User manual

26: Terminal Server

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# Number of TCP keep alive probes to send before connection closed

option tcp_keepalive_count 1

# Maximum time in milliseconds for TCP to wait for transmitted data to

be acked

# before closing connection in established state. Set to 0 to use

kernel defaults (about 15-20 minutes)

option tcp_user_timeout 20000

# 1=disable TCP nagle algorithm; 0=normal operation

option tcp_nodelay 0

# rs232 - RS-232 mode, rs485hdx - rs485 2 wire half duplex mode in

which transmitter drives RTS. rs485fdx - RS485 4 wire full duplex mode.

'v23' - using V.23 leased line card driver. x21 - use USB serial card in

sync mode

option portmode 'rs232'

# On newer GW202x boards, the serial mode (RS232, RS485) for the second

physical port is set with GPIOs, while on older boards it is set with the

dip switches

# 1=On this port, the serial mode is set using GPIO; 0=Default, serial

mode is set with dip switches

option serial_mode_gpio_control 0

# Driver DTR and RTS line control modes. 'auto' - set ON when the port

is open, OFF when the port is closed, 'on' - always on, 'off' - always off,

'app' - controlled by the application, 'ontx' - in HDLC mode, RTS ON during

frame TX

option dtr_control_mode 'auto'

option rts_control_mode 'auto'

# enables or disables RS485 line termination (applies only if portmode

is 'rs485')

option rs485_line_termination '0'

# 1=use USB serial card. if portmode is x.21 it is used in synchronous

mode, if portmode is 'rs232' it is used in asynchronous mode

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GW1000 Series User Manual

Issue: 2.4 Page 188 of 255