User's Manual

Appendix C S-Registers
Man_455U-D Rev 3.01 Page 79
S12 = 6 “BUSY” response from remote modem on dial request.
S12 = 7 Character received from host while attempting to connect
S12 = 8 Hang-up from remote modem.
S13 0-255 Spare Function Not Implemented
S14 0-255 Max Packet (0–1020 bytes) Max Packet size = S14 x 4. Default 255.
S15 0-255 Break Length (Not
Implemented)
Minimum time to send “BREAK” signal.
Units 20 milliseconds.
S16 0-255 Transmit Hold-off (0-12.75
Sec)
How long to disable transmitting after
transmitting a message (Units 50
milliseconds)
S17 0-255 Receive Hold-off (0-12.75
Sec)
How long to disable transmitting after
receiving a message (Units 50 milliseconds)
S18 0-255 RS-232 Serial Rx Buffer
Threshold
This register indicates the number of
characters to be received into the RS-232
serial receive buffer before beginning radio
transmission. (default 0)
S19 0-255 RS-232 Serial Rx Timeout If there is data in the RS-232 serial receive
buffer, and no data is received on the serial
port for this time, radio transmission will
begin regardless of the setting of S18. A
value of zero disables the timeout, so the
modem will not transmit until there are at
least S18 characters in the receive buffer.
S20 0-255 RS-485 Serial Rx Buffer
Threshold
This register indicates the number of
characters to be received into the RS-485
serial receive buffer before beginning radio
transmission.
S21 0-255 RS-485 Serial Rx Timeout If there is data in the RS-485 serial receive
buffer, and no data is received on the serial
port for this time, radio transmission will
begin regardless of the setting of S20. A
value of zero disables the timeout, so the
modem will not transmit until there are at
least S20 characters in the receive buffer
S22 0-255 Default System Address –
High Byte
System address is set to this value when
factory defaults restored. This register is not
affected by the AT&F command.
S23 0-255 Default System Address –
Low Byte
System address is set to this value when
factory defaults restored. This register is not
affected by the AT&F command.