I currently have a Polycom Voicestation 300 (2201-17910-001) base, and a Polycom Soundstation 2 Wall Module (2201-16020-601). Are these units compatible? Or will I need to purchase the VOicestation 300/500 Wall Module (2201-17020-601)? Both Wall Modules look exactly the same, just a different part number/label.
Before I saw this response, I took a chance and successfully powered on the VoiceStation 300 base with a SoundStation2 Wall Module. I did not test anything further. I assume it is still not a good idea to use these products together even though it will provide power?