So, we’ve been having some issues with a single PMP320 AP which is the most heavily loaded AP on our network. We’ve been brainstorming with Cambium support, but we still don’t have any resolution to these issues. One is a random reboot (no, not the Extended Range issue!), and the other is poor performance on radios - some have markedly lower RSSI values than they did, but even some which have reasonably good RSSI are dropping so many packets the connections are nearly useless.
Meanwhile, I came across this in the A&C Guide:
Map Symbol: set this value to the default value of 5. The Map Symbol is part of the
physical layer which is a pointer to the data burst. The DL MAP and UL MAP
messaging handles resource management such as subchannel allocation and burst
start times. The data burst comprises the Preamble, Compressed DL Map, Frame
Control Header, Compressed UL Map, and the Broadcast Message, such as the
Downlink Channel Descriptor. Map Symbol 5 is used as the normal processing case to
maximize the downlink sector throughput. Map Symbol 7 is used when the capacity
of the number of CSMs supported by Map Symbol 5 has been reached. Using Map
Symbol 7 causes about 10 percent reduction in the data resources for the DL sector
throughput. Map Symbol 7 can be used when the operator has to configure a large
number of CSMs in a given sector with multiple data delivery types provisioned per
CSM.
Has anyone switched this value to 7? If so, where did you find the threshold of connected CSMs where you felt it helped? What effects were observed?
TIA! Yup, lots of questions…