Are Powerline adapters of different brands ‘cross compatible’ with each other?
Yes, though the physical components are different. It is the same functionality / concepts.
For BEST results, both wall outlets should be on the same circuit breaker panel (though this may not be absolutely required) . This is not usually addressed in product manuals or quick start guides. In my experience it can be factor of intermittent connectivity and distance range issues.
Also, do NOT connect into a power strip, extension cord, uninterrupted power supply (UPS), or surge protector. This is usually advised in user manuals.
We have been using power line Ethernet adapters in IP Surveillance Camera applications.
Thanks. Please tell , is 'circuit breaker panel' same as 'fuse box'?
That's an excellent question. The answer is yes - in part! As long as they both use the same standard (e.g. 200 AV) then they will communicate with each other just like any ethernet cards or WiFi adapters will. This is true both for basic connections and encrypted ones.
The "partly" bit is that extra features which are built into many Powerline adapters. For example, certain nework-extension features will only work if both the "main adapter" and the "secondary adapter" are from the same family, and software for monitoring/controlling the adapters is obviously specific to each make (sometimes to each model of adapter).
Thanks. Please tell that 'fuse box' is same as 'circuit breaker panel'?
Yes, that's what I mean. These boxes go by all sorts of popular names around the world but the proper engineering term for them (at least in the UK) is "consumer unit". It is where the electricity enters the house and where the fuses/circuit breakers, RCDs etc are located.