NEC Electra Elite 192 Key Service Unit (Refurbished) Mitel It can easily expand to

It can easily expand to accommodate up to 6 incoming lines and 24 stations with the addition of two plug-in cards

It also has a built in  2-way speakerphone for conferencing and listen only use

One-button access to call employees and manage contacts

Compatible with Trillium Panther 612 System

NEC Electra Elite 192 Key Service Unit (Refurbished) Mitel It can easily expand toThe Electra Elite Key Service Unit provides 64 ports and can be expanded to a maximum of 192 ports with addition of 2 expansion KSUs. Mfr. Part#: 750010 Cabinet Backup batteries Two RCA jacks for external paging and MOH input Three DB9 serial interfaces Wall mount bracket Refurbished Power Supply NOT Included