Livewire+ Channel Numbers and Multicast Addresses

The Telos Infinity family of products supports Livewire+ AES67 and receives its output channel information from Infinity's Dashboard software as a Livewire+ channel.

Each Livewire+ channel number has a corresponding multicast IP address. Since Livewire+ channels are assigned by Dashboard, their multicast addresses will inherently fall within the available range which is between 1 and 32767. The range of channels available to Infinity can be managed when setting up the Dashboard software (please see the Dashboard user manual for detailed information).

Livewire+ devices on the network will automatically resolve to a Livewire+ channel number while non-Livewire+ AES67 devices will display the multicast address.

Avoiding duplicate addresses and the resulting conflicts is critical, and so knowing how to convert a Livewire+ channel number to a multicast address is handy when determining whether or not non-Livewire+ devices exist on the network with a multicast address that falls within the range assignable by Dashboard.

The first two octets of a standard Livewire+ source will be 239.192. To derive the third octet, divide the Livewire+ channel number by 256, rounding the product to the nearest whole number. To determine the fourth octet, multiply the value of the third octet by 256 and subtract the product from the Livewire+ channel number.

Using Channel 401 as an example:

• Solve for X

  • 239.192.X.Y

  • 401 / 256 = 1.56

  • X = 1

• Solve for Y

  • 401 - (1 * 256) = 145

  • Y = 145

The multicast address of Channel 401 is then 239.192.1.145.