I'm looking into implementing an * solution and I'm expecting to require 4 incoming FXO lines. Based on my reading of the mailing list archives and what I read on the Digium web site, I don't think that this can be achieved with X100P cards as it doesn't seem to be practical to have more than 3 X100P cards at the time (IRQs is the main problem I think). At four FXO ports, I can't quite justify something like a full T1 on a monthly basis. But, since I've never ordered one, I'm thinking that it's a "all or nothing" deal (i.e.: I can't order a T1 and pay for only 4 voice channels). It would seem that the best I can do is a 3x8 configuration according to the information on this page
The Mediatrix 1204 FXO gateway sort of works with asterisk in the US, but have had a few issues with CallerID being recognized when the four pstn lines have different ring cadence (at least I believe its a cadence issue).
Other then that, there seems to be a significant market opportunity for anyone that can produce a reliable 4-port device.
A goggle search for channel banks turned up www.nextag.com with samples such as this: Adtran TA750 Chassis w/psu ac adapter $900 Adtran Quad FXO card: $230 Adtran TA750 w/12 FXS ports: $1250 Adtran TA750 w/FT1, 20 FXS: $1900
However, I don't consider those prices cost effective for four ports after adding in the digium T1 card, etc.
I'm interested in a 4-port as well if anyone knows of something.
See: http://www.welltech.com.tw/
No yet tested, but waiting my first samples next week. Have callerid and reversal polarity detection!. Prices seems to be half of Mediatrix.
Jorge
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