Nortel Modular ICS Key Service Unit with 8 incoming lines and 32 telephone station ports. Expandable phone system. A Norstar Modular ICS system MICS provides increased processing power, networking capability and advanced features that can be customized any of your communications needs. The Modular ICS has the ability to integrate high value applications into the phone system as business needs arise: advanced Voice Mail, Call Center Applications, integrated Mobility, Internet Access, ISDN and Desktop CTI connection. Phone System Comes with: