
Configuring MCE1 and MCT1 Services
117021-A Rev. A 7-41
In payload loopback, the signal loops through the T1 framer before the received
signal is looped back for retransmission. In line loopback, the signal does not go
through the framing device.
4. Repeat Step 3 for each test you want to run.
5. Click on Done.
The MCE1 or MCT1 Port Parameters window appears.
Note: Facility Data Link (FDL) loopback command options apply only when
the MCT1 Line Type is configured as ESF for testing. For more information
about FDL loopback codes, refer to ANSI T1.408 ISDN Primary Rate -
Customer Installation Metallic Interfaces Layer 1 Specification.
Table 7-4. Send Commands for T1 Port Loopback
Send Command Function
Loop Up Sends a loop-up code to the remote end to initiate line
loopback. After a minimum of 4.5 seconds, the port loops
receive data back onto the T1 transmit path at the T1 interface.
The line type setting determines the coding scheme.
Loop Down Sends a loop-down code to the remote end to stop the line
loopback condition
FDL Payload Loop Sends a loop-up code to the remote end to initiate payload
loopback
FDL Disable Payload Sends a loop-down code to the remote end to stop the payload
loopback
FDL Line Loop CI Sends a Customer Installation (CI) loopback message
FDL Line Loop IA Sends a CI loopback message, indicating that it originates from
the CSU
FDL Line Loop IB Sends a CI loopback message, indicating that it originates from
the DSU
FDL Disable Line Loop Disables generation of FDL line loopback codes
FDL Disable All Sends a universal loopback deactivate code to stop all
loopback activity
Caution: Wait until the window updates before selecting another command.
Kommentare zu diesen Handbüchern