Month: May 2022

A question that is commonly asked is – “Can I change the multicast subnet that SVSI uses”? And the answer is “Yes”!

Before we dive into the how, let us look at which subnets are used in SVSI for audio and video traffic.

These values represent non-interleaved multicast streams (N2300 series use interleaved multicast streams and are not part of this addressing range) and stream numbers < 256. Stream numbers >256 require calculating the large stream number (third octet) (covered in the Networked AV Training Course).

• Video: 239.255.37. <stream number>
• Audio: 239.255.165. <stream number>

The subnet range above (in red) is what we are interested in modifying.
Things to consider when choosing a multicast subnet:
 Chose an address range between 234.0.0.0-238.255.255.255, this is the largest
unallocated block.
 Because there is an overlap of IP Multicast addresses to Ethernet MAC multicast addresses,
any multicast address in the [224-239].0.0.x and [224-239].128.0.x ranges should NOT be
used.

We use AMX’s “N-Able” software to modify the range (downloadable at amx.com).

• Launch N-Able on your PC.
• Make sure your devices have been “discovered” or added and are visible in the “Unit Management” tab.
• Navigate to “Tools” -> “Batch Config” and select “Set Multicast to:” (circled below).
• Enter your desired subnet.
• Select the devices that you wish to modify (red arrow below) and click “ok”

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New audio solutions exhibited for the UC market

Xilica showcased its latest UC audio solutions, which were compared to ‘black magic’ by a Xilica exec at Barcelona ISE.

Shaun Robinson, VP of Product Management at Xilica, explained that this description refers to the huge amount of mathematics that goes into its audio solutions. Out of the complexity, Robinson says its solutions have been made easy to use, plug and play devices.  

The collaboration product designer’s range includes room kits, processors, network endpoints, speakers, user interfaces and accessories.  

Some of the speakers it showcased required only a single point of connection.  

Robinson explained the advantages of reduced cabling:

“We have USB that connects to a computer or laptop. Everything else is connected, including the speakers, so we did not put any audio connections on the speaker itself.  

“IT technicians don’t need to be worried about keeping stock of speaker cables, stripping speaker cables or accidentally getting polarity wrong; all the things that audio installers would do.  

“We do not want technicians having to do that, so just grab a patch cable or any other Ethernet cable and plug it into our amp, plug it in our speaker, and it’s going to work.”  

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