Harris Constellation - Chapter 4, Loopback Testing; Introduction; Precautions

Harris Corporation Constellation™
LOOPBACK
TESTING
C HAPTER
4
LOOPBACK TESTING
Introduction
The following loopback tests can be performed through the Keypad.
• Local electronic IF loopback for fault isolation
• T1 local and remote loopback tests
• DS3 local and remote loopback tests
• OC3 local and remote loopback tests
The following tributary BER test can be performed through the Keypad.
• T1 loopback with a built-in pseudorandom generator/receiver
Precautions
A DS1 or DS3 loopback test disrupts traffic only on
that tributary under test.