[asterisk-users] Telco MWI with Asterisk 1.6-beta9

[Jay R. Ashworth]

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                      jra at baylink.com
Designer                     The Things I Think                       RFC 2100
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