RFL Electronics IMUX 2000 - Figure 8-2. Using IMUX 2000 M-DACS T1 Loopbacks

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
8.2.5 TYPICAL CM4 LOOPBACK PROCEDURE
The following example shows how to use the loopbacks built into the CM4 to isolate a failure on a
point-to-point T1 system (Figure 8-2).
a. Testing from Location 1 to Location 2.
b. Testing from Location 2 to Location 1.
T1
CIRCUIT
LOCATION 2
CM4
D/I-A or B
VOICE
AND
DATA
CIRCUITS
CM4
EQUIPMENT
LOOPBACK
DSX-1
MANUAL
LOOPBACK
(PATCHCORD
OR JUMPER
CONNECTOR)
DACS
Module
LOCATION 1
CM4
D/I-A or B
VOICE
AND
DATA
CIRCUITS
CM4
LINE
LOOPBACK
DSX-1
MANUAL
LOOPBACK
(PATCHCORD)
DACS
Module
CM4
PAYLOAD
LOOPBACK
T1
CIRCUIT
LOCATION 2
CM4
D/I-A or B
VOICE
AND
DATA
CIRCUITS
CM4
LINE
LOOPBACK
DSX-1
MANUAL
LOOPBACK
(PATCHCORD)
DACS
Module
CM4
PAYLOAD
LOOPBACK
MANUAL
LOOPBACK
(PATCHCORD
OR JUMPER
CONNECTOR)
CM4
EQUIPMENT
LOOPBACK
VOICE
AND
DATA
CIRCUITS
LOCATION 1
CM4
D/I-A or B
DACS
Module
DSX-1
Figure 8-2. Using IMUX 2000 M-DACS T1 loopbacks
M-DACS-T1 RFL Electro
nics Inc.
October 25, 2004 8-4 (973) 334-3100