{"product_id":"rdl-st-tc1-stick-on-telephone-system-coupler","title":"RDL ST-TC1 Stick-on Telephone System Coupler","description":"\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.\u003c\/p\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 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.The 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.\u003cul\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cli\u003eSimulate a Telco CO Line\u003c\/li\u003e\n\u003cli\u003eConnect to local telephone switch or instrument\u003c\/li\u003e\n\u003cli\u003eAdd Radio Control or Paging to KSU\u003c\/li\u003e\n\u003cli\u003eContact Closure when Line is Off-hook\u003c\/li\u003e\n\u003cli\u003eAudio Input\/Output from Telephone Switching Unit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":48414492372,"sku":"38103","price":106.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1203\/4576\/products\/48ebdef8c699e2b2c738325e90074453.jpg?v=1502892751","url":"https:\/\/sg-2111.myshopify.com\/products\/rdl-st-tc1-stick-on-telephone-system-coupler","provider":"SG_2111","version":"1.0","type":"link"}