Nortel Norstar Modular 824 KSU. Provides 8 incoming lines and 24 telephone station ports. Requires DR software cartridge. All telephones are interchangeable with Compact ICS (CICS)and Modular ICS (MICS) Telephone Systems. Comes with DR1, DR2, DR3, DR4 or DR5 software.

Nortel Norstar Modular 824 "DS" KSU w/DR5 Software (NT8B20) system supports up to 8 lines and 24 extensions.  Expandable up to 128 total ports when expansion modules are added.  DS Unit (With disconnect supervision).  Includes ROM & RAM.  Not Equipped with Caller I.D.

Features:

• Nortel Norstar NT8B20 8x24 system supports up to 8 lines and 24 extensions
• Expandable up to 128 total ports when expansion modules are added.
• DS Unit (With disconnect supervision)
• Includes ROM & RAM
• All Fast Rads, ATA`s, VMI, CTA`s and NRU`s are compatible with 8x24 DR5 software.
• Norstar Applications Module (NAM), Startalk Flash, Startalk A, B, C and MINI Voice mails are compatible.
• Compatible with all Norstar phones except the M7100, M7324 and T7406.