Harris Intraplex STL-160 Series, Installation & Operation Manual

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6-Testing & Troubleshooting ACS-160 Series & STL-160 Series T1 Mux Installation & Operation
Version 2.11, August 2011
Harris Corporation 6-15
Intraplex Products
6.5.3 T1 Test Equipment Use with Out-of-Service Tests
This section describes the use of T1 test equipment to test T1 facilities on an out-of-service basis. The
tests described in this section can only be performed when you have access to a full end-to-end T1
circuit. If you have fractional T1 service, you cannot perform these tests.
For compatibility with all carrier networks, the test equipment must be capable of generating framed
T1 signals. If possible, use a QRSS (quasi-random signal source) test pattern. Your test set manual
gives setup requirements.
Figure 6-7 shows that out-of-service tests you can perform by plugging a test set into the T1 circuit at
location 1 and sequentially activating these two different loopbacks at Location 2:
● Line loopback in the ACS-160 multiplexer to test the both the facility and the connections between
the CSU and the multiplexer
● Payload loopback in the ACS-160 multiplexer to test the facility, the connections, and the CM-5RB
module in the location 2 multiplexer
Figure 6-7. T1 Circuit Out-of-Service Testing
6.5.4 Analog or Data Test Equipment Use with Channel Tests
This section provides general principles for testing individual payload channels. Each specific channel
module manuals give channel test procedures for that module.
Test individual channels using the appropriate analog transmission measurement sets (TMS), digital
bit error rate test sets (BERTS), and other related types of test equipment. You can perform tests on
individual channels of in-service T1 systems without affecting the other channels carried in the same
system.
Figure 6-8 shows a typical end-to-end data channel test. If the data channel module at location 2 has
an internal loopback capability, activate that loopback to perform the test. If it does not, use a
loopback plug connected to the module adapter for that module.