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- Xref: sparky comp.protocols.nfs:3170 comp.dcom.isdn:1189
- Path: sparky!uunet!olivea!gossip.pyramid.com!pyramid!infmx!johng
- From: johng@informix.com (John Galloway)
- Newsgroups: comp.protocols.nfs,comp.dcom.isdn
- Subject: Inexpensive isdn/ether brouters (was Re: PC-NFS PPP Serial/ISDN driver wanted)
- Message-ID: <1993Jan21.080516.20246@informix.com>
- Date: 21 Jan 93 08:05:16 GMT
- References: <5da984b1.1bc5b@pisa.citi.umich.edu> <1993Jan20.034052.912@informix.com> <5daf63a9.1bc5b@pisa.citi.umich.edu>
- Sender: news@informix.com (Usenet News)
- Organization: Galloway Research
- Lines: 36
-
- In article <5daf63a9.1bc5b@pisa.citi.umich.edu> Jim.Rees@umich.edu writes:
- >In article <1993Jan20.034052.912@informix.com>, johng@informix.com (John Galloway) writes:
- >
- > Given the couple of extra items (like a LANCE chipe set, and the NT1)
- > an isdn/ethernet bridge should cost a bit more than a modem.
- >
- >Why? The isdn bridge/gateway is a simpler device. It doesn't do any dsp,
- >and it shouldn't do error correction or compression (those belong in the
- >transport layer). So it should be cheaper.
- agreed here, bag error correction and compresion.
-
- I don't see it. Maybe if you were starting from scratch for both designs,
- but even then both ethernet and isdn are more complex interfaces than are
- a serial port and an analog line. I agree you should be able to do without
- the DSP, but is the transistor count of a DSP+CPU+MEM+SERAIL modem
- more than a CPU+MEM+LANCE+ISDN brouter? (transistor count seemed like the
- most easily quantifiable measure of "simpler"). Even if all compponents
- had similar price advantages from equal mass production, I would still
- expect the brouter to be a bit pricier than the modem.
-
- On the other hand if you think you can build one for to sell for $250, I'll
- not only buy one, but fund their production! (now if I could just find those
- lottery tickets...$-)
-
- -jrg
-
- internet jrg@galloway.sj.ca.us John R. Galloway, Jr 795 Beaver Creek Way
- internet johng@informix.com CEO...receptionist San Jose, CA 95133
- applelink D3413 Galloway Research (408) 259-2490
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-
-
- --
- internet jrg@galloway.sj.ca.us John R. Galloway, Jr 795 Beaver Creek Way
- internet johng@informix.com CEO...receptionist San Jose, CA 95133
- applelink D3413 Galloway Research (408) 259-2490
-