Definition  
If users receive a busy signal following a trunk seizure request (because no free trunk is available), they can use a procedure to queue on a seized trunk (book a line). As soon as the trunk becomes available, the system recalls the first user in the queue. The user hears the CO dial tone and can set up the external connection.
It is not possible to invoke Trunk Queueing if the attempted call was placed through LCR.
Trunk Queueing can be invoked when all trunks on a Trunk group key show busy.
If the user is busy at the time of the recall, the trunk will camp on to the busy station and if the camp-on to is not answered within the default 20 seconds, the reservation is cancelled and the trunk is offered to the next station in the queue list.
If the user activated DND prior to receiving a recall from a queued trunk, the trunk reservation is cancelled and the trunk is offered to the next station in the queue list.
If the user had invoked Call forward (CFNA or CF), the recalling trunk will ignore the call forward and continue to ring at the requesting station. If not answered within default 20 seconds, the trunk reservation is cancelled.
A recalling trunk cannot be picked up by either Call Pick up - group or Call pick up - Directed.
If a reservation is placed against a trunk which has an appearance at one or more stations, the Trunk key's LED flashes at the recall rate at the station that invoked the queue request. The LED will be lit steadily at all other appearances.
Only one queue/reservation request is possible per telephone. If a second reservation is attempted, it overwrites the first.
A system-wide flag, Trunk reservation, enables/disables this feature
This feature can be invoked in one of the following two ways:
 •   Manual reservation (for display telephones)
 •   Automatic reservation (for all other types of telephones)
Trunk Reservation-Automatic
When this flag is activated and if a station is not assigned a free trunk after the usual trunk seizure procedures (random or specific), Busy tone is signaled at the station. After a fixed period (5 seconds), a positive acknowledgment tone is applied and the trunk is reserved, provided that the station has the appropriate CO call privilege.
Trunk Reservation-Manual
 •   This feature is available only to display telephones.
 •   This feature does not need to be configured in the database.
Trunk reservation is not possible in hands-free mode. In this case, the system interrupts call setup when it recognizes that the line is seized.  

Model-Specific Data  

 Subject  
 HiPath 3800  
 HiPath 3550  
 HiPath 3500  
 HiPath 3350  
 HiPath 3300  
Feature available in  
 x  
 x  
 x  
Hardware requirements  
 -  
 -  
 -  
Software requirements  
 V5.0 or later  
 V1.0 or later  
 V1.0 or later  

Dependencies/Restrictions  

 Subject  
 Dependency/Restriction  
Queue trunk  
A station can queue only one trunk.  
Trunk queuing feature  
The trunk queuing feature does not apply to S0 (not for U.S.).  
Recall  
A recall does not follow call management.  
Speakerphone mode  
Users can also use trunk queuing in speakerphone mode  
Trunk  
If a number of stations queue a trunk, the trunk is assigned in the order that the requests were received.  
LCR  
If LCR is active, trunks can not be queued.  
SIP  
Not possible for trunks to the ITSP because the complete destination station number must be known when the trunk is seized.  

HiPath 3000/5000 V9, Feature Description, Issue 7   up Top
Disclaimer & Copyright   ID: P31003H3590F100017618   2012-06-25