ZyXEL U-336E User Manual - Page 36

Helpful Hints for Mac Computers

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ZyXEL Serial/Parallel I/O Card For high-speed PC to modem communication, ZyXEL produces a special I/O adapter card. This card includes a serial port and a parallel port, each with special features, particularly when working with a ZyXEL modem, for example: The serial port is 16550-compatible for most communication software usage. It has a speed of up to 460.8Kbps and data loss errors will not occur when working with a ZyXEL modem's serial port. This solves high-speed communication problems in Windows and other multi-tasking systems. The serial port has a 32-byte transmission and a 32-byte receival FIFO to increase communication program efficiency. Helpful Hints for Mac Computers Special AT Command Settings for Mac For operation with Mac computers, you may use the factory default settings with one exception. You must set the modem to ignore the DTR signal as follows. Type: AT&D0 (set modem to ignore DTR) AT&WZ (saves the settings to power-up profile) Mac Serial Port When you connect your modem to a Macintosh computer, make sure the cable is a hardware handshaking type. These cables are readily available. Macintosh Lisa model 128 and 512 don't have hardware handshaking. The serial port on these (very outdated) models is provided as a 9-pin connector similar to that of a PC. The serial port on all other Macintosh models is a Mini-8. 24 Basic Modem Operation

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24
Basic Modem Operation
ZyXEL Serial/Parallel I/O Card
For high-speed PC to modem communication, ZyXEL produces a
special I/O adapter card. This card includes a serial port and a
parallel port, each with special features, particularly when working
with a ZyXEL modem, for example:
The serial port is 16550-compatible for most communication
software usage. It has a speed of up to 460.8Kbps and data loss
errors will not occur when working with a ZyXEL modem's serial
port. This solves high-speed communication problems in Windows
and other multi-tasking systems. The serial port has a 32-byte
transmission and a 32-byte receival FIFO to increase
communication program efficiency.
Helpful Hints for Mac Computers
Special AT Command Settings for Mac
For operation with Mac computers, you may use the factory default
settings with one exception. You must set the modem to ignore the
DTR signal as follows.
Type:
AT&D0<enter>
(set modem
to ignore DTR)
AT&WZ<enter>
(saves the settings to power-up profile)
Mac Serial Port
When you connect your modem to a Macintosh computer, make
sure the cable is a hardware handshaking type. These cables are
readily available. Macintosh Lisa model 128 and 512 don't have
hardware handshaking. The serial port on these (very outdated)
models is provided as a 9-pin connector similar to that of a PC. The
serial port on all other Macintosh models is a Mini-8.