Polycom DOC2237A Hardware Installation Manual page 138

Chapter 4 - Hardware Description
4-66
• The LAN-IO Card connects one H.323 connection from the MGC rear
panel to an H.323 Network Interface Module.
Figure 4-39: One H.323 Network connection
• The Music-IO Card enables importing audio music from an external
source such as a CD player, tape, radio, etc. It includes a Line-in jack and
headphone output. The music is available to all endpoints.
MUSIC
LINE IN
Figure 4-40: Music-IO card