Table of Contents
Advertisement
SECTION 4
TESTS
OVERVIEW
This section describes the tests that can be performed with the DataComm
551 after installation, whenever the operation of it must be checked, or
when problems in the data communications system must be isolated (see
Figure 4-1). Some tests prevent normal operation of the CSU and should be
performed only when the CSU is not in use, while others have no impact
on operation and can be performed anytime. Some tests utilize a mini-
mum of the CSUs' circuitry, while others utilize a maximum. Knowing
this helps in analyzing the results of a series of tests to determine the
probable source of errors. Each test is described in detail in the following
pages (see Figure 4-20 for a summary of the tests available). The tests are
grouped and presented as follows:
DS1 Loopback Functions
• DS1 Line Loopback Function
• DS1 Network Interface Loopback Function
• DS1 Test Loopback Function
DS1 Diagnostics
• DS1 Line Loop
• DS1 Local Test
• DS1 Local Test with Self-Test
• DS1 Network Interface Loopback
• DS1 Network Interface Loopback with Self-Test
• DS1 Remote Test
• DS1 Remote Test with Self-Test
• DS1 Self-Test (including DS1 End-to-End Self-Test)
• DS1 Test Loop
DS0 Diagnostics
• DS0 Circuit Delay Measurement Test
4-1
Advertisement
Table of Contents
