|
|
|
|
Joined: Aug 2016
Posts: 1
Member
|
OP
Member
Joined: Aug 2016
Posts: 1 |
Have an ESI 50 system. 3 CO lines being used, using an after hours messaging service. When calls ring on line 1 they go out on line 3. During that time there's a loud feed back sound almost like an echo. Verified all 3 CO lines incoming and outgoing and all is clear. Verified the after hours service line and is clear also. Moved line 3 to line 4 and was clear for a while and started bleeding over to line 2.
Swapped the system for a new one and the feed back seems to have amplified. Checked voltage on my lines and line 1 and 2 have 21 vac and line 3 has 20. It should be 24 vac according to the diagrams.
Am lost and continue researching this issue, any thoughts?
|
|
|
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: Feb 2006
Posts: 1,716
Member
|
|
Member
Joined: Feb 2006
Posts: 1,716 |
OK, first off, if you are an ESI installer, you should know that there is a CO trunk to trunk gain adjustment that can be made.
Second, if you are reading 21 VAC on you lines, you have a serious problem with your LEC or carrier. Normal voltage is -48 VDC.
Third, when troubleshooting a situation as you describe, line loss is what you should be interested in reading. Normal line loss is between -8 and -11 db. At -11 db, you are on the edge of not being able to hear. If your line loss readings are better than -8 db, then you need to cut back on the CO to CO gain.
Rcaman
Americom, Inc.
Where The Art And Science Of Communications Meet
|
|
|
|
Forums84
Topics94,290
Posts638,801
Members49,767
| |
Most Online5,661
May 23rd, 2018
|
|
|
0 members (),
83
guests, and
417
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
|
|
