Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
9.2.6 USING ANALOG OR DATA TEST EQUIPMENT TO PERFORM CHANNEL TESTS
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. As shown in Figure 9-5,
you can perform tests on individual channels of in-service E1 systems without affecting the other
channels carried in the same system.
As shown in Figure 9-6, you can perform local loopback test on individual channel modules before
putting a multiplexer into service by activating its Equipment Loopback, or by establishing a local
loopback using a E1 patch cord. However, once a system is in-service, avoid using E1 loopbacks to
test individual channels, because all channels on the E1 circuit carrying the channel under test will be
out-of-service during the test.
E1
CIRCUIT
LOCATION 2
IMUX 2000
VOICE
AND
DATA
CIRCUITS
PATCHCORD
LOCATION 1
ANALOG OR
DATA TEST SET
IN
OUT
VOICE
AND
DATA
CIRCUITS
Figure 9-5. Testing an individual channel on an in-service E1 system
IMUX 2000E1 RFL Electro
nics Inc.
January 23, 2004 9-8 (973) 334-3100
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