B&B Electronics, Inc.
SPECTRE Configuration Manual
68
710-10001-02 Rev. 3.0
www.bb-elec.com
www.bb-europe.com
1.24. Expansion Port Configuration
You may send and receive data from a serial port on Auxiliary Port 1 or 2 using UDP or
TCP protocol on the Ethernet network. This feature allows a computer on the network to send
data to a serial device as if it was physically connected to the computer. You can also configure
2 routers to act as a serial port extender where they transmit data transparently across the
Ethernet network between 2 serial devices as if the serial devices were cabled together.
You must be using a router which has the RS-232 or RS-485 option on Port 1 or 2.
Item
Description
Baud rate
Communication speed.
Data Bits
Number of data bits.
Parity
Control parity bit
none
even
odd
Stop Bits
Number of stop bits.
Split Timeout
Inter-character Timeout. If no characters are received within this amount
of time, any buffered characters will be sent over the Ethernet port.
Protocol
Protocol:
TCP
UDP
Mode
Mode of connection:
TCP server - The router will listen for incoming TCP connection
requests.
TCP client - The router will connect to a TCP server
on the specified IP address and TCP port.
Server
Address
When set to
TCP client
above, it is necessary to enter the
Server
address
and
TCP port
.
TCP Port
The TCP port for connections.
Table 52: Expansion PORT configuration
If the
Check TCP connection
is selected, the router will automatically send TCP keep-
alive messages to verify that the connection is still valid.
Item
Description
Keepalive Time
Time between sending keep-alive packets
Keepalive Interval
Keep-alive Response Tiimeout
Keepalive Probes
Number of attempts before connection is down
Table 53: TCP Keep-Alive Configuration
