Cisco IP Phone 7821 - VoIP phone - SIP, SRTP - 2 lines. The Cisco IP Business Phone 7821 with Multi-Platform Phone Firmware delivers high-fidelity voice communications to improve inter-office communication while helping to lower operating costs. This voice over IP phone is ideal for any mid-sized to large enterprise company that wants to update its phone system from a traditional analog or digital-based system to an IP Communications system.
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Cisco CP-7821-K9 IP Phone 7821 - VoIP phone - SIP, SRTP - 2 lines