There are a number of system requirements to consider when designing SIP to PAVA systems.

Components Required

The SIP module is effectively an ‘app’ running on the VIPEDIA networking card. Therefore, on a VIPEDIA based system, you only need to ensure that you have a network card running V3 onwards software. The VIPEDIA will need to be connected to the SIP switch LAN over a simple IP connection. There’s a fairly simple configuration guide to link virtual ‘extension numbers’ to zones or groups of zone. To the best of our knowledge, the VIPEDIA SIP endpoint will work with all SIP switches.

Adding VIPEDIA-NET Network Cards (V3.0.2.35 or later) to VIPEDIA routers provides a generic SIP1 Interface. This enables announcements into ASL PAVA systems from third party SIP devices such as SIP telephones.

The SIP Interface is configured using the PAVA System Configuration Tool (PAVA SCT) and File Transfer Tool (FTT).

Typical Installations

We are seeing SIP implementation in stations, warehouses and retail public address systems. We are also seeing SIP implementation from radio systems via a telephone switch, which broadens the appeal a lot further. A typical use might be for staff calls in large retail environments, or for security calls via PMR in a plant.



The SIP functionality enables telephone users to make PA calls. This means for staff calls, they can be made from any telephone extension, removing the need for dedicated microphone hardware. The link to radios is potentially even more versatile, with staff being able to make an announcements from any location via hand-held radios. With the ability to program VIPEDIA’s to allow paging in particular zones, it’s a very versatile add-on.


Key Benefits

A key benefit of a SIP to PAVA system can be the speed of the announcement. There’s no time wasted going to a fixed microphone position – this can be invaluable in a security situation, or even when just trying to reduce till queues at a supermarket. The other genuine benefit for clients is they effectively have more microphones for free.


Additional Notes

It’s important to know that although ASL hasn’t tested this SIP connectivity with every SIP switch available on the market (there are simply too many out there), the functionality we use to act as a SIP endpoint is so basic that it doesn’t use any advanced features that might be specific to a particular vendor. As such, we believe it will work with all SIP technology providers.


System Example – Simplified


The full SIP Configuration Guide can be downloaded here: