What is AutoSync?
The Hayes Optima V.34/V.90 modem family supports AutoSync technology
The technology referred to as AutoSync is an invention by
the original makers of
the Hayes SmartModem. Its successor, AutoSync 2, still
often simply referred to as AutoSync,
is alive and well in the latest Hayes Optima
modems manufactured by Zoom Telephonics.
Optima modems are sold directly by Serengeti
Systems for use with the AutoSync versions
of 3270Link, 3770Link, 3780Link, and BSCLIB.
Traditionally, PC-to-host products (such
as the ones listed above) require the installation
of either a BSC or SDLC synchronous adapter
to connect with a host system over dial-up
telephone lines. However by utilizing the
AutoSync technology found in the Hayes Optima
modems, these Serengeti products do not require
any hardware other than an Optima modem attached
to one of the PC's serial ports. In AutoSync
mode, which is automatically enabled by any
of the Serengeti AutoSync emulation products,
the Optima modem performs an internal asynchronous-to-synchronous
conversion, on the fly, permitting PC-to-host
interoperability. The advantages are significant:
- Installation of the product is greatly simplified
since no adapter needs to be installed
- The same modem and phone line is easily shared
for async and host communication
- The net cost of an AutoSync installation
is typically less than the traditional equivalent
AutoSync Myth vs. Fact
Myth: AutoSync modems are no longer being made
and sold because Hayes Microcomputer Products
went out of business.
Fact: Hayes did go out of business back in January
1999. However, the Hayes name and product
line, including the Optima modem (and AutoSync),
was obtained by Zoom Telephonics and reappeared
on the market in the summer of 1999.
Myth: Modems not made by Hayes (Zoom Telephonics)
have support for AutoSync.
Fact: While this might have been true many years
ago, it is not today. Only the Optima 336
and 56K Business modems support the latest
version of AutoSync, AutoSync 2, and are
supported by Serengeti emulation products.
In years past, Hayes licensed AutoSync technology
to third party modem manufactuers and it
was incorporated into various non-Hayes modem
products. However, this was the original
version of AutoSync, not AutoSync 2, and
even if these products still exist they would
not be supported by Serengeti emulation products.
Myth: When using an AutoSync modem with a Serengeti
product, there has to be an AutoSync modem
on the host side of the connection as well.
Fact: AutoSync is strictly a local, internal
function of the Optima modem based on commands
received from AutoSync enabled products such
as those from Serengeti. The only requirement
at the host side is a 9600 bps or faster
V.32/V.34/V.90 compatible modem. The modem
at the host side cannot distinguish between
an AutoSync modem or a "normal"
V.32/V.34/V.90 synchronous modem.
Myth: All synchronous modems are AutoSync modems.
Fact: No. There is some confusion in the marketplace
that the terms "synchronous modem"
and "AutoSync modem" are interchangeable.
This is false. All AutoSync modems support
synchronous operation (as well as asynchronous
operation), but not all synchronous modems
are AutoSync capable.
AutoSync questions? Call or e-mail us.
Hayes modems are manufactured by Zoom Telephonics Inc.