🚀 go-pugleaf

In article <josef.657189877@peun11> josef@nixdorf.de (Moellers) writes:

   Questions:
   1. Is this dialing part of ISO layer 1 (physical layer)?
      In my opinion, it is.

In my opinion, it's part of a primitive Network Layer.

   2. How do I specify the address/numbers to use?

Have you tried a sequence of digits?  :-)

Seriously, being part of the Network Layer, I would guess you could
construct some Network Service Access Point address which would
conveniently map to the telephone number.

Note: By putting connection establishment into the Network Layer, you
can use different Data Link protocols for connection establishment and
release than for data transfer, since you talk to the modem.

I'm almost of the opinion that you could construct a whole seven-layer
model for dialling and phone protocols.  They did it with Digital
Subscriber Signalling system # 1 and Signalling System # 7, yet I
routinely view the dialling and the phone connection as pretty
low-level.

Moral: The ISO RM for OSI applies from several angles of view.

--
[Erik Naggum]		Naggum Software; Gaustadalleen 21; 0371 OSLO; NORWAY
	I disclaim,	<erik@naggum.uu.no>, <enag@ifi.uio.no>
  therefore I post.	+47-295-8622, +47-256-7822, (fax) +47-260-4427
--