brent@uunet.uu.net (Brent Capps) (09/29/90)
In article <12710@accuvax.nwu.edu>, bill@toto.info.com (Bill Cerny) writes: > If you tire of reaching reorder when dialing > '8' for routine AUTOVON, you call the operator and provide the > authorization code for the precedence (P, I, F) and destination > (CONUS, Overseas), to which she usually replies, "I'm sorry sir, there > are no circuits available at this time." :-( I would be a little suspicious that I was being fed a line if an operator at a batphone (a.k.a. attendent console) told me all circuits were busy when I placed a call at flash precedence. That's a pretty high precedence level, and should preempt anything and everything that gets in its way -- trunks, 2W or 4W sets, 3- or 6-port conference bridges, you name it. The only thing it won't preempt is another call at flash or flash override precedence. > Apparently, the 4-wire desk sets have been > replaced by regular 2500 (or 74xx, or STU III) sets. You select > AUTOVON precedence with the trunk code (80 for routine, 81 for > priority); provided your station has the class of service mark to > access that precedence (otherwise it's back to authorization codes and > the operator). The availability of the precedence code 80, 81, etc, on 2W sets is why the 4W sets aren't needed anymore. Remember, 4W sets are trunks -- therefore, they have to be able to directly generate the extra DTMF tones associated with the precedence level. This is why they have to have 16 keys, whereas a 2W set doesn't; the CO intercepts the precedence code and inserts the precedence digit when dialling on a trunk. The only remaining advantage to a 4W set is the comparitively long distance that the set can be located from the CO. I don't know about AT&T, but the NT SL-100s at Vandeland and Wright Pitiful AFB still have a few 4W sets, or did as of 1988. Brent Capps "insert standard disclaimer here" Kentrox Ind., Inc. uunet: ...!kentrox!brent Portland, OR (503) 643-1681 x325