Re: Written format of phone numbers [telecom]

Re: Written format of phone numbers [telecom]

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Subject Author Date
Re: Written format of phone numbers [telecom] Adam H. Kerman 03-07-2008
Posted by Adam H. Kerman on March 7, 2008, 6:20 pm
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>Adam H. Kerman wrote:

>But there *ARE* some other (European) countries where the full
>national number MUST be dialed, even for "local" calls within the
>same area code, and the legacy leading '0' (displayed as the first
>actual digit of the area code) must also be dialed. I think France
>has been like this for at least ten years now.

I'm confused. I thought in the French dialing plan, 0 is a significant
digit in the first position of a telephone number as in the example
given in the other followup about how the French voice telephone numbers
by stating pairs of digits.

>>If that's the case, why is continued use of the 0 prefix part
>>of the dialing plan?

>Don't ask me.

It was rhetorical. I live in an area that requires 10-digit dialing with
a leading prefix for both home and foreign NPA dialing. I don't object
the overlay policy that makes use of the home NPA mandatory in the
dialing plan, but I do object to the leading prefix. The "1" ain't a
domestic trunk-identifying code as no such code was used in this area in
the days before electronic switches. It's a legacy of the expanded area
code rules, so only very recent, with no explanation as to why it's been
retained.


Pure Networks
Posted by on March 8, 2008, 6:29 pm
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> The "1" ain't a
> domestic trunk-identifying code as no such code was used in this area in
> the days before electronic switches. It's a legacy of the expanded area
> code rules, so only very recent, with no explanation as to why it's been
> retained.

We have ten digit dialing for all calls, but the 1 prefix is required
for out-of-LATA calls.

It's a legacy of being a toll barrier, that is, a warning to the
customer that the number dialed would be a toll call. Actually, I
find it a nuisance, but then I don't like ten digit dialing either.

At work, we still have 7 digit dialing, and 1 is necessary external
area code calls. However, the switch excepts 10 digit dialing even
within our own area code. The area codes have become so tiny that 10
digits are needed for most calls anyway.

As mentioned separately, newspaper ads always show the area code.

All of this is legacy of various switch plans, local differences (like
needing only 7 digits to call a _different_ area code in certain
instances), etc.

I still blame the explosion of interconnecting carriers. My town has
about 12 exchanges assigned to it when three would be more than enough
for actual needs.


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other useful resources:
The Federal Communications Commission (FCC)
Telecommunications Industry Association
Electronic and Software Security Products and Services
International Telecommunication Union

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