what kind of audio signal is carried over Conference Link / Conference Link2?
Is the audio from a conference link device, such as a Polycom Realpresence Group codec or a Polycom Ceiling Mic, considered an analog audio signal like a traditional microphone / program audio source?
No. The signals that are transmitted between the SoundStructure device and a connected Conference Link Device (such as a group series or a polycom ceiling microphone) are kept as digital signals. No analog signals are transmitted between the SoundStructure device or the Polycom Video Codec video conferencing system when connecting to the Polycom Video Codec system with the Conference Link2 interface.