[Asterisk-Users] USA dial plan

[Senad Jordanovic]

>Yes, in most places in the USA local calls are totally free, no per min
>charge. 
 This is not true in the US for business lines.  Residential lines have
a "free" local calling area.  However, business lines from an incumbent
local exchange carrier like SBC nearly always charge rates for 7-digit
local calls, usually, but not always based on mileage zones.  Rates vary
based on the local carrier, time of day and the distance.  Different
rate schemes apply in different parts of the country.  Some use Zone
Usage Measured (ZUM) schemes, others use Flat Rate or Measured Rate
schemes. There are different rate plans for the same carriers for local
toll calls that fall outside the local calling area but are within the
same LATA. 
 
 Some states do allow 10-digit dialing without a 1+.  Washington DC
(202) is an example of this for making local calls to other adjacent
area codes.  The entire North America Numbering Plan (NANP) is in a
constant state of change as new area codes are added.  There are 4
different dialing plans for each area code that can vary with regard to
the number of digits required and whether a 1+ is required:

 
- Home NPA Local Calls
- Foreign NPA Local Calls
- Home NPA Toll Calls
- Foreign NPA Toll Calls
 
If you go to www.nanpa.com and click on the "Dialing Plans" option in
the left column, you can get the current ("Standard") and evolving
("Permissive") dialing plan for any area code.  For example, 310 is
currently setup this way:
 
Dialing Plan                      Standard                Permissive
- Home NPA Local Calls               7D                      1+10D
- Foreign NPA Local Calls           1+10D                     NA
- Home NPA Toll Calls                7D                       NA
- Foreign NPA Toll Calls            1+10D
 
This says you currently dial local calls within 310 as 7 digits, but the
plan will change to require 1+10 digits which is currently permitted.
 
Hope this helps 
David Schlossman
 <mailto:david at atcomm.com> david at atcomm.com 
 
------------
hmmm... Damn Outlook.. It wont do the quoata again..  Sorry about
this.!!!
 
Anyway,
 
Dabid, do you know when all local calls will have to be dialed with "1"
appended?
 
Ta
SJ 
 


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