SYMPTOM
APPENDIX A
TROUBLESHOOTING
PROBLEMSOLUTION
Figure 7. Local and Remote Loopback Test Modes
5.4 POWER-DOWN
LEDs do not light when AC power transformer is plugged into wall
Carrier Detect (CD) LED is low
or
Carrier Detect (CD) LED is high, but
1.Loose power connection
2.Outlet is defective
3.AC power cord is defective
4.AC transformer is not plugged into the Model 1180/35
1.If CD is low, possible synchronization loss
1.Make sure the AC connection is flush
2.Try a different outlet
3.Remove the cord from the outlet and check for continuity
4.Have another cup of coffee!
1.Check for ongoing power loss or break in fiber if CD does not go high within 60 seconds
Turn off the Model 1180/35 by simply unplugging the AC power adapter from the wall. There is no power switch on the Model 1180/35.
1180/35s are not communicating
2. Test Mode switch is | 2. Be sure the Test |
in the wrong position | Mode switch is set to |
| NORMAL on both |
| Model 1180/35s |
3.DIP switches are set improperly
3.Check all DIP switch settings, esp. Reset and Data Rate, against those in Section 3; make sure both 1180/35s are set the same way
4.Fiber link is connected improperly
5.V.35 connections are faulty or cables are pinned wrong
4.Check the ST or SMA connection on the back of both 1180/35s
5.Check V.35 cable continuity and pinning
11 | 12 |
