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A maximum of two BIOU1A cards can be installed on a CTX670 or CTX100 phone system
twenty-four extensions
The ESI 5000-0356 features four programmable buttons
and console settings
ESI IP 55 10/100 Business Phone (5000-0737) Condition:Refurbished A maximum of two BIOU1AESI IP 55 10 100 Phone Description: The ESI 55 10 100 is a VoIP phone designed for the ESI IP 900 and Communication Servers. The ESI 55 5000 0737 features thirty programmable buttons, a voicemail button, full duplex speakerphone, integrated headset jack, and a three lined backlit display. The ESI 55 series is the next generation upgraded from the DFP and IPFP series. ESI 5000 0737 Features: Network: VoIP Fast Ethernet 10 100 Mbps Power over Ethernet
