128 | Managing the Radio
Aprisa SRx User Manual 1.3.0
QoS > Traffic Priority
TRAFFIC PRIORITY
Default Management Data Priority
The Default Management Data Priority controls the priority of the Ethernet management traffic relative to
Ethernet customer traffic. It can be set to Very High, High, Medium and Low. The default setting is
Medium.
SERIAL PRIORITY
This parameter controls the per port 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.
The serial data priority can be set to Very High, High, Medium and Low. The default setting is Low.
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.
