Q.
> I try to install Access Point SNMP Config utility, but i can't find
> menu.h file.
> [root@server src]# make
> gcc -O2 -Wall    -c -o ap-cnf.o ap-cnf.c
> ap-cnf.c:24:18: menu.h: No such file or directory
> make: *** [ap-cnf.o] Error 1
A.
You need to install ncurses and ncurses-devel packages from your distro.
Or just build and install ncurses libs from sources.

Q.
> I bought a access point. Unfortunately, the
> documentation does not have the default community string used by the
> product. Do you know what it is, or where I could find it out?
A.
I'm give you default communities from my equipment, may be you may use
it with your AP: "public", "private", "linksys".
Also consult documentation to your AP.

Q.
> The wireless & ethernet stats are reset to zero each time I grab
> the KnownAP signal and quality stats.  The same issue happens when
> performing KnownAP's running your AP-CNF program without modification.
A.
Because only way to see KnownAPs info its to put AP to client mode with master
AP mac set to  0000000000. When setting this AP resets. Only one way to get
signal and quality stats not resetting AP - its to get this stat from AP
setted in client mode all time.

Q.
>Can someone give me the "newbe" answer to what's the
>relationship/difference between RSSI and Link Quality?

A.
RSSI = Received Signal Strength Indication. Measures only the signal
amplitude. This plays a major role in calculating the fade margin of the
link. 
The Signal Quality represents how clean the signal is. Interference,
Multi path Reflections etc. This measure plays a major role in
determining the data throughput. Low Signal Quality would normally mean
retransmissions, dropped packets etc.