MDS 05-2806A01, Rev. E.1
MDS iNET 900 Series User’s Guide
117
Packet Statistics Menu
(See
Packet Statistics Menu on Page 81
)
This screen provides detailed information on data exchanges between
the unit being viewed and the network through the wireless and the
Ethernet (data) layers. These include:
The most significant fields are the Packets Dropped, Retries, Retry
Errors, Receive Errors and Lost Carrier Detected. If the data values are
more than 10% of their sent and received counterparts, or the Lost Car-
rier Detected value is greater than a few dozen, there may be trouble
with radio-frequency interference or a radio link of marginal strength.
Review the RSSI by Zone Screen’s values (
Page 77
) for zones that are
more than 2 dB (decibels) below the average level, and for signal level
values that are likely to provide marginal service. For example, an
average level is less than –85 dBm during normal conditions with a data
rate of 256 kbps.
If the RSSI levels in each zone are within a few dB of each other, but
less than –85 dBm, then a check should be made of the aiming of the
antenna system and for a satisfactory SWR. Refer to
RADIO (RF) MEA-
SUREMENTS on Page 123
for information on antenna system checks.
NOTE:
For a data rate of 512 kbps, the average signal level should be
–77 dBm or stronger with no interference.
Serial Port Statistics Menu
(See
Serial Data Statistics Menu on Page 87
)
This screen provides top-level information on data exchanges between
the unit’s serial ports and the network through the wireless and the
Ethernet (data) layers. These include:
Wireless Packet Statistics
• Packets received
• Packets dropped
• Packets sent
• Receive errors
• Bytes received
• Retries
• Bytes sent
• Retry errors
Ethernet Packet Statistics
• Packets received
• Packets dropped
• Packets sent
• Receive errors
• Bytes received
• Retries
• Bytes sent
• Retry errors
• Lost carrier detected
• Bytes In On Port
xxx
• Bytes In On Socket
xxx
• Bytes Out On Port
xxx
• Bytes Out On Socket
xxx
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