Soundstructure Device Discovery; Amx Beacon - Polycom SoundStructure C16 Design Manual

Note: Received Acknowledgments for Control Sessions
Control sessions receive acknowledgments for commands entered in that session
and only receive command acknowledgments from other command sessions if the
other command sessions change the value of a parameter.

SoundStructure Device Discovery

SoundStructure Studio uses a discovery mechanism for identifying SoundStructure devices on the network.
SoundStructure Studio sends a UDP discovery broadcast using port 52774 and all SoundStructure systems
that receive the broadcast will respond and identify themselves.
If the IP address changes on the SoundStructure device, such as if the dynamic IP address lease expires
and a new IP address is received, it may take up to 75 seconds for the discovery mechanism to restart.
This discovery mechanism only creates network traffic when SoundStructure Studio is discovering devices
caused by the user opening the Connect to Devices window.
Because both the discovery and command channels use port 52774, traversing firewalls only requires
opening port 52774 for both UDP (for discovery) and TCP (for commands) to allow for remote access of the
SoundStructure device.
Depending on the network router configurations in the network, SoundStructure device discovery may not
work across different subnets. However it is still possible to remotely configure SoundStructure devices if
the IP address of the device is known as the IP address may be typed in directly in the Connect to Devices
user interface.

AMX Beacon

The SoundStructure devices comply with the AMX Dynamic Discovery Protocol and send a UDP broadcast
to multi-cast address 239.255.250.250 port 9131 at random intervals between 30 to 60 seconds.
The broadcast beacon depends on the particular SoundStructure device model and is formatted as shown
below.
AMXB<-UUID=001122334455><-SDKClass=AudioConferencer><-Make=Polycom>
<-Model=SoundStructureC16><-Revision=1.0.0><Config-Name=SoundStructure C16
Configuration> <Config-URL=http://172.22.2.109/>
where 001122334455 is the MAC address of the SoundStructure C16 device in this example.
Polycom, Inc. 278