{"product_id":"rdlsttc1-telephone-system-coupler-co-line-simulator-7-year-warran","title":"Telephone System Coupler - CO Line Simulator - 7 Year Warranty","description":"\u003ch4\u003eTelephone System Coupler - CO Line Simulator - 7 Year Warranty\u003c\/h4\u003e\u003cp\u003eThe ST-TC1 is intended to be connected to an on-site telephone system switching unit KSU. It is NOT intended to be connected directly to a telephone CO line. Connections from the ST-TC1 go into the telephone switching unit as if the ST-TC1 was an incoming phone line.\u003cbr\u003e\u003cbr\u003eWhen the KSU seizes the line to the ST-TC1 a relay contact closure is provided which can be used to control a variety of equipment such as a paging system or radio system. The closure is maintained as long as the line is seized. A 600 Ω transformer-isolated audio feed is available for audio input to or output from the telephone switching unit. The ST-TC1 will pass DTMF audio from a telephone keypad or other DTMF generating device.\u003cbr\u003e\u003cbr\u003eThe ST-TC1 may be utilized to add paging zones or radio system interface to a telephone system. When any instrument in the telephone system seizes the line associated with the ST-TC1 the relay closes to activate the radio or paging function and the audio spoken into the handset is broadcast. The ST-TC1 can not be connected to a phone line that has ringer voltage present.\u003cbr\u003e\u003cbr\u003eThe ST-TC1 can be used in conjunction with RDL's® ST-VOX1 modules to provide two-way communication. The ST-VOX1 will provide the necessary push-to-talk function to key the two-way communications systems.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e• Simulate a Telco CO Line\u003cbr\u003e• Connect to local telephone switch or instrument\u003cbr\u003e• Add Radio Control or Paging to KSU\u003cbr\u003e• Contact Closure when Line is Off-hook\u003cbr\u003e• Audio Input\/Output from Telephone Switching Unit\u003cbr\u003e• 7 Year Warranty\u003c\/p\u003e\u003ctable class=\"features\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eFeatures\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd class=\"feature\"\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7 Year Warranty  \u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Radio Design Labs","offers":[{"title":"Default Title","offer_id":63661035225418,"sku":"RDLSTTC1","price":167.79,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/6896\/1354\/files\/RDLSTTC1-1.jpg?v=1791028183","url":"https:\/\/crystaltechgroup.myshopify.com\/products\/rdlsttc1-telephone-system-coupler-co-line-simulator-7-year-warran","provider":"Crystal Tech","version":"1.0","type":"link"}