sundance-communications.com/forum Forums General General Telephone & Systems Information VONAGE LINES

I think this was stated before, but I can't seen to find where. Does Vonage have loop supervision disconnect. If not, what voip company does? I have an NEC DS1000 and whenever an automated recording calls in it always busies out the port. It sucks that we always have to restart the system to clear it up.

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| Telephone Systems | Voice & Data Cabling

I asked the same question a while back, Most said it will work. I called Vonage and they told me that it would not work. Couldn’t get an exact answer as to why. I assumed the disconnect signal was the reason. But they did say that they are coming out with a module that was specifically designed for KSU and PBX type equipment. Groundstart claims that it works on DS1000/2000 and also states this on his website. Although I would not advertise the DS as VOIP capable! Mitch, no offense. I would like to try myself.

Well I do know on the avaya voice mails it works BUT, at the end of a message you get a busy before it actually hangs up which is very annoying.

Just as a side note, I’ve had a couple of Intramail’s lock up with regular POTS lines. The NEC tech tip 65 about this really does not help (supposed work around). A new revision level will soon be available on the website. I have a version 3.21.06 that will fix the Intramail lockup. Tech support sent some techs 3.21.02, which is really screwy. Another thing that may help is disabling the NCRMB option so the AA doesn’t just Loop! And make the timeout go to mailbox without NCRMB so that the AA will hang up. I assume it works fine with your POTS lines, just not Vonage. Something to keep in mind.

One more thing while I'm on a roll. Instead of resetting the system by means of power down. Use the forced trunk disconnect!!

The only line that gets hung is the vonage line. There is no way I would recommend vonage to any of my phone system clients.
I do have the latest version 3.21.06. I just can't beleive that vonage wouldn't send a disconnect signal. How can they offer to businesses and not have everything working properly.

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| Telephone Systems | Voice & Data Cabling

I think they expect you to use their voicemail not yours.

Even for businesses?

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| Telephone Systems | Voice & Data Cabling

The problem you are having is that by default the Linksys adapters do not send a CPC disconnect signal.

CPC is a reduction of voltage to less than 1 volt for a specified duration after the remote party hangs up. It can also be a polarity reversal instead. The US standard is a 200ms voltage drop. The reason for the signal is to notify hold buttons and PBX's that the remote party has hung up.

On the Linksys boxes, that are of course actually Sipura boxes, the default settings for CPC are a 2 second delay and a 0 second duration. It's that 0 second duration that is causing your problem.

This can be changed, but only by Vonage on the Linksys box since you are locked out of the admin functions. The problem is that no one you talk to is going to have a clue what you are talking about, so you will need to be very specific and very persistent.

First of all, you might avoid using the term "PBX" since that does give the tech support person a good reason not to help as they don't support PBX's. I would suggest that you explain that the hold buttons on your phones will keep the line off-hook after the remote party disconnects. That, by the way, is a true statement so long as you have phones with hold buttons.

Next explain that you absolutely know how to fix this. Tell them that there is a parameter in the Linksys called "CPC Duration". Tell them you would like them to set this to .2 (that's a decimal then "2" for 2 10th's of a second or 200ms). With that level of specificity, anyone at tech support should be able to do it for you. I would also ask them to note what they did in your account and that it solved your problem so that when you add more adapters in the future, you can just have the next tech read the notes.

I've done this on 3 linksys adpaters successfully so you should have no problem. By the way, I did use the "PBX" word and it was almost a deal killer at the start. Fortunately I was having issues with hold buttons at another location, I knew exactly what the problem was and how to fix it, and I got a very helpful tech who was willing to read the articles I pointed him to so he did the deed. Once he had the notes in the account, getting the next ones done was a breeze.


[This message has been edited by gkar (edited March 22, 2005).]