local calls

Unanswered Question
Aug 14th, 2009
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Well, it's not a technical question but there is a confusing point to me. In USA they have 7 digits dialing and 10 digits dialing and both are for local calls, so when they use 7 digits and when they use 10 digits. I think it will be an easy question for people who already live in USA :).

Thanks in advance.



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Overall Rating: 5 (2 ratings)
cisco steps Fri, 08/14/2009 - 07:37
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not to be so technical.it depends on CO ( CENTRAL OFFICE ) there is either ESS5 or ESS7 witch is switch that has the config. so let say I leave in(A)city of 5000 people that is not a large area and no need to be divided so all the dial is the 7 digits. But if you leave in city (B)of 15000 people then the phone company configure the switches to require the AREA CODE and that where You ADD 3 to 7 = 10

Hope that helps

Jonathan Schulenberg Fri, 08/14/2009 - 18:06
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    2017 IP Telephony

The NANPA has several tools that allow you to identify where this will apply as well.



Specifically, the NPA Search tool will show you the dial plan rules for a specific NPA (area code).



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