CISCO - IP PHONE 7841 - VOIP PHONE (CP-7841-K9). KEY FEATURES : PRODUCT TYPE : VOIP PHONE MAIN FEATURES : MULTIPLE VOIP PROTOCOL SUPPORT, INTEGRATED ETHERNET SWITCH VOIP PROTOCOLS : SIP, SRTP VOICE CODECS : G.722, G.729AB, G.711U, G.711A, ILBC LINES SUPPORTED : 4 LINES SPEAKERPHONE : YES ( DIGITAL DUPLEX ) CALL SERVICES : VOICE MAIL, CALLER ID, CALL WAITING, CALL FORWARDING, CALL TRANSFER, CALL HOLD, MESSAGE WAITING CAPABILITY DISPLAY : LCD DISPLAY - MONOCHROME - YES NETWORK PORTS QTY : 2 X ETHERNET 10BASE-T/100BASE-TX/1000BASE-T COMPATIBLE SOFTWARE : CISCO UNIFIED COMMUNICATIONS MANAGER 8.5.1 OR LATER CONDITION : NEW FACTORY SEALED. AVAILABILITY : IN STOCK. OUR WARRANTY : 30 DAYS.