Managing the Radio | 131
Aprisa SRi User Manual 1.1.0
Mode
This parameter defines the mode of operation of the serial port. The default setting is Standard.
Option
Function
Disabled
The serial port is not required.
Standard
The serial port is communicating with serial ports on other
stations.
Mirrored Bits ®
Mirrored Bits® is a serial communications protocol used to
exchange internal logic status messages directly between relays
and devices used in line protection, remote control and
monitoring, relay remote tripping, sectionalizing and other such
applications. The protocol is often described as a relay-to-relay
communications technology.
Terminal Server
A base station Ethernet port can communicate with both Ethernet
ports and serial ports on remote radios.
RS-
232 traffic is encapsulated in IP packets (see ‘
Terminal Server on page 138).
SLIP
IP packets are encapsulated over RS-232 interface port
(see ‘
Serial Line Interface Protocol (SLIP)
141).
MTU Size (bytes)
This parameter sets the size of the packet in bytes received before it is transmitted if an inter-frame gap is
not detected. The default setting is 512 bytes.
Baud Rate (bit/s)
This parameter sets the baud rate to 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 or 115200 bit/s.
The default setting is 115200 bit/s.
Character Length (bits)
This parameter sets the character length to 7 or 8 bits. The default setting is 8 bits.
Parity
This parameter sets the parity to Even, Odd or None. The default setting is None.
Stop Bits (bits)
This parameter sets the number of stop bits to 1 or 2 bits. The default setting is 1 bit.