Figure 9. Flowchart For Using Loopback In Troubleshooting - Canoga Perkins 3240S User Manual

Start
Set Local mux to Local
loopback
No
Data
loops?
Yes
Set Local mux to
Remote loopback
No
Data
loops?
Yes
Connect fiber jumper between local Rx
and Tx, then set MODE switch to NOR
No
Data
loops?
Yes
Check received optical
power at local Rx
>/= lowest
power value?
Yes
Check transmitted optical
power at local Tx
>/= lowest
power value?
Yes
Check received optical
power at remote Rx
>/= lowest
power value?
Yes
Replace remote mux

Figure 9. Flowchart for Using Loopback in Troubleshooting

EdgeAccess
Tests local I/O ports
and most of Local mux
Replace local mux
Tests Local mux, fiber, and all of
Remote mux except I/O ports
Replace remote mux
Tests Local mux, up to fiber
Replace local mux
Values for lowest received power:
850 nm: -33 db
1310 nm HI pwr/1550 nm: -32 dB
1310 nm LO pwr: -24 dB
No
Check transmitted optical
power at remote mux Tx
No
Replace local mux
Values for lowest transmitted power:
850 nm: -21.5 +/-4 db
1310 nm HI pwr: -14 +/-2 dB
1310 nm LO pwr: -24 +/-2 dB
1550 nm: -32 +/-2 dB
No
Replace remote Rx fiber
Values for lowest received power:
850 nm: -33 db
1310 nm HI pwr/1550 nm: -32 dB
1310 nm LO pwr: -24 dB
3240S Fiber-Optic Multiplexer
Values for lowest transmitted power:
850 nm: -21.5 +/-4 db
1310 nm HI pwr: -14 +/-2 dB
1310 nm LO pwr: -24 +/-2 dB
1550 nm: -32 +/-2 dB
No
>/= lowest
Replace remote mux
power value?
Yes
Replace local Rx fiber
4-5