Sony PCS-TL50 Operation Manual page 56

Unit
PCS-A300 Microphone
CTE-600 Communication
Transducer
PCS-323M1 H.323 MCU
Software
PCS-320M1 H.320 MCU
Software
22
GB
System Components
Description
Unidirectional microphone. It is recommended when
you want to pick up the voice of a speaker directed
toward the microphone.
Integrated microphone/speaker system suitable for
remote communication. The uni-directional
microphones pick up clear voice with minimum
background noise.
Moreover, the omni-directional speaker outputs
sound equally in all directions.
Allows use for a multipoint videoconference over
LAN connection.
Allows use for a multipoint videoconference over
ISDN connection.