4RF Aprisa SR+ User Manual - page 101
Managing the Radio | 99
Aprisa SR User Manual
Serial > Advanced
This page provides the setup for the serial port advanced settings.
SERIAL PORT ADVANCED
Serial Data Priority
The Serial Data Priority controls the priority of the serial customer traffic relative to the Ethernet
customer traffic. If equal priority is required to Ethernet traffic, this setting must be the same as the
Ethernet Data Priority setting (see ‘Ethernet Data Priority’ on page 107).
The serial data priority can be set to Very High, High, Medium and Low. The default setting is Very High.
A queuing system is used to prioritize traffic from the serial and Ethernet interfaces for over the air
transmission. A weighting may be given to each data type and this is used to schedule the next
transmission over the air e.g. if there are pending data packets in multiple buffers but serial data has a
higher weighting it will be transmitted first. The serial buffer is 20 serial packets (1 packet can be up to
512 bytes).
There are four priority queues in the Aprisa SR: Very High, High, Medium and Low. Data is added to one of
these queues depending on the priority setting. Data leaves the queues from highest priority to lowest:
the Very High queue is emptied first, followed by High then Medium and finally Low.