The Algo 1203 is designed to improve customer service or for emergency and non-emergency alerting. The Algo 1203 is rated for indoor use only and is used to trigger an accessory device such as the Algo 8180G2, 8186, 8188, 8189, 8198 PoE+ High Power, 8196 PoE+ High Power SIP Speaker, 8190, or Algo 8128G2 or 8138 SIP Strobe, or Algo 8301 IP Paging Adapter and SIP Scheduler. The Algo 1203 Call Switch offers a reliable and integrated solution for applications requiring one-touch programmable page announcement or alert notification when used with a primary Algo controller product (not included). A basic understanding of electrical wiring, computer networking, and Voice over IP experience is recommended. See also similar item; Algo 1202 Emergency Call Box.