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- Newsgroups: comp.dcom.isdn
- Path: sparky!uunet!cs.utexas.edu!sun-barr!sh.wide!wnoc-tyo-news!sranha!sranhd!sran233!nisimura
- From: nisimura@sran233.sra.co.jp (Tohru Nishimura)
- Subject: Re: isdn "supermodem"
- Message-ID: <C1CK77.5Cy@sranhd.sra.co.jp>
- Sender: news@sranhd.sra.co.jp (Usenet News System)
- Nntp-Posting-Host: sran233
- Organization: Software Research Associates, Inc., Japan
- References: <1993Jan22.160035.7443@sifon.cc.mcgill.ca>
- <1993Jan23.215546.8466@xenitec.on.ca>
- Date: Sun, 24 Jan 1993 07:16:03 GMT
- Lines: 48
-
- In article <1993Jan22.160035.7443@sifon.cc.mcgill.ca>, rob@polestar.facl.mcgill.ca (Robert Macfarlane) writes:
-
- > Here's an arrangment I would like to see:
- >
- > customers | POTS | C.O. | ISDN link | my house
- >
- > end user modem ------ modem --|-------------|
- > end user modem ------ modem --| |
- > end user modem ------ modem --| multiplexer | +---------------+
- > end user modem ------ modem --| |=========| my BBS server |
- > end user modem ------ modem --| | +---------------+
- > end user modem ------ modem --|-------------|
-
- Although it is not the product what Robert Macfarlane wants, there is a
- product utilises an ISDN line as a flexible multiplexed line.
-
- The box is manufactured by NEC, which provides various convensional
- interfaces with plug-in cards upto 16 slot. There are 5 type cards;
- 2 port analog telphony card, 2 port X.21 card, 2 port V.35 card, 2 port
- RS-232 card, 2 port RS-449 card. You can combine any cards in one box.
- Unfortunately there is no "super modem" card fit in the box, yet.
-
- PRI ISDN +----------------------+
- | |-- various interfaces
- ===========>| multiplexing PRI TA |-- phones, V.35, X.21, RS.232
- | |-- RS-449
- +----------------------+
-
- This TA are able to provide independant 23 B channels (because Japanese
- PRI servies is 23B+1D), or serval H0 channels, or one H10 channel.
-
- Most important feature is this box is able to provide very flexible use
- of one ISDN line, such as on-demand "line bonding" for H0 or H11 call,
- one (and/or serval) line numbers for a set of multiple equipments,
- explicit equipment determinatating with "subaddress", and so on.
- In some sense, this box is similar to flexible full funcational PBX.
-
- I do not know whether this NEC ISDN TA is available in North America area,
- however, TANDEM Computer System sells "TANDEM block" coloured version as
- their product at least in Japan.
-
- Tohru Nishimura
- Software Reseach Associates, Inc. Tokyo Japan
-
- Have you ever seen "ISDN digital public telephone" on the street? It has 1
- RJ-11 analog port and 1 RJ-45 ISDN digital port as well as oridinal public
- telephone. Although there is no ISDN card for Note PCs (yet), I have ever
- used it with ISDN/IP card equiped SONY UNIX laptop.
-