Leroy.Donnelly@uunet.uu.net> (06/12/91)
Could someone give me insight on how the phone companies bill for long distance. Is it based on a grid map or LAT/LONG points. Ybbat (DRBBS) 8.9 v. 3.13 r.5 [200:5010/666@metronet] NOT EVERYONE USES AN IBM PC :-( (200:5010/666.0)
Jim.Redelfs@uunet.uu.net> (06/13/91)
Leroy Donnelly wrote: > Could someone give me the insite on how the phone companies bill for > long distance. Is it based on a grid map or LAT/LONG points. Across the country, I'm sure there are numerous, different methods for BILLING for long distance useage, but can I assume you are interested in how the phone companies HANDLE long distance? LATAs (Local Access and Transport Areas) were created to define how long distance would be handled following Divestiture. Within the Nebraska Area Code 402, there are TWO LATAs -- one served by US WEST Communications (formerly Northwestern Bell Telephone Company) and the other by Lincoln Telephone and Telegraph. For example: A toll call from Omaha to Norfolk, NE (both US WEST Communications cities) is transported over the facilities of, and billed by, US WEST Communications. A toll call from Omaha to Nebraska City, NE (the latter served by LT&T) is billed by your default (1+ Choice) carrier. In my case, such a call appears on my AT&T bill. A toll call from Omaha to Grand Island, NE (both served by US WEST Communications -- *BUT* different Area Codes) is also billed by your 1+ carrier. I'm not sure about other areas, but within Nebraska, the MAJOR toll carriers have not (yet) ventured into the INTRA-Lata business. JR -- Tabby 2.2 MacNetOmaha(402)289-2899 Multitasking w/MacOrphans (1:285/14)
Dave.Leibold@f135.n82.z89.onebdos.UUCP (Dave Leibold) (06/20/91)
Leroy Donnelly <ivgate!Leroy.Donnelly@uunet.uu.net> writes: > Could someone give me insight on how the phone companies bill for long > distance. Is it based on a grid map or LAT/LONG points. Each exchange or "rate center" is given what's known as a V&H co-ordinate representing Latitude and Longitude. For instance, Toronto Ontario has a V of 4981 and an H of 2488. For a rate distance between two points, the difference in V's of the points and the difference in H's of the points are squared and added, much like the Pythagoreas Theorem used to calculate the hypotenuse of a triangle. If rate distance is R, then R^2 = V^2 + H^2, although the R value won't exactly come out in miles or kilometres. A bit of extra calculation is done, but the principle is there. Those in Bell Canada territory can try to find CRTC tariff 6716 for a detailed look at the calculation, or other telco long distance tariffs might explain this. There's also supposed to be an AT&T Tariff FCC #10 which i've never seen, but is referred to in Bell Canada's tariff. I also caught the V&H co-ordinates in a book entitled DDRG (Direct Dialing Rate Guide?) complete with stuff like Mexico's 52X and 8XX pseudo-NPA's listed. That document might merely be a hardcopy version of the Bellcore V&H tape spoken of frequently in the Digest. There were even things called "coin check" digits which refer to the digit of the local number just after the prefix. For instance, a coin check digit of "9" for a prefix 234 would mean that operators have to be careful about placing collect calls to numbers of the form 234-9xxx. This is not too convenient for very small exchanges like 519-526; that prefix barely contains 300 phones, thus the coin check of 526-7xxx would mean all collect calls to 526 get the third degree (unless specific payphone series or numbers are now made available to operators electronically). dleibold@attmail.com Dave Leibold - via IMEx node 89:681/1 Dave.Leibold@f135.n82.z89.onebdos.UUCP