5.16.18. Inserting/Removing in a Queue (AMO LDAT) 
The term queuing incorporates inserting/removing assignment requests
for lines in a queue (trunk/direction).
The term queuing can be described as follows:
- waiting in the Route Advance Delay queue
- waiting in the OFF-hook queue
- waiting in the ON-hook queue
A call can be inserted/removed from a queue in the following two cases:
- If the LVAL of all trunk groups is identical and no B channel is found in any of the trunk groups, OFF-Hook Queuing (B) is executed directly.
- The trunk groups are prioritized. The call is initially queued via
the Route Advance Delay (A) feature. If, however, no B channel is found
in the highest prioritized trunk group, OFF-Hook Queuing (B) is executed
Figure 40. Inserting/removing according to LVAL
Removing calls: If a B channel is free, this is made available to
the call already inserted. In this context, the queue (A,B) in which
the call is located is irrelevant; assignment of the B channel is based
on the prioritization of the inserted call.
The following prioritization applies in this context:
Table 9. (The priority with the highest value is assigned first)
|
Prio
|
Designation
|
|
0
|
Insert station in ON-hook queue
|
|
1
|
Insert station in route ADV queue
|
|
2
|
Station
|
|
3
|
Insert station in OFF-hook queue
|
|
4
|
Attendant console
|
|
5
|
Multy level pre-preemption
|
|
6
|
Emergency
|