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Default Modem Settings for PC’s....................................................................3-7
ZyXEL Serial/Parallel I/O Card .....................................................................3-8
Helpful Hints for Mac Computers..................................................................3-8
Special AT Command Settings for Mac ...........................................................3-8
Mac Serial Port.............................................................................................3-8
Mac Software Tips.........................................................................................3-8
Helpful Hints for UNIX-Based Computers..................................................... 3-9
Serial Cable..................................................................................................3-9
Basic Modem Settings for UNIX.....................................................................3-9
Unix Software Tips........................................................................................3-9
Chapter 4 - Advanced Data Communications...............4-1
Front Panel LEDs........................................................................................... 4-1
DTE Interface................................................................................................. 4-2
Synchronous and Asynchronous Communications............................................4-2
UART ...........................................................................................................4-2
Serial Port....................................................................................................4-2
RS-232C or EIA-232D/E................................................................................4-3
Serial RS-232C Cable....................................................................................4-3
Communication Protocols and Speeds ...........................................................4-3
Universal Protocol Compatibility...................................................................4-4
Choosing the Modem Link Options.................................................................4-4
Setting the DTE to DCE Rate .........................................................................4-5
Error Control..................................................................................................4-5
Data Compression.......................................................................................... 4-6
Hardware or Software Flow Control............................................................. 4-7
Chapter 5 - Synchronous Mode Operation ...................5-1
V.25bis Command Set.................................................................................... 5-1
Clock Options ................................................................................................5-2
RTS Options................................................................................................... 5-2
Command State Options .................................................................................5-2
Dialing from Synchronous Mode.................................................................... 5-3
Answering from Synchronous Mode ..............................................................5-3
Chapter 6 - Leased Line Operation ...............................6-1
Connecting to a 2-Wire Leased Line..............................................................6-1
Leased Line Handshaking...............................................................................6-1
Terminating a Leased Line Connection .......................................................... 6-2