sip phone intercom system for apartments

{"cid":"91223989","title":"Wireless Cordless 3 SIP Users Intercom for Apartment Home Call Center 3 Speed Dial Keys 4G Full Bands SIM Card LAN Wifi GSM POE","imgUrl":"https:\/\/img.chinax.com\/nimg\/31\/e9\/43e8b785ca46475d5675ca932e9e-200x200-1.jpg","attrs":{"Brand Name":"OEM\/ODM","Model Number":"S01","Type":"VoIP Phone","Place of Origin":"Guangdong, China","Network":"Wireless Lan, SDK, POE, Ip, 4g, wifi, GSM, bluetooth, 2g\/3g\/4g\/wifi 2.4G Optional","Operating System":"Linux","protocol":"sipv2","Product name":"Sip Voip Phone","VoIP Protocols":"SIP V2 (RFC 3261)","Voice Codec":"G.711A\/U Law and more","Power supply":"DC 5V 1A","Sim slot":"2 SIM Slots","Display":"2.4 inch","Wireless Security":"WEP","Frequency":"TDD-LTE\/FDD-LTE\/3G\/2G","Function":"Hold\/Call Forward\/Auto-provisioning\/Mute\/Date\/DSS Keys SIP\/Sip Call"}}

{"cid":"91210763","title":"Emergency Sip Industrial VoIP Phone Ethernet Switch Industrial Intercom System","imgUrl":"https:\/\/img.chinax.com\/nimg\/f4\/79\/783a107cd89195e4a1a57a71af18-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Yuantong","Minimum Order Quantity":"1","Delivery Time":"15-25 days","Certification":"CE, FCC, RoHs","Place of Origin":"China","Payment Terms":"T\/T","Supply Ability":"1000 pcs per month","Packaging Details":"Carton","Product Name":"Voip Video Industrial Telephone","Vandal Resistant":"Yes","Feature":"Video communication","Installation":"Wall mounting","MOQ":"1 Set","Application":"For Subway Intercom Telephone"}}