{"product_id":"avaya-definity-tn556b-12-port-isdn-bri-4-wire-s-t-circuit-pack-refurbished","title":"Avaya Definity TN556B 12-Port ISDN-BRI 4-Wire S\/T Circuit Pack - Refurbished","description":"\u003cp\u003eThe TN556B is a 12-port ISDN-BRI line circuit pack with a 4-wire S\/T interface for Avaya (Lucent) Definity systems. It connects ISDN-BRI telephones and terminals and matches a TN556B in an existing carrier.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition: Refurbished.\u003c\/strong\u003e Cleaned and fully tested.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTN556B circuit pack\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e Trunk cabling and cross-connect hardware.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e12 ISDN-BRI ports (2B+D each)\u003c\/li\u003e\n\u003cli\u003e4-wire S\/T interface on the network (NT) side\u003c\/li\u003e\n\u003cli\u003eConnects ISDN-BRI telephones and terminals, such as 8500-series sets\u003c\/li\u003e\n\u003cli\u003ePorts can also terminate ASAI links to adjunct applications\u003c\/li\u003e\n\u003cli\u003eSingle-slot TN circuit pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart number\u003c\/th\u003e\n\u003ctd\u003eTN556B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePorts\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eISDN-BRI, 4-wire S\/T (NT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCompatible systems\u003c\/th\u003e\n\u003ctd\u003eAvaya Definity TN port carriers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAvaya (Lucent) Definity systems with TN-style port carriers\u003c\/li\u003e\n\u003cli\u003eISDN-BRI voice terminals and data equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBefore you buy\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMatch the suffix on your existing board; later systems typically specify the TN556D.\u003c\/li\u003e\n\u003cli\u003eBRI trunks to a carrier use a different board (TN2185-series); this card serves the line (terminal) side.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePart numbers\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTN556D: Later vintage\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e This item comes with a 1-year warranty from Enterprise Resale Solutions.\u003c\/p\u003e","brand":"Avaya","offers":[{"title":"Default Title","offer_id":67816800092330,"sku":"DS-TN556B-REF","price":73.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1287\/5695\/files\/2_30fbcde1-3e14-480f-bd8f-22d8f4c93a1d.jpg?v=1793816081","url":"https:\/\/www.enterpriseresale.com\/products\/avaya-definity-tn556b-12-port-isdn-bri-4-wire-s-t-circuit-pack-refurbished","provider":"Enterprise Resale","version":"1.0","type":"link"}