Polycom SoundStructure C16 Design Manual page 472

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
Step 2 - Select Outputs
Two mono amplifiers will be selected in this step. The output to the telephone
lines and the output to the HDX 9000 were created when their respective input
components were added to the system in step 1.
Step 3 - Select Equipment
The default equipment selection requires a C8 and a dual telephone line card.
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