Testing
6-7
7970-A2-GB20-00
August 1999
DSX-1 Repeater Loopback
DSX-1 Repeater Loopback loops the signal being sent from the data port back to
the data port. In a T1-to-V.35 Repeater Loopback, the data signal is also sent to
the DSL port; in a T1-to-T1 Repeater Loopback, an Alarm Indication Signal (AIS)
is sent to the DSL port.
Activating the DSX-1 Repeater Loopback test causes the Embedded Operations
Channel (EOC), used for management, to be lost to the remote unit.
CAP
DSL
Port
DSX-1
Port
CAP
T1
LIU
Framer
Framer
Transceiver
99-16111-01
AIS
T1-to-T1 Repeater Loopback
CAP
DSL
Port
DSX-1
Port
CAP
T1
LIU
Framer
Framer
Transceiver
98-16111
T1-to-V.35 Repeater Loopback
"
Procedure
To run a DSX-1 Repeater Loopback:
1. Position the cursor at the Start command next to DSX-1 Repeater Loopback
on the Network & DSX-1 Tests screen.
2. Press Enter.
The Start command is changed to Stop.
3. To manually stop the test, verify that the cursor is positioned at the Stop
command and press Enter.
A DSX-1 Repeater Loopback cannot be started when any other Loopback test is
in progress.
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