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Door Phone at site that doesn't have IP Office box 1

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Shad0wguy

IS-IT--Management
Nov 2, 2012
58
US
Our second office is getting redone and we will need a doorphone linked to our IP Office system. The problem is that this site doesn't have its own IP Office box. The IP Office is in our main office and is connected to the other site via VPN. We already have a number of phones there so we know this method works. From my searching most doorphones require a direct connection to one of the analog ports on the actual IP Office. I have seen a few that are ethernet based and act as a SIP extension. Would these work with our system configured the way it is? I've used SIP over VPN for polycom phones, so I know that works, but I haven't worked with doorphones on IP Office before, so I don't know if it will work the same way.
 
We use these and we are happy with them, hardly any failure the last two years and they are not expansive as well.
 
Patton makes SIP gateways that are compatible too, probably less expensive than the Multitech, but the multitech does work fine - with either one you'll need a third party SIP station license.

New England Communications
 
So these SIP gateways basically take a SIP endpoint and converts it to analog?
 
Yeah. The SIP gateway registers as a SIP endpoint to the IP office and you get an analog port out of it.

FXS, you can plug an analog station into it and receive dialtone - the ATA is registered as a SIP station.

FXO, you can plug a CO/POTS line into it for dialtone - in this instance you would configure a SIP line to it from the IP Office.

Some of the ATA's out there can do either/or, and some are specifically one or the other - make sure you pick the right type!



New England Communications
 
If you think about it, that's really what any IP phone does - converts the IP traffic to analog (the handset)

New England Communications
 
Stupid to use a ATA, multiple point of failure is not advisable.
More boxes means more possible trouble.
Just buy a ful SIP doorphonwe, there are a lot around.
 
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