Cisco MPP CP6851MPP (Multiplatform) VoIP SIP telephone,

CP6851MPP (Multiplatform) VoIP SIP telephone, 2 x Gigabit Ethernet, 4 x line keys, PoE required, AC optional, 3.5 inch backlit LCD, HD audio, RJ9 headset jack, support for up to 1 x expansion module (sidecar / attendant console), SKU # CP-68KEM-3PCC. Optional AC power supply, SKU #CP-6800-PWR-NA. Note: Not for use with Cisco Unified Communications Manager.