Black Box COMPACT T1 MT850A - Manual (Page 542)

B-14 Compact T1 - Release 6.1
Diagnostices & Troubleshooting
Loopbacks Overview
V.35 Loopbacks
V.35 Line Loop
Note: V.35 LED flashes green during line loop.
Loop occurs at V.35 port. Check for sync and errors at local data port.
Enable Line Loopback
Where a V.35 card is in slot 6.
> set 6:1 line loopup
OK
T1
Network
T1
Local
DTE
Adit 600
Equipment
Unit
Local
DCE
V.35
Line
Loopback
Adit 600
Network
Unit
Remote
DTE
Remote
DCE
V.54
Loopback
V.35
Equipment
Loopback
Compact T1
Network
Unit Compact T1
Equipment
Unit
T1
Adit 600
Local
DCE
V.35
Loop occurs at V.35
port (location)
Local
DTE
FXS
Telephone
DS1
Network
Compact T1