Kwikbit Inc. PTP55DP Manuale Utente
M4-2000
User Guide
Kwikbit M4-2000 User Guide
Confidential & Proprietary
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The background monitor operates by iterating over the channel plan and collecting a signal
measurement for each frequency.
The background monitor very briefly tunes the radios to the target frequency, listens just long
The background monitor very briefly tunes the radios to the target frequency, listens just long
enough to collect a measurement, and then resumes operation on the current frequency. These
ongoing measurements create small gaps in the bearer plane which effectively consume a small
ongoing measurements create small gaps in the bearer plane which effectively consume a small
percentage of the airlink, reducing available bandwidth and slightly increasing maximum latency.
The background monitor operates at a rate controlled via the parameter
The background monitor operates at a rate controlled via the parameter
m4gNlosPtpCfgPriBandRefresh.0
BandRefresh can be set to low, medium, or high. Select the rate that provides the optimal trade-off
between the amount of gap time introduced (and the resultant loss of airlink capacity) and the time
required to refresh the measurements over the entire channel plan.
A setting of “low” consumes approximately 1% of the airlink and will refresh the entire channel
plan in about 20 seconds; a setting of “high” will consume approximately 4% of the bandwidth
required to refresh the measurements over the entire channel plan.
A setting of “low” consumes approximately 1% of the airlink and will refresh the entire channel
plan in about 20 seconds; a setting of “high” will consume approximately 4% of the bandwidth
while refreshing the channel plan in about 5 seconds.
Normally “low” should be sufficient, the high band refresh is intended to address highly varying
Normally “low” should be sufficient, the high band refresh is intended to address highly varying
interference environments where more rapid measurement accumulation may provide improved
channel selection when hopping around.
DCS Operation: airlink quality optimization
Whenever DCS is enabled the airlink quality is continually monitored. If the link degrades
sufficiently, (triggered by a drop in MCS level to below 2,) the system will quickly hop to an
channel selection when hopping around.
DCS Operation: airlink quality optimization
Whenever DCS is enabled the airlink quality is continually monitored. If the link degrades
sufficiently, (triggered by a drop in MCS level to below 2,) the system will quickly hop to an
alternate channel.
A channel hop may also be triggered when some alternate channel remains sufficiently better
A channel hop may also be triggered when some alternate channel remains sufficiently better
(approximately 9 db lower background RSSI measurement value) over some period (approximately
5 measurement periods) compared to the current channel.
5 measurement periods) compared to the current channel.
4.7 Ethernet operation
The M4-2000 system utilizes Gbit Ethernet interfaces for customer data network(s) and the
management data network. On each M4-2000 unit there are two RJ45 connectors for customer
data and one RJ45 connector for the management LAN. The unit operates with an internal,
data and one RJ45 connector for the management LAN. The unit operates with an internal,
managed layer 2 switch where the management interface is preprogrammed to connect to the
internal IP stack of the device itself. This connection is used for operation, configuration and
internal IP stack of the device itself. This connection is used for operation, configuration and
management of the device.
4.7.1 Customer Data Network
The Ethernet traffic of the three data interfaces is switched over the airlink to the remote unit based
on configured internal switch options. Following are highlighted features of the integrated switch
capabilities:
capabilities:
• 2,048 byte jumbo frame support
• 8K MAC addresses
• QoS
• QoS
o
4 queues per port
o
802.1p, port, TOS/DS, IPv6, TC, MAC
o
Programmable QoS Weighting