Cisco 7841 IP Phone - Cable - Wall Mountable - 4 x Total Line - VoIP - Caller ID - SpeakerphoneEnhanced User Connect License, Unified Communications Manager - 2 x Network (RJ-45) - PoE Ports - Color - SIP, LDAP, DHCP, SNTP, NAT, STUN, UDP, TCP, TLS, CDP Protocol(s):