Polycom DOC2237A - Manual (Page 142)

Chapter 4 - Hardware Description
4-70
2. Tighten the screws on the rear panel of the MGC unit to secure the Music
I/O card.
Enabling the Audio Message Daughter Card and Music I/O Card in
the MCU Software
Once the Audio Message daughter card and the Music I/O card are installed,
the system automatically identifies them. However, if you are upgrading the
MCU by adding the Message daughter card and the Music I/O card, you may
have to enable them in the MCU software.
ISDN Network I/F
ATM Network I/F
H.323 Network I/F
MUX
Audio
Video
Data
H.323 I/O
NET I/O
ATM I/O
MUSIC I/O
Rear
Backplane
Front
Main Control
Module
Power Supply
Module