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Look-Ahead Interflow
8-4 Issue 4 September 1995
Here’s an example of an outflow vector that might be included in a sending
switch:
Figure 8-2. Sending Switch Outflow Vector
If split 3 has staffed agents, and if there are 30 or fewer calls queued to the split,
Step 3 queues the call to the split’s queue at a medium priority. In Step 4, an
announcement that apologizes for the delay is provided. Vector processing then
continues at Step 5, where music is provided for 20 seconds (Step 5). If the call
is still not answered after 20 seconds, a Look-Ahead Interflow attempt is made in
Step 6. If the call is accepted by the receiving switch, the call is removed from
split 3’s queue, and call control is passed to the receiving switch. If the receiving
switch denies the call, the call remains in queue, and an announcement followed
by music is provided. Step 9 sends control back to Step 6 unconditionally, thus
allowing the LAI attempt in the latter step to be made as many times as
necessary.
Returning to the first two vector steps, if split 3 does not have staffed agents, or if
there are more than 30 calls queued to the split, control is passed to Step 10,
which places an LAI call to a VDN (5001) at the receiving switch vector which, in
this case, is designed to always accept calls during working hours. Step 11
provides a busy tone in case all trunks to the receiving location are busy, or the
call is rejected because it is placed during nonworking hours.
Receiving Switch Operation
When the receiving switch receives the Look-Ahead Interflow request, the call
first routes to a VDN. The VDN then maps the call to the receiving switch’s inflow
vector, and vector processing begins, starting with inflow checking. Inflow
checking is enabled via conditional
goto
commands in the inflow vector. The
decision to accept or deny a call can be based on checks such as any of the
following:
■ Number of staffed agents
■ Number of available agents
■ Time-of-day/day of the week
1. goto step 10 if staffed-agents in split 3 < 1
2. goto step 10 if calls-queued in split 3 pri m > 30
3. queue-to main split 3 pri m
4. announcement 1001
5. wait-time 20 seconds hearing music
6. route-to number 5000 with cov n if unconditionally
7. announcement 1002
8. wait-time 20 seconds hearing music
9. goto step 6 if unconditionally
10. route-to number 5001 with cov n if unconditionally
11. busy