On Mon, Jun 23, 2008 at 09:44:47AM -0500, Jerry Jones wrote:
> Actually CLASS MWI, ie FSK, is a standard feature of Telco COs.
>
> It may be used with stutter, they are not exclusive, check with Verizon.
>
> I designed and manufactured these 20 years ago and Kevin is correct
> it uses same technology as CallerID known as CLASS. The analog
> styles, which I also designed and manufactured, are only found on PBX
> systems. There are several flavors that all signal based on some
> voltage mechanism.
Well, not to pick a nit or anything...
CLASS stands for Custom Local-Area Signalling Services, a name applied
by (I think) Bellcore to a collection of New Added Spiffiness that
started appearing on phones in the early 80s when the switches started
to go digital.
It's used (IME) as an umbrella term to describe a bunch of stuff:
R.E.M's favorite, '*69', is called a CLASS code.
CNID is a CLASS service, as was MWI.
Distinctive ringing is a CLASS service.
These services were define by various publications in Bellcore (now
Telcordia)'s LATA Switching Systems Generic Requirements, FR-64, a spec
document that RBOCs and CLECs bought and used to write RFPs for class-5
switches to switch makers who also bought them and used them to spec
and build said switches.
Last I looked it came in about 18 binders, and cost something like $15k
to buy (er, excuse me: license).
No, no educational discounts, (damnit :-).
If you're the sort of geek who enjoys this stuff, there's a list here:
http://telecom-info.telcordia.com/site-cgi/ido/index.html
Cheers,
-- jra
--
Jay R. Ashworth Baylink [EMAIL PROTECTED]
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com '87 e24
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
Those who cast the vote decide nothing.
Those who count the vote decide everything.
-- (Joseph Stalin)
_______________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
AstriCon 2008 - September 22 - 25 Phoenix, Arizona
Register Now: http://www.astricon.net
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
