Microwave Data Systems MDS entraNET 900, Системное руководство

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50 MDS entraNET 900 System Guide (Preliminary) MDS 05-4055A01, Rev. A
Ethernet Packet
Statistics
•
Packets received
—Packets received by the transceiver
through the Ethernet port.
•
Packets sent
—Packets received by the transceiver through
the Ethernet port.
•
Bytes received
—Data bytes received by this Remote.
•
Bytes sent
—Data bytes sent by this Remote.
•
Packets dropped
—Received packets dropped as a result
of a lack of buffers.
•
Receive errors
—Packets discarded after exceeding five
retries the network.
•
Lost carrier detected
—A count of how many times
the carrier signal on the Ethernet port has been missing. This
count increase significantly when the Ethernet cable is plugged
in and unplugged.
•
Clear Ethernet stats
—Resets the statistics counter.
Wireless Network Status
(Remotes Only)
The Wireless Network Status screen provides information on a key
operating process of the transceiver—the association of the Remote with
the Access Point. The following is a description of how this process
takes place and as monitored on the
Figure 2-28. Wireless Network
Status Screen" on page 51 .
The Association
Process
After the Remote is powered up and finishes its boot cycle, it begins
scanning the 900 MHz band for beacon signals being sent out from AP
units. If the Remote sees a beacon with a Network Name that is the same
as its own, the Remote will stop its scanning and temporarily synchro-
nize its frequency-hopping pattern to match the one encoded on the AP’s
beacon signal. The Remote waits for three identical beacon signals from
the AP and then it toggles into a fully synchronized “associated” state.
If the Remote does not receive three identical beacons from the Access
Point unit within a predetermined time period, the Remote returns to a
scanning mode and continues to search for an AP with a matching net-
work name in its beacon.
Under normal circumstances, the association process should be com-
pleted within 20 seconds after boot-up.
Remote units are always monitoring the beacon signal. If an associated
Remote loses the AP’s beacon for more than 20 seconds, the association
process starts again.