Specifications

Reference Guide

7-71

WAN Card PARS Screen

7.5.6 Integrated Access Device Functionality

In order to offer PARS feature, the integrated access device will perform the following

functions:

The integrated access device will provide a receive side and transmit side option to voice and

data Channels and WAN time slots. It will differentiate between transmit side and receive side

of each time slot/channel (voice or data). This is done internally and is not visible to the user.

The integrated access device will designate the received side of a link either active or inactive

and the transmit side of a link active or inactive. This is done internally and is not visible to

the user.

7.5.7 Normal Operation - No Link Failure

Any of the WAN lines in a cross-connect integrated access device can be assigned to PARS

mode. Once a WAN (W1-1 for example) is assigned to PARS mode, the other WAN of that

card (i.e. W1-2) will be assigned to PARS by the system and will not be available to the user.

The user assigned WAN will become primary and the system assigned WAN will become the

secondary. The WAN line time slots must be unassigned (and free prior to PARS mode

configuration). Otherwise, the system will not accept the PARS mode. When W1-1 is assigned

to PARS mode, the system will cross-connect all its time slots to the W1-2 time slots. This is

illustrated in Figure 7-48.

Figure 7-48. PARS Time slot Cross-connection between Primary and Secondary WANs

W1-1

W1-2