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#644203 01/29/23 04:03 PM
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We have NEC DS2000 4-slot system and I was hoping someone here could help with it. I installed the system about 12 years ago and it has worked flawlessly up until a few weeks ago. We have 3 lines coming into the system. It has Intramail, caller id, music on hold, and 4 station phones. The cards installed in the system are an 80005C power supply, an 80025B CPU w/daughter board and 4-hour Intramail, an 80021A 16DSTU station card, and an 8-port analog trunk w/caller ID daughter board. Only the first port on the station card and trunk card are connected.

A few weeks ago, callers began reporting that the calls were cutting out on their end. In other words, they were not able to hear everything we were saying, the audio being transmitted to them was skipping intermittently. There were no issues with reception on our end. The problem seems to be getting progressively worse but is still intermittent. I can call into the system sometimes and it will not do it at all. Other times skips badly.

I replaced the power supply and CPU with refurbished cards. I also tried using different ports on the station and truck cards. None of that helped. I can reproduce the issue by placing the inbound call on hold, the caller is played the music on hold, which cuts out intermittently. It also does it on active calls at all stations, on all 3 lines, and when the caller is listening to a message on the Intramail system. Again, it doesn’t do it every call.

We had the phone company out to check their end right after it first started and they said everything was fine. But they were not able to reproduce the issue and at the time it very sporadic. Now it’s worse and easier to reproduce, so I intend to get them back out just to make sure it’s not on their end.
Any of you guys had this problem or have any ideas what it may be?

We intend to upgrade to a VOIP system soon, but we are a bit overwhelmed with the options and not sure which direction to go yet to get the features we need. So we’re hoping to continue using this system until we figure that out.

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KoolBreeze #644205 01/29/23 05:34 PM
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I hate to break it to you but your carrier is probably the issue. You need to hook up these lines a regular phone and test it. You are probably getting your lines from an EMTA or IAD converted to POTS right?

Coral Tech #644206 01/29/23 06:10 PM
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Originally Posted by Coral Tech
I hate to break it to you but your carrier is probably the issue. You need to hook up these lines a regular phone and test it. You are probably getting your lines from an EMTA or IAD converted to POTS right?

Thank you for the response. I'm suspecting you are correct. I'm not sure about the system on their end. Up until a year or 2 ago (I think, time flies) we still had POTS into the office where the system is installed. ATT upgraded their end to fiber. I'm not sure what all that involved or how they are doing it. We did not make any changes on our side of the of the system though.

I just read a blog post on atcom's website that talks about upload speed issues with VOIP systems and it's almost the same as what we are experiencing. I'm wandering if there is more demand on their end than their system can handle?

I will see if I can locate a phone and connect it to test the lines. Thank you for the help.


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