RFL Electronics IMUX 2000 - Figure 8-5. Testing an Individual Channel on an In-Service T1 System

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
8.2.8 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 8-5,
you can perform tests on individual channels of in-service T1 systems without affecting the other
channels carried in the same system.
As shown in Figure 8-6, you can perform local loopback test on individual channel modules before
putting an M-DACS multiplexer into service by activating the CM4s Equipment Loopback, or by
establishing a local loopback using a T1 patch cord. However, once a system is in-service, avoid using
T1 loopbacks to test individual channels, because all channels on the T1 circuit carrying the channel
under test will be out-of-service during the test.
T1
CIRCUIT
LOCATION 2
LOCATION 1
ANALOG OR
DATA TEST SET
IN
OUT
VOICE
AND
DATA
CIRCUITS
IMUX 2000
M-DACS
IMUX 2000
M-DACS
VOICE
AND
DATA
CIRCUITS
PATCHCORD /
LOOPBACK PL
UG
Figure 8-5. Testing an individual channel on an in-service T1 system
M-DACS-T1 RFL Electro
nics Inc.
October 25, 2004 8-9 (973) 334-3100