Microwave Data Systems MDS entraNET 900 System Manual page 99

MDS 05-4055A01, Rev. A
Ethernet Packet Statistics
• Packets received
• Packets sent
• Bytes received
• Bytes sent
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.
Look over the RSSI by Zone Screen's values
more than a couple of dBs (decibels) below the average level, and for
signal level values that are likely to provide marginal service. For
example, the average level is less than –85 dBm during normal condi-
tions with a data rate of 115.2 kbps.
If the RSSI levels in each zone are within a few decibels (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. Call in a radio tech-
nician to deal with wireless issues. Refer the technician to the
MEASUREMENTS on Page 96
checks.
NOTE: For a data rate of 115.2 kbps, the average signal level should
be –77 dBm or stronger.
Serial Port Statistics Menu
(See Serial Data Statistics Menu on Page
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:
• Bytes In On Port xxx
• Bytes Out On Port xxx
You can use this screen as a barometer of port activity at the data and IP
levels.
Diagnostic Tools
(See MAINTENANCE on Page
The radio's Maintenance menu contains two tools that are especially
useful to network technicians—the Radio Test Menu and the Ping
Utility. The Radio Test selection allows for testing RF operation, while
the Ping Utility can be used to verify reachability to pieces of equipment
connected to the network. This includes entraNET 900 transceivers as
well as user-supplied Ethernet devices.
MDS entraNET 900 System Guide (Preliminary)
• Packets dropped
• Receive errors
• Retries
• Retry errors
• Lost carrier detected
(Page
for information on antenna system
36)
• Bytes In On Socket xxx
• Bytes Out On Socket xxx
58)
46) for zones that are
RADIO
91