General Wireless Network Question

[Terry Lambert]

Dag-Erling Smørgrav wrote:
> naddy at mips.inka.de (Christian Weisgerber) writes:
> > Brad Knowles <brad.knowles at skynet.be> wrote:
> > > I would say that VOIP over 802.11b could very easily be marginal at
> > > best.
> > Oh c'mon, standard telephony voice is 64kbit/s.
> 
> No.  ISDN voice uses up to 64 kbps, but analog POTS uses a lot less,
> and standard GSM works just fine with only 9600 bps.

FWIW, in the U.S. there are two types of ISDN: the kind you
are talking about here, which requires upgraded cards in the
CO in order to support out of band signalling, and the kind
Veriozon (formerly U.S. West) was selling for a long time
which uses in-band signalling and on does 56K, but which lets
you use the older Nothern Telecom DV3 switches without needing
to upgrade the cards or the wires.  Yeah, it's ugly.  The 9600
baud in the out-of-band case comes from a separate set of wires
(and is "always on", like the GSM).  If you're in a Verizon
area, you are going to be unlikely to be able to get this for a
while (they used to use the 9600 baud switch signalling channel
to send email while the 64K/128K connections were down, back in
the mid 1990's, as a selling point; they could even light a
blinky light on the phone when you had email waiting).

-- Terry