AT&T 555-230-520 manual Tandem Switch Configuration, Receiving Switch Inflow Vector

Functions and Examples

The following is an example of an inflow vector that might be used by a receiving switch:

1.goto step 6 if calls-queued in split 1 pri h > 5

2.queue-to main split 1 pri h

3.announcement 4000

4.wait-time 2 seconds hearing music

5.stop

6.busy

Figure 8-3. Receiving Switch Inflow Vector

Step 1 of this inflow vector checks the inflow thresholds. The goto step command in Step 1 checks the number of queued calls in split 1. If the number of such calls is greater than 5, a branch is made to the busy command in Step 6. If executed, the busy command denies the call, and the receiving switch returns a call denial message to the sending switch. The sending switch, in turn, drops the Look- Ahead Interflow call attempt and then continues vector processing at the next vector step.

On the other hand, if the number of queued calls in split 1 is less than or equal to 5, the receiving switch returns a call acceptance message to the sending switch, and call control is passed to the receiving switch. Thereafter, the call is queued to split 1 in the receiving switch (Step 2). Once queued, the caller receives the appropriate announcement in Step 3 and is then provided with music until the call is answered by an agent or abandoned by the caller (Steps 4 and 5). (Remember, the stop command halts vector processing but does not drop the call.)

NOTE:

If the sending switch does not receive a call acceptance or call denial message within 120 seconds (G3 switches) or 10 seconds (G2 or network switches) after the Look-Ahead Interflow call request, the Look-Ahead Interflow attempt is dropped, and the sending switch continues vector processing at the next step.

Tandem Switch Configuration

Tandem Look-Ahead Interflow is implemented by using route-tocommands that contain external destinations that route over ISDN-PRI facilities. This configuration is illustrated as follows:

Issue 4 September 1995 8-9