djcl@uunet.uu.net> (08/06/90)
It seems that 510 is not switched on everywhere as of yet, but in one exchange where it is active, dialing 1 510 555.1212 will get a response of 55 or 110 baud warbles (ie. TWX!). Dialing something like 1 510 637 xxxx from a payphone gets an operator who wonders what is going on. Anyone know what the 555 prefix would do in TWX? Is it an invalid exchange? Is it their own version of directory assist? [Moderator's Note: Years ago, (TWX) 555-1212 got directory from the TWX operator serving that particular area code. The TWX areas are 410, 510, 710 and 910 for the USA; 610 for Canada and 810 for Mexico. 610-555-1212 still gets Canadian TWX Directory Assistance. Now I think Western Union has all directory for the USA in 410-555-1212. Bell CO's *still* handle a lot of the switching for TWX; i.e. Chicago-Wabash has lots of 910-xxx-xxxx circuits for TWX machines here. Voice phones were always blocked from dialing X10 numbers: someone is removing the block without re-routing the calls it would seem! PT]