XtendLan XL-GDB series User’s Guide
5.2.3.1.2 FROM REMOTE
The From Remote Loopback menu is used to perform local Loopback tests which would be looped
back toward the remote side. For V.35 interface, there are six Loopback modes for selection:
1.
Disable
2.
NearEndLB
3.
LocalLB
4.
RemoteLB
5.
PayloadLB
6.
V54LB
Note: V54 function in configuration menu must be configured as enable if to proceed V54LB test.
For E1, T1 and Ethernet interfaces, users can only activate five loopbacks where V54LB is not
available :
1. Disable
2. NearEndLB
3. LocalLB
4. RemoteLB
5. PayloadLB For more detailed description about Loopback, please refer to 2.8 Diagnostics
or Appenidix D: Loopback Illustration.
5.2.3.1.3 PRBS Menu
For each STU-C and STU-R, the built-in PRBS (pseudo-random binary sequence) generation and
detection are provided for Loopback performance test. Test results are displayed in the PRBS
screen. Click on “CR” (Enter) to start the PRBS test so that the TST LED of local SHDSL device
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