The MICS 0X32 Norstar control unit is the latest by Nortel in small to medium size business phone systems. The 0X32 represents 0 lines by 32 stations capable. Lines are added via trunk cards (NT7B75, NT5B41 caller ID or the NT7B74 T-1). This phone system expands modularly through fiber connections and offers all of the latest desired business features. The system will support (2) T-1 digital trunks which allow up to 24 trunk lines each, many medium size companies can save on dial tone by using T-1 services. Either the Norstar Flash voicemail or the Norstar Application Module can be added to any revision of software. Model NT7B53.