Nortel Modular ICS 7.1 Software and NVRAM Cartridge NTPW0138, NTBB08 (Refurbished)Norstar Modular ICS 7. 1 software. All norstar phones (M7000 Series, T7000 Series, Norstar Cordless Phones) are compatible with Modular ICS 7. 1 software. More Information Mnfr. Part #: NTPW0138, NTBB08 Enhanced ATA2 is the ONLY ATA compatible with MICS 6. 1 and later software. All NRU's, Fast RAD, VMI and CTA's are compatible with MICS 6. 1 and later software. SMDR6 is compatible with MICS 6. 1 and later software. The MCDN networking key code is