Disconnect supervision

[AlecWaters]

Hi,

We have a Norstar Meridian key system here (a Modular 8/24, I think), which I'm hoping to connect to an FXO port on a Cisco router via an ATA2 box (I want to implement an off-premises extension via IP).

I've been told that the Meridian offers no kind of disconnect supervision, and I'm worried about Scenario 1 as described here:

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800ae2d1.shtml

(watch for URL wrap!)

If there's no disconnect supervision from the Meridian, will my off premise extension on the FXS side of the network (phone B in the scenario) continue to ring if it goes unanswered?

thanks a lot,
alec
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[Arr]

alec,
It would appear so. Go check out the MCK web site. They produce an IP set extender that will allow you to have a single set remoted without the disconnect problems. They may be cheaper than CISCO.
I find it hard to beleive that these router makers advertise VOIP without packet sensed disconnect supervision. This bears much thought and looks like a big stumbling block for implimentation.
No Nortel switch provides a disconnect signal on an analog port. Fighting with that issue now on an M1.

PhM

 

[westcoaster]

Arr Actually there is a card that supports disconnect supervision on the M1. NT1R20AB ops line card. here is the thread I had started on thisthread798-369042

 

[AlecWaters]

PhM,

Thanks for the pointer - MCK's products look pretty good!

The only downside is the cost - a PBXgateway and an EXTender 4000 cost over $4600

Never mind; I'll bear it in mind for future projects.

thanks,
alec
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[salo0920]

Alec,

You can get some MCK stuff at significantly less through ebay.

 

[K2MERLIN]

Try looking at a different kind of ata I have used the Linx ata in the past, it has alot more features than the ata2 and is compatable with the Norstar.

 

[executone]

I would look at the VMI adapter. I believe it has disco. supervision.

Good Luck!!

 

[Arr]

Westcoaster,
Yes I know about the OPX card. Wish the door phone modules and other devices like these routers would think of disconnect supervision too. Cost of OPX card really high. Ecch. But thanks.

PhM

 

[mmazza]

dunt know if this is on the same lines but I use the ATA port on CICS to connect to a Netgear Modem router and it works flawlesly.
Mario Mazza
Telecommunications Specialist