Phone Systems

Previous Thread
Next Thread
Print Thread
Rate Thread
TDA-50G Dropping Calls
#570639 04/22/14 12:36 PM
Joined: Jan 2005
Posts: 15,216
Moderator-Vertical, Vodavi, 1A2, Outside Wire
*****
OP Offline
Moderator-Vertical, Vodavi, 1A2, Outside Wire
*****
Joined: Jan 2005
Posts: 15,216
We were hired by a friendly competitor to help him figure out why a Panasonic KX-TDA50G keeps dropping calls in progress. It also randomly drops calls that are on hold. There are many more details to this story, however:

1. The original system there was a KX-TAW848 with 7731 phones that began doing the same thing, so the guy replaced the KSU with another 848, but the problem persisted.

2. He then replaced the 848 with the 50G and the problem still remained.

3. Upon our advice, he installed Sandman's loop current regulators on the CO lines but they had no effect.

4. We have never been able to re-create the problem while on site, but several of the staff there have told us that they will be in the middle of a call, they will hear a click and then the system returns a reorder tone. This leads me to believe that they system is doing exactly what it is supposed to do; responding to a momentary open loop on the line and releasing it.

5. Verizon has supposedly changed the cable pairs to the building, in fact they were there during one of the visits that we made.

6. There is no noise or static whatsoever on any of the lines. I am starting to lean toward the fault being on one specific line, maybe the second or third one since the problem is so sporadic. I really don't think that there is anything wrong with the system or the wiring.

7. The serving central office is a 5ESS (ARTNVAARDSO). I would like to demand that Verizon change out the office equipment for this customer, but in order to get them to do so, we have to exhaust all other avenues.

Any ideas? I'm up against a brick wall on this one.


Ed Vaughn, MBSWWYPBX
Panasonic Equipment and Telephones
Re: TDA-50G Dropping Calls
EV607797 #570640 04/22/14 02:48 PM
Joined: Jul 2006
Posts: 2,531
Moderator-Panasonic
***
Online Content
Moderator-Panasonic
***
Joined: Jul 2006
Posts: 2,531
Probably would be fairly easy to pick a line and monitor its voltage. You can get recording meters fairly inexpensive. You almost have to believe it's the telco, or did Panasonic make 3 phone systems that just randomly drop calls?

With DC voltage monitoring, you'll see the 48, 8 and 0 volts being reached, but you'll probably have to match it up with the SMDR and dropped call log. https://www.mcmelectronics.com/product/72-10405?scode=HMP219


Carl




There's no place like 127.0.0.1

Moderated by  Carl Navarro, OBT 

Link Copied to Clipboard
Forum Search
Most Recent 5 Post
Handset can call out, but not receive calls
by WildBill - 08/06/20 06:01 PM
Abandoned/Obsolete Armored Copper Drop.
by dexman - 08/06/20 12:10 AM
NEC Cordless Phones
by teldata1 - 08/05/20 09:31 AM
SV9100 Call forwding to voice mail
by teldata1 - 08/05/20 09:24 AM
Help!! Mitel 200 ICP mailbox 0 being hacked
by EPearson - 08/04/20 09:16 PM
Who's Online Now
35 members (gertter, justbill, LoonCreek, Keyset6, JBean3329, mbhydro, Ruben, NateBates, PortlandTech, nortelvoip, pvj, Professor Shadow, Rok1215, hbiss, Bob3470, BobRobert, Carl Navarro, RonP, RATHER BE FISHING, newtecky, Touch Tone Tommy, jlspeck, KRRath, teleco, gelehu, Yoda, Iwatsu Guru, iatech3800, vicbob, metelcom, dexman, teldata1, Skunky, morephones, bmerri19), 592 guests, and 69 robots.
Key: Admin, Global Mod, Mod
Popular Topics (Views)
Forum Statistics
Forums94
Topics93,864
Posts636,741
Members49,329
Most Online5,661
May 23rd, 2018
Today's Birthdays
newbieadmin, redshift, tricki0702
Newest Members
bmerri19, Henry VIII, jmontler, barryv, carag62
49328 Registered Users
Get Tech Support Now! Click the banner below
Get Tech Support Now!
EMP & Lightning Home Surge Protection
EMP - Click Here!
Top Posters (30 Days)
dexman 38
Ruben 20
DonaldR 17
hbiss 16
Bluewater Sailing
https://www.patreon.com/bePatron?u=5256033
EMP Shield for Commercial - Home & Vehicle
Use Coupon code SAVE - Click Here!
Servpro Ventura 24-Hour Emergency Service
Free Estimates call us now 24Hours
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2020
Trusted Partners