Testing

Data Terminal Loopback

Data Terminal Loopback (DTLB) loops the user data back to the DTE. This loopback is located as closely as possible to the User Data Port (DTE) interface.

"Procedure

To run a data terminal loopback:

1.Position the cursor at the Start command next to Data Terminal Loopback on the Data Port Tests screen and press Enter.

The Start command is changed to Stop.

2.To manually stop the test, verify that the cursor is positioned at the Stop command and press Enter.

Network Interface

CSU DSU

ALL 1s

DTLB

DTE

Port 1

97-15696

Data Terminal Loopback cannot be started when any other loopback is already active on the data port.

7-8

March 1998

7112-A2-GB20-20

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Image 66
Paradyne 7112 manual Data Terminal Loopback, Csu Dsu