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MultiModemZBA-V-V92 User Guide
V.92 Operation
Because the V.92 protocol is new and still largely unsupported by central servers, some features are
disabled by default in the initial release of the MT5634ZBA-V-V92 modem. This section describes the
status of the V.92 features in the initial release. Please note that the V.92 special features require
connection to a V.92-capable server.
General. The V.92 protocol is enabled by default. If the MultiModemZBA-V-V92 detects another
V.92 modem during the handshake phase, they will connect in V.92 mode; otherwise, they will
connect in V.90 mode or the highest mutually acceptable mode. The AT command that controls
this is +MS=.
Commands. AT commands specific to the V.92 protocol and the new V.44 compression protocol
begin with the plus character (+). These commands are in this manual. Also, the S109 register
has been modified to support V.92.
PCM Upstream. PCM Upstream is disabled by default. To upload files at speeds above 33.6
kbps, you must enable PCM Upstream using the command +PIG=1. Please note that this requires
connection to a V.92-capable server. Also, please note that since upload speeds are affected by
line conditions, meeting the previous requirements cannot guarantee speeds above 33.6 kbps.
Quick Connect. Quick Connect, which shortens the handshake time with another V.92 modem, is
disabled by default. To enable it, use the command +PQC=0. Quick Connect speeds connect
times by skipping the line test during the handshake and using the configuration from the last data
connection. Quick Connect works best when line conditions are consistent from call to call. If line
conditions are variable, enabling Quick Connect can actually increase the connect time slightly.
Modem on Hold. Modem on Hold enables you to put a V.92-capable server on hold while you
take another call (see Chapter 7). Modem on Hold operation is possible only with the MTMoh
Modem on Hold program included with the MT5634ZBA-V-V92. MTMoh is initially supported only
on Windows 95, 98, and Me. However, Windows NT, 2000, and XP support is expected soon, and
may be available by the time you receive your modem.
Firmware updates for the MT5634ZBA-V-V92 can be downloaded from http://www.multitech.com/
SUPPORT/MultiModemZBA/firmware.asp. Please see the Appendix for update instructions. MTMoh
updates can be downloaded from http://www.multitech.com/SUPPORT/software/.
Connecting to the Internet
Your Multi-Tech modem is your gateway to the Internet and the World Wide Web. To access the
Internet and Web via your modem, you must establish a dial-up account with an Internet service
provider (ISP). To locate an ISP near you, look in a local directory or computer publication. Your ISP
should provide you with the following information:
User name (also called user ID)
Password
Access number (the number you call to connect to the server)
Host name and/or domain name
Domain Name Server (DNS) server address
If, besides the Web, you use the Internet for e-mail and newsgroups, your ISP should also provide
you with the following information:
E-mail or POP mail address
POP server address
Mail or SMTP address
News or NNT server address