|
|
|
|
Joined: May 2008
Posts: 523
Member
|
|
Member
Joined: May 2008
Posts: 523 |
I am working on a Comdial DX-80 and the CO lines have digitalish noise on them.
Extension to extension is fine, Extension to VM is fine. All extensions hear noise on CO lines.
(4) lines, (2) 8-port extension boards.
Noise on COs from both stations boards.
Since the CO lines are on the motherboard, would a CO board solve the issue do you think or would the motherboard or bus continue with the line noise?
Basically, if you press a CO line and press a digit so you can hear it better, the lines have a digitally scratchy, whiny rattling noise on them.
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
|
|
Joined: Nov 2004
Posts: 368
Member
|
|
Member
Joined: Nov 2004
Posts: 368 |
Check your voltages on the 4x8 board. If the +5 volts is off by more then .2 vdc or is not steady it needs to be repaired. +5vdc problems are pretty common on these units and its not improving as they age.
|
|
|
|
|
Joined: Feb 2008
Posts: 124
Member
|
|
Member
Joined: Feb 2008
Posts: 124 |
When testing power rails I'd also suggest putting your meter in AC volts mode. If the DC voltage rail has any AC component you know the power supply is malfunctioning.
Jason Perkins
Network Engineer
|
|
|
|
|
Joined: May 2004
Posts: 336
Member
|
|
Member
Joined: May 2004
Posts: 336 |
I'm have the same problem on a customer that has a DX-120, loud on the Mother board CO and barely noticeable on the 4 port CO.
So the consensus is a power supply issue?
|
|
|
|
Forums84
Topics94,402
Posts639,365
Members49,808
| |
Most Online5,661
May 23rd, 2018
|
|
|
0 members (),
308
guests, and
116
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
|
|
