Old school
While you may feel this way, and it was a residential marketing failure in the US; where it is used, it's a major success. It does things POTS never could. One is deliver clean solid audio over 40 Kft of crap OSP that Verizontal can't/won't keep balanced. Another is deliver multiple DN's over a pair.
Actually ISDN is the same just about anywhere.
ISDN is far from the same everywhere. While you are correct that there are 3 flavors in North America; they are wildly different from the EuroISDN protocol. It's not clear to me that the 30 supported (NA) SPID-type ISDN at all; hence my query. _________________________________________________________________ KX-T Mailing list --- http://kxthelp.com/ Subscription changes: http://kxthelp.com/mailman/listinfo/kxt
