[comp.dcom.telecom] Writing Specifications of Call Forwarding & Retry Busy

anthony@uunet.uu.net (Anthony Lee) (10/26/89)

As part of my PhD work, I am trying to write formal specifications of
supplementary services.  I don't even have informal specifications
of simple services such as Call Forwarding or Retry Busy.

There are many questions about access: With Call Forwarding, does the
subscriber have to subscribe to CF before using it or are there cases
where it is just generally available?  To use Call Forwarding, a
subscriber lifts off the handset and dials the appropriate code.  If
it is OK for the subscriber to use CF then would he/she receive a
confirmation tone?  What is the term for the process of making CF
available on one's telephone?.  Is it called "enable" ?  Within the
switch itself what is the general term for actually forwarding the
call?  Would it be called "activation" ?

In general what is the term for making a supplementary service
available for a telephone ?  And what is the general term for actually
executing that service?

To make this even more complicated, in the Retry Busy service, when
the subscriber hears an engaged tone and dials the code for Retry Busy,
is that the "enable" part of the service ?  And when the switch next
scans the destination, would that be called the "activation" part of
the service?

Even better would some kind soul who works for a telco like to post
their specification for supplementary services?  I realize a lot of
documents must be proprietary but surely supplementary services have
been around long enough such that there must be some old docoument
lying in the bottom of some filing cabinet.

I like those stuff posted about Starline Services but they seem to
aim at the customer not the programmer.

Anyway thanks in advance.

Cheers, Anthony
Anthony Lee (Humble PhD student) (Alias Time Lord Doctor)
ACSnet:	anthony@batserver.cs.uq.oz	TEL:(+617) 3712651
Internet: anthony@batserver.cs.uq.oz.au	    (+617) 3774139 (w)
SNAIL: Dept Comp. Science, University of Qld, St Lucia, Qld 4067, Australia