I have used the Valcom VIP-172L to connect to several Asterisk servers. It is easy to program and registers with no problems. The nice part is that it is PoE and true SIP so there is no analog interface required. There is also an integrated relay for door opening. Nice unit.

I just bought the viking e-20a door phone and ran the lines to a 24 port Rhino FXS Channel Bank. Once those were in place I configured the /etc/zaptel.conf for that channel to have fxoks signaling. Then configured the /etc/asterisk/zapata.conf with a context specifically for the door phones, and again with fxo_ks signalling (the *k* is necessary for the remote hangup to register to the door phone). Set the power down option for the channel on the fxs channel bank for 1 second. In /etc/asterisk/extensions.conf create a context that's first priority is s,1,Dial(whatever you want). You're good to go after that! I highly recommend this option, as it's very quick and easy to set up!

If you just want a door phone, try the Viking E10 (linked above) and hook it up to an ATA programmed to dial when off hook.
If you need to open doors (strike plates), use the C-2000 controller along with an FXO port (IE digium x100p clone) and you are all set. Using this system, you get caller id into * (it tells you which door box is calling) and once the you pick up you can let them in by pressing **. You can also 'dial' out to the C2000 (dial(zap/1) w/out a number) and then connect out to each doorbox to manually listen in to any door box and even open the door if somebody is there. You can also dial a code that will click on the door box relay and leave the door unlocked until you turn it off.
The C2000 provides CO outputs (FXS ports) to the door boxes, which the E10 uses. When you push the button on the E10, it goes off-hook and the C2000 rings its output which goes into *. You can program the C2000 to accept DTMF codes from the doorboxes to open the door, so you can usefully use doorboxes with keypads.
Overall it's a bit expensive (esp. the C2000, its a few hundred $) but it's very flexible and works great for up to 4 sets of doors/phones. My only complaint is that the incoming audio (guy outside talking) from the E10 is a bit muffled. It is still quite understandable/usable however, and I highly recommend this setup.

I bought the setup for my last install at http://www.ppcsonline.com and they were very helpful. Looks like a cheesy electronics place but they are a viking distributor or reseller or something.

Has anyone managed to successfully implement the Doortello with Asterisk using either an ATA or the IAXy. If yes will you please give me some info/assistance on doing the same.

I purchased a globaltech fonelinq to use as a doorphone. It has both fxs and fxo ports. I plugged the fxs port into the "line" plug of an SPA-3000 and configured Asterisk to dial a ringgroup when it rings. It has 2 relays, which can be used to unlock two different doors, or the second relay can be used to run a doorbell as well. dial 04 to open door, 08 to open second door.

see - http://www.globaltechcorp.com/GBP/Products/doorphone.htm

(:wink:)

Some one who has the experience or the notes, please write:

"HOWTO ring phone, using custom ring, on doorbell ring"

for the rest of us who want to tear-out & throw-away our 1970's style wooden cheesy wall-hanging unit.

Thanks.

Jason
icq:5579183

Universal Doorphone Interface
Door Units - Telephony
100 Speed Dialling Numbers, from 1 to 99 Push-Buttons, ...
Programming by the Telephone Line
Programming by PC

http://www.e-lynxx.be/gb/file/alfa+11uk.pdf