The Nortel Norstar MICS phone system cabinet (NT7B53) - or Modular Integrated Communications System is a good fit for you if you're looking for a reliable, feature-rich business phone system that is expandable. The MICS supports up to 24 incoming lines and up to 274 extensions.
This Modular Integrated Communications System MICS is the most comprehensive of the Norstar product offerings. The Norstar Modular Integrated Communications System (ICS) is a key Norstar telephone system designed for growing small-to-medium businesses and is expandable up to 272 ports. Basic configuration is 0x32 (Zero lines x 32 extensions) Modular ICS Core Unit includes 2 universal slots for use with analog and digital line/trunk cartridges. All norstar phones (M7000 Series, T7000 Series, Norstar Cordless Phones) are compatible with Modular ICS 7.1 software. The MICS can grow with your business through the addition of trunk and station modules as you need them.
The Norstar MICS is produced by Nortel, one of the world's leading telecommunications manufacturers. Well built and reliable, the ICS line of business phone systems have a tested mean time between failure (MTBF) rate of approximately 100 years.
Nortel's Integrated Communications Systems are designed to accommodate your changing business requirements as well as new technological developments. Some of the ways they accomplish this are through: