home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Thu, 31 Dec 92 00:09:36 EST
- From: andys@internet.sbi.com (Andy Sherman)
- Newsgroups: comp.dcom.telecom
- Subject: Re: All Circuits Are Busy Now ...
- Message-ID: <telecom12.925.1@eecs.nwu.edu>
- Organization: TELECOM Digest
- 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 12, Issue 925, Message 1 of 9
- Lines: 64
-
- On 25 Dec 92 21:26:00 GMT, john@zygot.ati.com (John Higdon) said:
-
- > I would have thought that by now AT&T would have stopped its annoying
- > practice of drastically reducing its capacity on holidays. A number of
- > AT&T employees have told me that for reasons that are not very clear,
- > the company has traditionally blocked off a major amount of the
- > system's capacity on various holidays such as Christmas and Mother's
- > Day. This is the real reason you get the "All Circuits Busy"
- > recording, not because there is an inordinate amount of traffic.
-
- I will admit I don't know whether this is true or false (a rare
- admission -- treasure it) but it doesn't make any sense. Every year
- after Mothers' Day, Thanksgiving, etc., AT&T issues a press release to
- the effect that they set yet another volume record with X completed
- calls from Y attempts.
-
- I can't imagine why they would deliberately turn away business, since
- they make money selling it. Furthermore, if you go find back issues
- of the {AT&T Technical Journal} in a library, I suspect you will find
- that Mothers' Day is the acid test for new routing algorithms like
- DNHR (Dynamic Non-Hierarchical Routing) and RTNR (Real Time
- Non-Hierarchical Routing).
-
- > Naturally, there is no trouble calling anyone on Sprint or MCI since
- > these companies do not engage in this silly ritual of network choking.
-
- They also don't have anywhere near the market share, which means their
- networks aren't presented with anywhere near the load. I *have* heard
- that the OCCs have more headroom, since they have all those trunk
- routes in place but lower market share ...
-
- Maybe one of my ex-colleagues will address this issue?
-
- On 27 Dec 92 09:24:00 GMT, john@zygot.ati.com (John Higdon) said:
-
- > How soon we forget. Hours after the 1989 Loma Prieta earthquake, I
- > tried at some length to get though to my home from southern
- > California. All circuits were busy. Then I tried Sprint. The call
- > went right through. Discussions right here on the Digest pointed to
- > the policy of AT&T of purposely restricting incoming access to a
- > disaster area. I, for one, was very grateful for the fact that AT&T's
- > policies are not always imitated by the competitors.
-
- The choke after the earthquake had a reason behind it. It was to
- reserve some large fraction of trunk capacity for outgoing calls from
- the disaster area. That policy and the reason for it was plastered
- all over the media, in hopes that people would wait for the "I'm OK"
- call rather than flooding the network with call attempts to empty
- houses. I believe that the disaster assistance agencies also liked
- that arrangement, since it improved the chances of their folks on the
- scene being able to call out.
-
- I'm quite surprised to hear my ex-employer take it on the chin for
- their response to a disaster. Time after time, when disaster strikes,
- they send out portable COs and portable phone banks to help put the
- victims in touch with relatives and with help. So where are the OCCs
- at those times?
-
-
- Andy Sherman Salomon Inc - Unix Systems Support - Rutherford, NJ
- (201) 896-7018 - andys@sbi.com or asherman@sbi.com
- "These opinions are mine, all *MINE*. My employer can't have them."
-
-