9 • T1/E1 Diagnostics
Models 2603, 2621, & 2635 High Speed Routers User Guide
94
Operating Remote Digital Loopback (RDL)
standard loop pattern, the IPLink will detect this pattern and place its CSU (T1 interface) in a loop mode.
During this test data sent by the CO equipment will be sent back by the IPLink 2603.
Figure 18. D4(CO) loop
Operating Remote Digital Loopback (RDL)
The Remote Digital Loopback (RDL) test checks the performance of the local, the remote equipment as well
as the communication link between them. Any data sent to the remote unit in the test mode will be returned
to the originating device (i.e, data sent by the local 2603 will be returned by the far end device ).
Figure 19. Remote Digital Loop
To perform an RDL test, follow these steps:
1. Go to the IPLink Main page, select the E1/T1 option. Next, click on Test Modes, select Remote Loop using
the drop down menu, and click on the
Configure and Activate
button to start the test.
2. Perform a bit error test (BERT). See section “BIT Error Rate (V.52) Diagnostics” on page 95. The IPlink
will compare the BER pattern sent against the pattern received and will show errors, if any, detected in the
received stream. If the BER test indicates a fault, you may have a problem with the E1/T1 line between the
modems. You should then check the E1/T1 line for proper connections and continuity.
Summary of Contents for IPLink 2603 Series
Page 8: ...Contents Models 2603 2621 2635 High Speed Routers User Guide 8 ...
Page 14: ...About this guide Models 2603 2621 2635 High Speed Routers User Guide 14 ...
Page 23: ...23 Chapter 2 Product Overview Chapter contents Introduction 24 Applications Overview 25 ...
Page 89: ...89 Chapter 8 Monitoring Status Chapter contents Status LEDs 90 ...
Page 98: ...9 T1 E1 Diagnostics Models 2603 2621 2635 High Speed Routers User Guide 98 Software Upgrades ...
Page 109: ...109 Appendix B Cable Recommendations Chapter contents Ethernet Cable 110 Adapter 110 ...
