[comp.dcom.telecom] How do PBXs & COCOTs spot 7D toll calls?

cmoore@brl.mil (VLD/VMB) (09/18/90)

I don't know the answer to this question (see subject header),
nor do I know how local calls requiring 1+NPA+7D are spotted.

To review: more-than-7-digit local calls appear in the DC area (from
301-621 etc. to 301-569, plus those extended-area calls from Va.
suburbs to Prince William area--these should reduce to 7 digits after
the dust settles from NPA+7D scheme for inter- NPA local calls in DC
area) and also in local calls from Pa. to Del., and in local calls
across NPA lines in San Francisco and Los Angeles areas 
(California).

Toll calls within a New Jersey NPA are 7 digits.

(But I now stand corrected on toll calls within 313: those are
1+313+7D instead of 7D.)