Your referring to a DVAC line, this is digital direct connect to the monitor company. This is not that.

It is bell services. Yes, you can plug in a standard analogue phone to is and make it work. The issue is that the local loop has some digital qualities to it. Just trying to figure out what those are.

The mailing machine in peticular looks for squelch on the lines. And I believe that over fxs to voip this is an issue. just wondering if that is the same with bells Local Loop offering.


On 5-Mar-09, at 5:40 PM, Douglas Pickett wrote:

Dean,
To me at least an analogue line is the traditional home telephone line - if you can plug a regular home telephone in and get a dialtone, that's it.

Some alarm systems - to my understanding usually places like banks or jewellery stores - have a special service (I don't recall the official name) which is an always open connection from your alarm panel back to a receiver at an alarm company with a continuous heartbeat to overcome the possibility of someone just cutting the line. These don't have dialtone.

Assuming that you have just an ordinary PSTN analogue line, is it possible that the line is also being used for a DSL service? If you don't have a suitable line filter to block the high frequency DSL information I could understand that there would be issues with devices like alarm panels, fax machines, and such.

Some DSL services are delivered on a dedicated local loop - ie a pair of copper wires from your premises back to the nearest CO - that does not try piggy-back regular voice service on the single pair of copper wires.

Hope this is helpful.

Regards,
Doug.


----- Original Message ----- From: "Dean Yorke" <[email protected]>
To: "asterisk Mailing" <[email protected]>
Sent: Thursday, March 05, 2009 4:29 PM
Subject: [on-asterisk] alarm systems


Hi All,

I know that this might be a little off topic but.......

Wondering if someone can help me understand the difference between an analogue line and a local loop line from bell.

we have a couple pieces of equipment, (pitney bowes mail machine and personal install alarm system) that are having issues communicating on these lines.

Thanks


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