AT&T 555-230-520 manual Two Switch Configuration, Sending Switch Operation

Functions and Examples

Two Switch Configuration

Look-Ahead Interflow is enabled through the use of call vectors and their associated commands. For a two switch configuration, these vectors are included in both the sending switch, which processes vector outflow, and the receiving switch, which processes vector inflow. The Two Switch Configuration for LAI is illustrated as follows:

INCOMING

CALLS

SENDING SWITCH

MAIN

SPLIT

ISDN - PRI

PRIVATE NETWORK

RECEIVING

SWITCH

BACKUP

SPLIT

Figure 8-1. Two Switch LAI Connections

Sending Switch Operation

The vector(s) in the sending switch use the goto command to determine whether the call should be sent to the receiving switch. Recall that the goto command tests various outflow threshold conditions (such as number of calls queued). If the expressed condition is met, a branch is made to the appropriate route to command. This command sends the call to the receiving switch, which, as already noted, can accept or deny the call.

Issue 4 September 1995 8-3