Norstar T1 Services Cartridge (NTBB24GA)

The Norstar Service Cartridge (NTBB24GA) uses slot "B" in the core Modular ICS unit. It provides the clocking service that is required for digital networks. It is required if you are using DTI cartridges or ISDN-BRI Interface cartridges.

Cannot be used if a Copper Expansion Upgrade Cartridge is installed.

Compatible only with the Norstar Modular ICS core unit.

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