Polycom SoundStructure C16 Design Manual page 50

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The OBAM link is bidirectional - data flows in both an upstream and downstream direction meaning that the

bus does not need to be looped back to the first device.

OBAM Connections on a SoundStructure Device

When multiple devices are linked together via OBAM, the SoundStructure devices communicate to each

other, determine which devices are linked and automatically generate internal device identifications. These

device identifications are sequential from the first device at device ID 1 through the latest device linked over

OBAM. Externally, there are no SoundStructure device identifications that must to be set or remembered.

The internal device identifications are not required by the user/designer and are not user settable.

As described previously, rather than referring to physical channels on different devices by using a device

identification number and a local physical input and output number, SoundStructure devices are designed

so that the physical channel numbering is sequential across multiple devices. This allows one to refer to

different channels on multiple devices solely by using a physical channel number that ranges from 1 to the

maximum number of channels in the linked system. As shown next, how the devices are OBAM linked

determines the resulting numbering of the physical channels for the overall system.

To properly link multiple SoundStructure devices, connect the OBAM OUT port on the first device (typically

the top SoundStructure device in the equipment rack) to the OBAM IN port on the next SoundStructure

Polycom, Inc.

PIN 5: GROUND

REMOTE CONTROL 1

REMOTE CONTROL 2

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