Portech VoIP SIP IP Speaker IS-660 PoE Ceiling-Speaker

IS-660 is a IP Ceiling POE Speaker provide a user-friendly control andsimple voice broadcasting. The product  is designed to provide easy use for any office,department store,factory,school to be able to quickly broadcast announcements to their any assigned office or branch orclasses  IS-660 can work P to P ,IP to IP and Compatible with IP-PBX,Traditional PBX,Asterisk  Option: IP Broadcasting System User can broadcast announcements to a group of office or branch or classes.  IBS-5: handle 5 pcs IS serial devices IBS-10: handle 10 pcs IS serial devices IBS-20: handle 20 pcs IS serial devices IBS-40: handle 40 pcs IS serial devices IBS-60: handle 60 pcs IS serial devices IBS-80: handle 80 pcs IS serial devices IBS-200: handle 200 pcs IS serial devices Catalog    User manual    Presentation  Features SIP (RFC 3261) compatible Web-based configuration Web-based firmware upgr