| Livewire+ | |
| Manufacturer: | Axia Audio, a brand of Telos Alliance |
| Switchable: | Yes |
| Routable: | Yes |
| 100Meg: | yes |
| 1Gig: | yes |
| Latency: | 0.75 ms[1] |
| Samplingrate: | 48 kHz |
| Bitdepth: | 24 bits |
Livewire is an audio-over-IP system created by Axia Audio, a division of Telos Alliance. Its primary purpose is routing and distributing broadcast-quality audio in radio stations.
The original Livewire standard was introduced in 2003 and has since been superseded by a second version, Livewire+. Livewire+ includes compatibility with the AES67 and Ravenna standards to allow interoperability with equipment from other manufacturers. Designed as a superset of Livewire functionality utilizing common protocols and formats, Livewire+ is available as an open standard through Axia's Livewire+ Partner Program.
Livewire+ provides flexible routing and transport of audio streams using multicast networking, with the ability to connect any input to any output (known as "anywhere-to-anywhere routing"). Distribution utilises standard IP and Ethernet over twisted pair cabling.
The following table lists ports and protocols used in Livewire systems.[2] [3] [4]
| Port | Protocol | Multicast Address | Purpose | Notes | |
|---|---|---|---|---|---|
| 67, 68 | UDP | BOOTP Server/Client | Remote IP address assignment | ||
| 93 | TCP | Livewire Routing Protocol | Also provides transparent passing of custom messages, similar to the Ancillary Data Transmission feature of AES3 | ||
| 123 | UDP | Network Time Protocol | |||
| 514 | UDP | Syslog | Activity logging to a syslog receiver. | ||
| 2055 | UDP | 239.192.255.4 | Multicast-based GPIO (CMsg2 protocol) | GPIO commands, GPIO node → console-type endpoint | |
| 2060 | UDP | 239.192.255.4 | Multicast-based GPIO (CMsg2 protocol) | GPIO commands, console-type endpoint → GPIO node | |
| 4000 | UDP | Livewire Advertisement and Source Allocation Protocol | Verbose advertisement and source allocation requests | ||
| 4001 | UDP | 239.192.255.3 | Livewire Advertisement and Source Allocation Protocol | Periodic and verbose announcements;Source allocation state announcements and responses | |
| 4002 | UDP | 239.192.255.3 | Engine Supervision Protocol | ||
| 4010 | TCP | Livewire Control Protocol | |||
| 4011 | UDP | 239.192.255.4 | LWCP for Accessory Modules | Module → Console | |
| 4012 | UDP | 239.192.255.3 | LWCP for Accessory Modules | Console → Module | |
| 5004 | UDP | 239.192.x.x | RTP Livewire Audio | Last two address octets pertain to Axia channel ID, e.g. 9999 = 39 15 (hex 27 0F) | |
| 7000 | UDP | Livewire Clock | One device assigns itself as LAN-wide reference, all other devices slave to it | ||
| 9997 | TCP | Protocol logging | Debug protocol logging for Element |