-=> Quoting Bo Simonsen to Leonard Erickson <=-

 BS> Hello Leonard!

 BS> May 06 19:01 03, Leonard Erickson wrote to Bo Simonsen:
 
 BS>> You're right.. We can calculate it with that method.
 
 BS>> In the US is a B channel 56 kps... because the D channel is shared, 
 BS>> so
 
 LE> Nope. The B channels are 64k *if you are running data over them*.

 BS> Ok, V110L and V120L is running 64k too?

From the nodelist comments:

V110L     ITU-T V.110 19k2 aasync ('low').
V110H     ITU-T V.110 38k4 async ('high').
V120L     ITU-T V.120 56k async, layer 2 framesize 259, window 7,
          modulo 8.
V120H     ITU-T V.120 64k async, layer 2 framesize 259, window 7,
          modulo 8.
 
 LE> For voice traffic *some* trunks use "robbed bit" signalling, which
 LE> means that Voice is actually running at 56k. Same data rate, just *7*
 LE> bits guaranteed available. 

 BS> Ok.
 
 LE> Since a lot of phone companies charged more for data (often with
 LE> charges per "block" of data added on top) folks would just send the
 LE> data using tricks in the ISDN gear to encode the data at 7 bits for
 LE> transmission and reasemble it at the far end.

 BS> I'm charged for less if it made a Data isdn call. The transmission tax
 BS> is actually 2 cents lower. 

Well, nobody ever claimed the US phone companies were all that bright
about pricing things. The places were ISDN was flat rate it catch on
like made. In the places with excessive charges, it didn't catch on. 

And in both cases it was the result of self-fulfilling phrophecies. The
high rate places charged high rates because they figure that very few
people would buy it, so they need high prices to recover their
investment in the gear neeeded for *anyone* to have it. 

In the lowe rate places, they expected a *lot* of users. so they set
the rates low...


--- FMailX 1.60