
Configuring FT1 Services
117345-B Rev. 00
8-27
In payload loopback, the signal loops through the T1 framing device before the
received signal is looped back for retransmission. In line loopback, the signal does
not go through the framing device.
Table 8-2. Send Commands for FT1 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 for the window to update before selecting another command.
Comentarios a estos manuales