OPTIMUS expands the SIP compatibility options of its public address equipment with the IA-10SIP model, a SIP interface to analog audio that allows audio to be transmitted from any SIP device to an analog public address equipment: amplifier, preamplifier, power stage ... The equipment is configured from a web server and is powered by PoE or by a 5 V DC source. It has several audio outputs, one direct to an 8 ohm speaker and 2 W of power, and two to connect the public address equipment, one with AUX level (0 dB) and the other with MIC level (-60 dB). The equipment also provides a signal to activate the priority (open collector activated in connection) and a remote control (relay) activated by DMTF from the SIP equipment. This interface is a family with the IA-20SIP model, which adds to the IA-10SIP features the possibility of connecting a microphone or analog sound source and converting it to SIP. It is a device that allows, therefore, standard intercom or public address functions using the SIP telephony network.