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Troubleshooting
9-25
9161-A2-GH30-30
April 1998
Repeater Loopback
The Repeater Loopback (RLB) loops the information to be sent over the Network
or DSX-1 interface back to the device. The RLB loops the entire data stream,
which includes data on the interface, as well as the synchronous data ports. Use
RLB to ensure that all of the data is correct up to the point where it is sent out
over the interface.
H This helps to indicate that the T1 access unit is operational.
H An attached device or test equipment should generate and monitor data to be
looped back.
RLB
496-15199
Network
Interface
DSX
Port
AIS
DCE
Port 1
DCE
Port 2
Framer
The T1 NAM will not respond to any messages from the network during this test.
The following tests cannot be running when a repeater loopback test is initiated:
H Payload Loopback on this Network or DSX-1 interface
H All loopbacks on any other T1 interface (DSX-1 or Network) with DS0s
assigned to this interface
H Send Pattern Test on this Network or DSX-1 interface or any data port
assigned to this interface
H Send Remote Line Loopback on this Network or DSX-1 interface
H Send V.54 or Send FT1 Loopback on any data port assigned to this Network
or DSX-1 interface
H Data Channel Loopback on any data port assigned to this Network or DSX-1
interface
CAUTION:
Repeater Loopback may affect the operation of the FDL, DDL, or EDL.
Any IP data being sent while this test is active will be disrupted. Also,
any performance statistics being sent over the EDL will be disrupted.