Eurotech ZyWAN, Руководство пользователя

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ZyWAN - User Manual
96 110150-1001F
FIELD/OPTION EXPLANATION
Buffer Size Enter the maximum number of data bytes (between 1 and 4095)
which are allowed in an IP packet. The actual amount may be
less if the Demark Timer times out before the serial buffer is full.
This Buffer Size works both ways –network originated packets
are sent to the serial port in blocks of bytes, and data coming in
the serial port are broken into network packets of the configured
number of bytes.
Demark Timer
Enter the maximum time (in milliseconds, between 10 and
30000) the ZyWAN waits for non-activity on the serial port
before sending whatever serial data has been received.
Reconnect Delay Enter the length of time (in seconds, between 1 and 65535) the
Terminal Client waits before attempting to re-establish a lost
connection with the server, if the connection has been dropped
for any reason. This option only applies when the
Connect
Mode is set to Continuously .
Connect Mode
Choose the connection mode. The options available are:
Continuously : Connect automatically upon system restart or
upon either device dropping the IP connection. There must be
only one Host Connection row, and its Matching Dial String field
must be left empty.
Any Data : Connect only when data is received from a serial
device connected to the COM Port. There must be only one
Host Connection row, and its Matching Dial String field must be
left empty.
ATDT String : Connect only if an ATDT### message is received
on the serial port, where ### is some alphanumeric string.
There may be many Host Connection rows configured under this
Terminal Client, with their Dial String set to unique ATDT###
values.
The ATDT mode acts as a modem emulator, whereby each
ATDT dial sequence initiates a connection to an IP address.
Until a matching dial string is received, the ZyWAN does not
make an outbound Terminal Client connection. See Matching
Dial String for more details.
Use DCD Pin : Connect if the Data Carrier Detect (DCD) input
signal on the serial port is raised to a positive RS-232 voltage.
This must be used with an RS-232 port and does not apply
when COM3 uses the RS-485 hardware option. There must be
only one Host Connection row, and its Matching Dial String field
must be left empty.
ATDT or DCD
: Connect if either
ATDT###
message is received
or if the Data Carrier Detect (DCD) signal on the serial port is
asserted. If the ATDT message is received, it is compared
against the Matching Dial String in the Host Connection rows to
find which IP address to use for connection. If the DCD is
received, the ZyWAN is connected to the IP address of the first
Host Connection row with an empty field for the Matching Dial
String .
Serial Driver Select whether to use the Native Linux (ttyS) serial driver or the
ACSCOMM Eurotech driver. The ACSCOMM option allows for
half-duplex RS-485 communication, and it can provide better
handling of hardware flow control if needed.