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Functions and Examples
Issue 4 September 1995
8-11
Step 1 of this vector checks the inflow threshold. If the inflow criteria are
acceptable, the vector flow drops to Step 2, where the
queue-to main split
command provides acceptance to the sending switch. Thereafter, Steps 3
through 5 provide a typical queuing-wait scheme.
If, however, the inflow criteria are not acceptable, a branch is made to Step 6.
The
route-to
command in this step checks another switch enabled with Look-
Ahead Interflow on a “look-ahead” basis. If this “far end” switch rejects the call, a
denial message is relayed back to the sending switch, which then drops the
Look-Ahead Interflow call attempt. On the other hand, if the far end switch
accepts the call, an acceptance message is relayed back to the sending switch.
Note that no ringback is provided in this tandem switch vector. This is necessary
so that an acceptance message is not returned to the sending switch. This
operation is appropriate for the caller because the sending switch has already
returned an announcement before a Look-Ahead Interflow attempt is made to the
receiving switch.
Be sure the sending switch is not used as a backup location for the tandem
switch or for any of the far end switches. Should the sending switch be
administered in this manner, all trunk facilities could be tied up by a single call.
Far End Switch Operation
The far end switch is also unaware that tandeming has taken place. The far end
switch functions in the same manner as the receiving switch within the two switch
configuration.
DNIS and VDN Override in an LAI Environment
Look-Ahead Interflow handles Dialed Number Identification Service (DNIS) and
VDN Override in various ways, depending on a number of different
characteristics relevant to the call. Recall that DNIS (described in Chapter 3)
allows any agent with a display-equipped voice terminal to receive visual
displays that specify the name of the called VDN. Also recall that VDN Override
in its basic form (as described in Chapter 3) allows the name of a subsequently
routed to VDN to be displayed to the answering agent instead of the name of the
originally called VDN.
The following sections discuss how Look-Ahead Interflow handles DNIS and VDN
Override.
Answering Agent’s Display
For Look-Ahead Interflow, the DNIS name (the “called” VDN name from the
sending switch) is presented on the answering agent’s display on the receiving
switch if all of the following are true:
■ Look-Ahead Interflow option is enabled