User manual

Testing the System
7-2 Campus-RS Fractional Interface Card User Manual
The following figure shows the Local to Local (1) and Remote to Local (2)
loopbacks.
The following figure shows the Remote to Remote (3) and Local to
Remote (4) loopbacks.
The following sections describe each type of loopback.
Local to Local Loopback
The Local to Local loopback tests the local data port and a small portion of
the Fractional Interface Card.
Use this loopback to verify that the local host equipment, local data cable, and
local interface card are installed and configured properly. The remote host
equipment is not involved in this type of loopback.
HDSL
Data
Port
Data
Port
Remote Unit B
Local Unit A
12
HDSL
Data
Port
Data
Port
Remote Unit B
Local Unit A
43