jparnas@larouch.watson.ibm.com (Jacob Parnas) (07/05/90)
I'm new to the 56/64 Kbaud CSU/DSU market. I'm trying to find out if there is some way to add compression on top of a base 56 Kbaud Switch-56 connection like one can MNP or LAPM compression on top of a base 9600 baud V.32/V.42 modem to increase throughput on compressable data. Thanks for your help, ------------------------------------------------------------------------------ | Jacob M. Parnas | DISCLAIMER: The above message is from | | IBM Thomas J. Watson Research Ctr. | me and is not from my employer. IBM | | Arpanet: jparnas@ibm.com | might completely disagree with me. | | Bitnet: jparnas@yktvmx.bitnet \---------------------------------------| | Home: ..!uunet!bywater!acheron!larouch!jparnas | Phone: (914) 945-1635 | ------------------------------------------------------------------------------
tnixon@hsfmsh.UUCP (Toby Nixon) (07/05/90)
In article <1990Jul5.041930.5835@larouch.uucp>, Jacob Parnas asks:
- I'm trying to find out if there is some way to add compression on
- top of a base 56 Kbaud Switch-56 connection like one can MNP or LAPM
- compression on top of a base 9600 baud V.32/V.42 modem to increase
- throughput on compressable data.
I can see no reason why one couldn't run V.42 and V.42bis on top of
a digital link; it should work just fine. However, there is no
STANDARD for this. Therefore, I think you may be hard pressed to
find such a solution on the market today -- but might be able to
make a lot of money by designing and selling one!
-- Toby
-----------------------------------------------------------------------------
Toby Nixon, Principal Engineer Fax: +1-404-441-1213 Telex: 6502670805
Hayes Microcomputer Products Inc. Voice: +1-404-449-8791 CIS: 70271,404
Norcross, Georgia, USA BBS: +1-404-446-6336 MCI: TNIXON
Telemail: T.NIXON/HAYES AT&T: !tnixon
UUCP: ...!uunet!hayes!tnixon Internet: hayes!tnixon@uunet.uu.net
MHS: C=US / AD=ATTMAIL / PN=TOBY_L_NIXON / DD=TNIXON
-----------------------------------------------------------------------------dms@fciva.FRANKLIN.COM (Douglas M. Stevens) (07/09/90)
In article <3431@hsfmsh.UUCP> tnixon@hsfmsh.UUCP (Toby Nixon) writes: >In article <1990Jul5.041930.5835@larouch.uucp>, Jacob Parnas asks: > >- I'm trying to find out if there is some way to add compression on >- top of a base 56 Kbaud Switch-56 connection like one can MNP or LAPM >- compression on top of a base 9600 baud V.32/V.42 modem to increase >- throughput on compressable data. > We recently got a quote from Glasgal Communications, Inc (201-768-2947) for just such a product, called the SYNPLEX DATAMIZER III. This product provides up to a 4:1 increase in throughput. The Datamizer III adapts the size of the packets on the link increasing or decreasing packet size to improve network throughput efficiency. SYMPLEX has various processor models that operate over analog or digital facilities at speeds of 9.6, 19.2, 56 and 64 K as well as fractiona T1 rates up to 256Kbps. Doug Stevens dms@fciva.UUCP Franklin Mortgage Capital Corporation