Sony PCS-G70 Operating Instructions Manual page 148

Note
While you are transmitting the computer picture, you cannot receive a still image or a
computer picture from any other terminal. Ending your transmission enables you to
receive it. When you are receiving a still image or computer picture from any other
terminal, you cannot transmit a computer picture from equipment connected to the Data
Solution Box.
To transmit the picture from a computer to multiple points
If you install the optional PCSA-M3G70 H.323 (for LAN) or PCSA-M0G70
H.320 (for ISDN) MCU software, you can transmit the picture from the
computer to multiple points.
Picture quality of the data solution box
The picture quality received by the remote party varies depending on the type
of the terminal or connecting method, or "Monitor Out (or Sub Monitor Out)"
setting on the remote site. Using the Data Solution Box on the remote site
enables receipt of a high-quality computer picture with larger number of
frames.
148
Using Audio/Video Signal from the Connected Equipment for a Conference