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- Path: sparky!uunet!usc!wupost!spool.mu.edu!telecom-request
- Date: Sun, 3 Jan 1993 08:13:09 GMT
- From: dannyb@panix.com (Daniel Burstein)
- Newsgroups: comp.dcom.telecom
- Subject: Re: All Circuits Are Busy Now ...
- Message-ID: <telecom13.7.5@eecs.nwu.edu>
- Organization: Panix, NYC
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 13, Issue 7, Message 5 of 13
- Lines: 53
-
- Some posters have asked what it meant when they tried making a long
- distance call and got back the recording "all circuits are busy,
- 418-25T" (or similar stuff).
-
- Well, in the OLD days, your LD call would get pushed along the route
- until it hit a switch or trunk "somewhere out there" which was busy.
-
- BUT, in the new modern age, your call is "held" at the local central
- office (or, perhaps, a centralized toll/long distance interface) until
- the entire rest of the path can be set up. Accordingly, if -anything-
- is wrong -amnywhere- from the office (either one) to your final
- destination, you will get a LOCALLY GENERATED recording. (Again, this
- might be at a somewhat distant toll switching station, but it'll be a
- LOT closer than it used to be).
-
- I've had this experience far too many times when calling from my area
- to places that, for some reason or another, had a partial disruption
- in trunk service, or had a sudden increase in traffic. For example,
- after the Florida hurricane, I tried to call some of my co-workers who
- had been sent down there, and kept getting "all circuits are busy ...
- 212-XT" with "212" being the area code UP HERE (NYC).
-
- As others have pointed out, certain long distance carriers are less
- likely to be jammed than others, but I'll refer back to them for the
- details.
-
- HOWEVER, that does remind me of some trouble I had fifteen or twenty
- years ago. From 11:00 pm till about 11:30, it was almost impossible
- tomake outgoing long distance phone calls from my neighborhood. After
- a LOT of arguing with NYTel, and finally tracking down some techies
- who understood their network, we figured out what was happening.
-
- The area I lived in was next to a university with lots of residential
- students. Many of whom would either call home, or other distant
- locations. Accordingly, the time vs. number of calls equation in this
- area was very different from that in more traditional localities.
-
- College age students, for example, are more likely to be awake at
- 11:00 pm, are more likely to hold off on making their calls until
- then, will tend to talk longer (????), etc., etc., etc. I'm sure
- anyone reading this can easily come up with many other reasons the
- standard phone queing formulas didn't work.
-
- Anyway, once they actually looked at blocked calls, they added a few
- more outgoing trunk line connections to the toll centers (i.e., they
- set it up to allow for more LD calls).
-
-
- Take care,
-
- dannyb@panix.com
-
-