L CHANNEL NUMBERS AND
MULTICAST ADDRESSES
As part of the Telos Infinity family of products, Infinity Link Gateway supports L AES67 and
receives its output channel information from the Dashboard software as a L channel.
Each L channel number has a corresponding multicast IP address. Since L 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).
L devices on the network will automatically resolve to a L channel number while non-
L AES67 devices will display the multicast address.
Avoiding duplicate addresses and the resulting conflicts is critical, and so knowing how to convert a
L channel number to a multicast address is handy when determining whether or not non-
L devices exist on the network with a multicast address that falls within the range assignable
by Dashboard.
The first two octets of a standard L source will be 239.192. To derive the third octet, divide the
L 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 L
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.
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