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- Newsgroups: comp.dcom.isdn
- Path: sparky!uunet!destroyer!ncar!csn!cherokee!huntting
- From: huntting@advtech.uswest.com (Brad Huntting)
- Subject: Re: Obtaining ISDN
- Message-ID: <1992Nov16.235427.11813@advtech.uswest.com>
- Sender: news@advtech.uswest.com (Radio Free Boulder)
- Nntp-Posting-Host: futureworld.advtech.uswest.com
- Organization: U S WEST Advanced Technologies
- References: <27397@oasys.dt.navy.mil> <1992Nov11.163309.8651@ee.rochester.edu> <1992Nov13.154757.28389@bmerh85.bnr.ca>
- Distribution: usa
- Date: Mon, 16 Nov 1992 23:54:27 GMT
- Lines: 65
-
- In article <1992Nov13.154757.28389@bmerh85.bnr.ca> coghlan@bnr.ca (Patrick Coghlan) writes:
- >[With ISDN at home] you would have:
-
- >- a 64 k/bit data line which does not interfere with your use of the
- > telephone
-
- As opposed to a 14.4Kb/s real throughput on a single POTS line. For us
- realistic folks it's really more like ~35Kb/s when you include V.42bis
- compression. Of course now I'll be flamed by the half of the group for
- comparring apples and oranges again, but in the real world it's
- perfectly reasonable to compare these because you cant buy ISDN with
- compression. (Or did I miss something?)
-
- >- use of the X.25 protocol over this data line which can be used to
- > set up multiple sessions simultaneously
-
- Has anyone tested this in the real world? Can your local switch deal
- with X.25 traffic at a reasonable rate (if at all)? How many virtual
- X.25 connections can you multiplex on one B channel?
-
- >- access to any X.25 device hooked up to the ISDN network or other public
- > packet switching networks (most ISDN switches have an X.75 trunk to
- > PPSNs)
-
- But both of them are probably banks and will refuse talk to you...
-
- >- the ability to run data intensive protocols such as X to access
- > your office workstation from home
-
- Without having to multiplex your network trafic over several POTS
- lines.
-
- >In summary, it's fairly fast (compared to 9600 modems) and it doesn't
- >tie up your telephone.
-
- U S WEST has been offering second phone lines for $17/mo.
-
- > It should also be much cheaper to dial-up over long-distance than using
- > telephones and modems since the charges for holding time on packet
- > networks are much less than for voice... I think.
-
- Really? Could some of the folks who work for interLATA carier's
- comment on this creative billing mechanism? This is the first I've
- heard of it. I find it hard to believe that an ISDN call could be
- anything but more expencive than an POTS call. But if you were being
- billed by the packet then it could make sence.
-
- Of course this presuposes that your local RBOC and your longdistance
- carrier can pass ISDN traffic... I dont honestly know if U S WEST has
- that capability with any longdistance provider yet. What would it
- take? SS7?
-
- IDSN offers speed, but requires outragously high priced customer
- premise equipment. So you can get either 35Kb/s out of a second phone
- line for $17/mo with a $300 modem, or 64Kb/s (mabey 128Kb/s) out of an
- ISDN line which you also use as your primary telephone for $X/mo with
- about $2000+ worth of equipment (unless you have a NeXT, a Sparc10 at
- home).
-
- Now how if you are going to shell out that extra $1700+ for the
- hardware to use ISDN (on both ends of the connection probably!), then
- what do you suppose X would have to be to make up for it?
-
-
- brad
-