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Models MT5600ZDX & ZDXV
Appendix C - V.90 Information
This appendix provides information on ITU V.90 support for the Multi-Tech
MT5600ZDX modem. It lists some of the differences in the ITU-T V.90
code compared to the K56flex only code.
V.90 Support
V.90 is the ITU designation for what had formerly been called V.pcm. The
ITU recommendation V.90 was determined at a meeting in Geneva ending
February 6, 1998. The current draft revision date is 2/4/98; it is expected
to be ratified later in 1998.
V.90 will replace K56flex and other proprietary solutions for PCM
connections. Dual-mode client modem code will be important until all
central-site digital modems are upgraded to V.90 and all interoperability
problems have been resolved. Until that time, the Dual-mode client
code will provide reliable connections in K56flex mode to the central-
site modems currently deployed.
Your V.90 dual-mode (V.90/K56flex) modem now includes:
·New AT commands (+MS=12, AT!),
· New Result Codes in V.90 mode, and
· A-law/u-law selection (+MS parameter 5), and various changes to
the AT command documentation.
These new functions are explained in documents that are readily-available
on the Multi-Tech web site in Portable Document Format (PDF) files at
http://www.multitech.com/support/manuals/IDCfiles/
manuals.idc . You can download the Acrobat Reader to view PDF files
(you may want to bookmark http://www.adobe.com/prodindex/
acrobat/readstep.html before following the download link). For files
with a .ZIP extension, you can download PKUNZIP.EXE to extract the
zipped files from the Multi-Tech FTP site at: ftp://ftp.multitech.com/
Utiltities/PKUNZIP.EXE. Using your favorite Web browser, go to
http://www.multitech.com/support/V.90upgrades.htm for ad-
ditional information on ITU V.90 support and other Multi-Tech products.