XBlue 47-9101 X-44 4-Line VoIP Phone and Device Replaces Basic Multi-Line Telephones with the X-44 Next Generation (4) Line VoIP Telephone Provides Complete Small Business Telephone System Features including Voice Mail System and Auto Attendant System Capacity of (4) VoIP Telephone Lines and (16) X-44 VoIP Telephones Uses Low Cost Premium VoIP Telephone Lines from XBLUE (or other Certied VoIP Telephone Line Providers) Optional X-44 Wi-Fi Adapter Provides Completely Wireless X-44 Telephone Installation and Operation