[comp.dcom.telecom] Being Called From Inside or Outside Centrex

Carl Moore (VLD/VMB) <cmoore@brl.mil> (08/10/90)

If you are on a "Centrex" type phone setup (i.e., dial less than seven
digits for calls within it, and 9 at the start of a call to outside),
you might have a different ringing pattern for calls from within as
opposed to calls from outside.  In my office, it's like this: calls
from within -- regular ringing pattern calls; from outside -- two
quick rings, silence (pattern keeps repeating).


[Moderator's Note: We also have this same thing on Starline, a/k/a
Intellidial Service. The ringing cadence identifies the source of the
call. Front door intercom service uses this as well.  PT]