Hardware manual

80-001113 SysLINK Administrator’s Guide Page 78
CONNECT 38400
28
Connected – Serial Port Speed is 38400 baud
CONNECT 57600
18
Connected – Serial Port Speed is 57600 baud
CONNECT 115200
31
Connected – Serial Port Speed is 115200 baud
CONNECT 230400
65
Connected – Serial Port Speed is 230400 baud
Modem Signal Behavior
The gateway serial ports should be set to DCE mode when modem emulation is enabled. A
DCE port is designed to be connected to a DTE device via a straight-through cable. Refer to
the gateway hardware manual for specific pinout information for your unit.
To emulate a modem properly, the gateway does the following:
Mode
Modem DCD
Settings
Behavior
Command/Data
Always on
(&C0)
DCD is asserted
Follow
connection
(&C1)
DCD is asserted only when TCP/IP connection is
present and has been accepted via ATA or auto-answer.
DCD is de-asserted when connection is lost
The gateway monitors the device's DTR signal. The following behaviors occur on loss of
DTR only.
Mode
Modem DTR
Settings
Response to loss of DTR
Offline
AT&D0
Ignore
AT&D1
Ignore
AT&D2
Ignore
Online
AT&D0
Ignore
AT&D1
Drop to command mode, preserving connection
AT&D2
Drop to command mode, terminating any connection