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Re: ISDN current events (fwd)
David Lesher wrote:
> Climbing onto a nearby soapbox, James Love proudly proclaimed:
> > a few persons thought I made a mistake here, and that I meant a single
> > "B" channel, but I did mean the D channel (the 16k data channel), even
> > though my grammar left a little to be desired. That is, I was told that
> > a residential ISDN connection, being used for data, can dynamically close
> > or open the B channels depending upon whether or not data is being
> > transfered, while keeping the D channel open (or something to this effect).
> > ... if true, this would pretty much eliminate the need for the usage
> > based charges....., it would seem to me. jamie
> This is not a big deal technically. It *is* bureaucratically.
> The RBOC's sell packet service now. But they've little incentive
> to allow free D channel to set up B channel.
Uh, maybe what little I've read about ISDN has given me a misconception, but isn't
a D channel (Signalling Channel) *required*, in order to signal between the local
user and the switching equipment? Effectively, I thought the D channel was the
dialtone/touchtone portion of the connection, while a B channel would be the
talking/modem-data portion. Residential ISDN was supposed to be two 64K B
channels, and one 16K D channel. The D Channel doesn't talk to anything
but the phone company's switch, in order to request services. It can't be used
to transport customer data/voice to another remote customer.
It doesn't seem reasonable to me for the phone company to have "bureaucratic" problems
about providing the D channel. If it isn't provided, doesn't that leave the customer
with no way to dial the phone? Why would the phone company want to try to charge
extra for something that is not optional? I say, build the cost of the D channel into
the regular monthly rate, and don't present it as a line item.
Or do I misunderstand the need for the D channel?
Andrew C. Esh mailto:email@example.com
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