The Grandstream GSC3506 SIP and Multicast Intercom Speaker delivers reliable one-way audio broadcasting with HD sound quality and advanced paging capabilities. Designed for public address systems, it supports SIP and multicast paging, priority call-waiting, and integrates easily via PoE, USB, and multiple input ports.

• HD speaker with advanced acoustic chamber for clear announcements

• Supports SIP and multicast paging with call-waiting and priority override

• Compatible with Opus and G.722 full/wide-band audio codecs

• Equipped with 2-pin switch input, alarm-in port, volume controls, reset, USB, and network port

• 10/100Mbps Ethernet with PoE/PoE+ support for streamlined installation