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From: dave@CS.UCLA.EDU.UUCP
Newsgroups: comp.dcom.telecom
Subject: Re: dialling patterns
Message-ID: <8917@shemp.UCLA.EDU>
Date: Fri, 30-Oct-87 03:17:47 EST
Article-I.D.: shemp.8917
Posted: Fri Oct 30 03:17:47 1987
Date-Received: Tue, 3-Nov-87 01:59:43 EST
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Reply-To: dave@cs.ucla.edu (David Shrader)
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It is common to see both 00 and 01 used in different areas to
access a long distance carrier for either operator or direct
calls.

The 1+ dialling requirement you find in DC and a couple of years
ago required in other states is so that you can start having 
local exchanges that look like area codes: 416, for example.
The switching office can no longer look at the second digit dialled
to see if it is 0/1 and determine long distance.  Hence, the 1+.

Dave Shrader
dave@cs.ucla.edu
..!ucla-cs!dave