Test Modes; Remote Digital Loopback (Rdl)/V.52 (Ber) - Patton electronics CopperLink 2155 User Manual

Patton electronics copperlink ethernet extender user manual 2155

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4.2 TEST MODES

The Model 2155 has a built-in proprietary loopback test mode, plus a

built-in V.52 BER test pattern generator, for evaluating the communica-

tion link. These tests can be activated from the front panel of the

Model 2155 Ethernet Extenders.

The Remote Digital Loopback (RDL) test checks the communication link

between two Model 2155s.

To use the Remote Digital Loopback tests, do the following:

1. Locate the 511/RDL toggle switch on the front panel of the 2155 and

move it DOWN. This initiates the RDL and sends a 511 pattern into

the loop. If any errors are present, the local modem's red "ER" LED

will blink.

2. If the above test indicates no errors are present, move the toggle

switch UP, activating the 511E/RDL test (with errors present). If the

test is working properly, the local modem's red "ER" LED will blink

approximately once per second. A successful 511E/RDL test will

conﬁrm that the link is in place, and that the Model 2155's built-in

"511" error generator and detector are working properly.

Local 2155

RDL initiated

Figure 8. Remote digital loop

Remote 2155

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