SIP (VoIP) Audio Integration


  • Make tannoy, pa, paging announcements from phones
  • Integrate with local, hosted & cloud SIP telephony
  • Direct & group IP speaker announcement routing
  • SIP gateway option for integration to legacy audio

VoIP & SIP AoIP Audio

Most businesses and commercial organisations have transitioned from traditional to VoIP (Voice over Internet Protocol) for their desk phone and telephony requirements. SIP (Session Initiation Protocol) compliant AoIP audio devices and SIP IP Speakers are able to integrate with the same VoIP SIP telephony service, enabling PA (public address) & ‘tannoy’ paging announcements from phones.

SIP IP Audio & Integration

Network connected SIP compliant IP audio device entities and IP speakers register with the local, hosted or cloud based SIP telephony server for service. From this point, SIP input entities (SIP phones and SIP microphones) can initiate audio broadcasts. IP output entities (SIP IP speakers) are used to playout the audio broadcasts.

SIP Audio Device 'Entities'

  • SIP Audio Input (SIP phones, SIP microphones)
  • SIP Audio Output (SIP speakers)
  • Firmware/Software – usually integrated with a SIP audio device, used to define audio zones, priority and scheduling

How does SIP IP Audio work?

SIP Audio Endpoints & Gateways

IP audio entities register for service from a SIP server in two typical configuration options:

  1. As a SIP ‘endpoint’ – the device entity is directly registered and has an associated SIP extension number (eg. IP speaker).
  2. As a SIP ‘gateway’ – the device entity itself is directly registered with a SIP extension number. However, other IP audio entities (typically IP speakers) communicate for their service and output from this gateway only. 

The choice of which configuration option largely depending on the scale and quantity of IP entities as well as the quantity and functional complexity of audio zones.

For example, a solution requiring SIP tannoy, pa, paging broadcast to 20 IP speakers, but configured only as a single audio zone would be best configured as a SIP gateway with the IP speakers receiving the playout from the gateway.

However, a solution requiring the same 20 IP speakers but configured for 10 audio zones, would be better configured as SIP endpoints to afford the required flexibility and granularity for the zone configuration.

SIP Announcements to Audio Endpoints & Gateways

Registered SIP IP audio endpoint and gateway entities are ready to receive service. Users of SIP IP Phones and SIP IP Microphones simply dial the associated endpoint or gateway extension number. Once connected, the user makes their tannoy, pa, paging announcement and hangs up when completed.

Mixed Technology SIP

Mixed SIP IP & traditional audio technologies can provide a cost effective proposition for both existing audio system installations and new audio installations.

For example, utilising SIP and network infrastructure for audio distribution, IP audio decoder/s devices are used to connect to traditional audio system equipment and speakers. This enabling capability is particularly effective where concentrations of speakers  are required in one area or audio zone. 

This design topology has become a cost effective poplar option for large scale commercial audio installations (large site, industrial, campus etc..).

Client Study - Project Example

Our customer is a leading UK distributor of innovative consumer garden products, solar lighting and electronics. Opening an extensive new build warehouse, showroom and offices, they required a complete site tannoy, pa, paging solution. Our mixed technology design solution combined traditional audio amplification into standard 100v line speakers. However, audio inputs and distribution throughout the site was made via IP audio and specifically through a small number of SIP gateway entities to enable zone based tannoy, pa & paging announcements.

SIP IP Audio

Need help? Want more details?
Need to discuss a new audio system design or project?
Want to learn more about IP audio applications?