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- Newsgroups: comp.dcom.isdn
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!linac!att!cbnewsc!cbfsb!cbnewsf.cb.att.com!deej
- From: deej@cbnewsf.cb.att.com (david.g.lewis)
- Subject: Re: ISDN international tariffs
- Message-ID: <1992Dec21.143921.20121@cbfsb.cb.att.com>
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <724643806.AA00663@cswamp.apana.org.au> <1992Dec19.214534.3982@cbnewsd.cb.att.com> <BzKv7n.G82@jshark.inet-uk.co.uk>
- Date: Mon, 21 Dec 1992 14:39:21 GMT
- Lines: 38
-
- In article <BzKv7n.G82@jshark.inet-uk.co.uk> joe@jshark.inet-uk.co.uk (Joe Sharkey) writes:
- >In article <1992Dec19.214534.3982@cbnewsd.cb.att.com> varney@cbnewsd.cb.att.com (Al Varney) writes:
- >>In article <724643806.AA00663@cswamp.apana.org.au> Arthur@cswamp.apana.org.au (Arthur Marsh) writes:
- >>>With one 64 kbps ISDN B channel,
- >>>presumably 7500 cps throughput is possible, a five-fold increase
- >>>at nearly 3 times the per-minute cost plus a big flagfall.
- >>
- >> Where is 7500 cps from??? You should get 64000 bps / 8-bits/c
- >
- >From the USA'a 56kb "digital" services - look at the rest of what you write.
-
- 1. The quotation marks on the word "digital" are somewhat inflammatory -
- 56k switched digital services are just as digital as 64k switched digital
- services. They're not ISDN, but then, they don't claim to be.
-
- 2. The original poster was referring to a 64kb/s B-channel. I am guessing
- Al assumed 64kb/s end-to-end, since the original poster made no reference to
- rate adaption to 56kb/s, and current standards state that a call with bearer
- capability/user service information of 64kb/s UDI, no rate adaption, can be
- cleared by the network if no 64kb/s clear channel facilities are available.
-
- >>>Are there other costs to the telephone company involved that
- >>>already has ISDN capable equipment that can in any way justify
- >>>the extra cost of ISDN?
- >
- >No. In the UK, ISDN comes in after the codecs, so there is *no* difference.
- >Q: Why should I pay more to use *less* of your equipment? ;)
-
- Because you're not using less of my equipment. Even looking solely at the
- line interface - where your "codecs" are - there's more "equipment"
- (hardware and software) for an ISDN interface than an analog loop. An
- analog loop doesn't require a three-layer protocol stack to terminate the
- loop...
-
- Disclaimer: It's not really my equipment, since my part of AT&T has nothing
- to do with ISDN BRI...
-
-
-