[VoiceOps] SIP Compatible Door Phone

[Tim Donahue]

Hi all,

We recently got a requirement from a client that needs a door phone
that will work with the SIP PBX that we recently installed.  I came
across the product below for a SIP door phone from Valcom, but I can't
find any documentation on Valcom's site.

http://superphonestore.com/product_info.php?products_id=7279&cPath=364

Does anyone have good experiences with a door phone that works well
with SIP PBX's, preferably with some decent documentation on the web
and native SIP vs. using an FXS or FXO and connecting to an analog
door phone.

Thank you,

Tim