sundance-communications.com/forum Forums General General Telephone & Systems Information release supervision from telco

How do I prove to telco that they are not sending me release supervision on loop start lines. When calls hit voice mail the lines get busied out after the "please hang up and try your call again recording". I played around with the hold abandon timer ( 600 ms. default)which didn't make much difference.

Sounds to me like the line is going "high and dry" which usually occurs if there is a high resistance short across the pair (roh).Is this happenning across all lines or just one? If its just one then try switching ports to see if the trouble moves.
Sincerely, One pissed off, near retirement, over worked (verizon), technician... Thanks Mitch!

One more thing I would try is to put a banjo clip in line with your line ports and monitor with a volt meter and see what happens when your switch drops the calls.You should see 48 to 52 volts.If not unplug your switch,then if you get the aforementioned voltage the problem is in your switch.

This is a common problem when using Voice mail system with loop start lines.
In most areas of the country the LEC's do not provide disconnect recognition on loop start lines.
In most cases you will get an open (150-300 MS) in about 30-45 seconds after the distant end hangs up and the CO recognizes that the distant end has disconnected.

This is really a time out from the CO for dial tone time out.

When programming your voice mail always have your options set so that when the party is through leaving a message that it hangs up and disconnects.


DJ

In some cases though, where a Siemens co switch is used any errant line condition is met with "make busy" after a pre determined amount of time has elapsed.This is to ensure the subscriber, in cases of hml, will not lose calls. If no hml is involved the caller is met with an intercept message. John.

What is your integration between voice mail and the switch? Some third party VM's need to see a special disconnect signal from the switch. You may have already checked this but your post doesn't give the specifics on the switch & VM so it can't hurt to double check.

Its a comdial dx-80 w/built-in flash AA/VM. The problem happens on all 4 lines. I just installed an identical system yesterday 30 miles away and it works fine. The old Avaya system didn't have voice mail. I called Qwest already. Hopefully won't be the over-worked, under-paid, close to retirement and pissed off guy previously mentioned. Thanks !

[This message has been edited by bikechuck (edited May 19, 2004).]

Well since its a key voice product then there are some things you can set in the Vmail that will help on the lines staying tied up.

1. If you are using Auto attendant feature, in box 800,801,and 821 make sure you set the field for no digits dialed to hang up. This helps when people call in and just hang up. The best way is to force the caller to dial a digit to do something and then when people call in and just hang up this frees the lines.

In mailbox programming on second page set the option on "After leaving messaage" to hang up. This will disconnect the lines after the callers leave a message and just hang up.

Also in the technical information page set the number of seconds of non silence to at least 15 so if you do get a dial tone or a recording that it will hang up.

DJ

I had the same problem on a DX80 w/a 4 pt flash vm. I installed the system and everything was fine, CO's and all. 6 months later they decided to add another CO line. The new line was the only one that gave me trouble. The line was having the same problems as bikechuck described and everything was programmed correctly. I went back and forth with telco repair for about two weeks. All of a sudden the problem wasn't there anymore. I think that the telco was just overlooking something then finally realized what is was.

Qwest showed up and the guy was older than me ,verizon and many other co vet. Took an hour to prove they had a problem but they never really fixed anything.The lines have moved three different times thru 3 different CO's in the last 9 mos because of business relocation and they were missing the caller ID. I had a good time chatting with the telco guy even though the problem wasn't resolved. I am going to try changing the technical VM fields. I didn't notice much change after changing the mailbox parm. hang -up after message is left. I think the annoying message telling the caller to wait for other options after leaving the message is still there.

Boy, there's a lot of stuff there--that also has just happened to me. February we installed a new DX-80 with 4 port flash. The first two lines are answered immediately by the VM..the other 3 lines on system are NH---being used for outgoing and also "special" lines that ring directly to certain phones.
First line had call forwarding on it from LEC TDSMetroCom --they came in with a frac T-1 and split off 5 lines for voice--the rest for the internet access of the customers computer network. The first day customer call forwards the first line to an answering service--but ALL lines got forwarded. After 2-3 weeks--they got it fixed, and I got them to take of "courtwsy burst." But on our equipment side---the VM 4 ports would become all busy. With my buttset in monitor mode on the first line I could hear background dial tone--then the VM says the 800 greeting...then stops---then dial tone. On my laptop hooked up to the VM, I could see the ports answering one by one. For 2 months we have programmed everthing we possibly could think of --both in the VM and in the phone system. Comdial sent a new CPU. Nothing seemed to help. Almost every day--betweeen 9:30 & 10:30---then about 1:20--to 1:45---I would get a call that the system was "locked up" Always--after they had canceled the call forwarding. A system reset would fix it until the next time. I finally caught it doing it when I had my buttset on line 1. A call would come in normal like--braaack-------braaaack. But this one rang in like this--braaack, braack, braack, braack,.. braack braack BRAACK----then the VM went crazy and all 4 ports began answering in sequence. The LEC sent a tech out and he replaced a module in the channel bank...and I replaced the DX-80 cabinet and CPU. It's been 2 days now. I hope it's over. The bad part is---I still don't know for sure what it was. Siemens switch at the CO. Comdial tech has said that they have had some trouble with Siemens switches/DX-80's on the East coast. I'm wondering if there is an earlier version of the main cabinet/mother board...that has a problem with Siemens switches. The LEC people will never admit to anything. They monitored the T-1 for a while but "everything was fine". One of the CO techs mentioned that there was a "modem" sound right after it rang our system--and he asked if that was a VM signal. I just sort of rolled my eyes and said "no--that's YOUR Caller ID data string."
Go figure.

This is another reason why I wont sell Comdial anymore.

The DX-80 is a Tawainese import and has so many bugs in the hardware its just plain silly.

It is possible that the CO may have had some kinf of Distinct ringing set up on the DN at the CO and didnt know it, also the DX-80 with its Hardware and Software roots from the cheap end of the far east, we will probably see many more problems with this cheap answer from Comdial for replacing the DSU series.

DJ

I havn't had any real hardware problems with the dx80. I think that with the software upgrades its become an excellent system, and for the price it can't be beat.
I also think that comdial isn't the only company manufacturing overseas. Don't let the 'made in USA' fool you. It just means that it was assembled in the US. Using foriegners in any business is the cheap way out for alot of companies that want to increase their profits. Its a shame, but its reality.

Answerring from a CLEC standpoint. If they are using a DMS, make sure option COD (Cutoff on Disconnect) is provisioned on the lines (normally sends 800ms Open Battery), if 5ESS make sure Special Feature 515 is turned on Office Wide. What type of channel bank if any does your LEC have at the prem. If a Adtran 600 series module, they have new Firmware where disconnect supervision can be lengthen the same way as Vina CBs can.

Also, the DX-80 / 120 is assembled in China, not Taiwan. Most of the ICC's you find in a DSU were made in Taiwan...