NTBB04GC Norstar Compact ICS Combination Services Card
NTBB04GC Norstar Compact ICS Combination Services Card A0652072

Combination Services Cartridge - Provides clocking for ISDN-BRI circuits and expansion from 16 to 24 stations ports. Required for TCM port expansion. Compatible with Compact ICS only. Replaces 8-Port TCM Expansion Cartridge.