Norstar NTBB24GA MICS Service Cartridge provides the clocking service necessary for digital networks. Required if using DTI cartridge(s) or ISDN-BRI Interface cartridge(s). One services cartridge supports all clocking required, regardless of the number or mixture of DTIs and/or ISDN-BRI Interface cartridges Uses Slot 1 of the core ICS and cannot be used if a Copper Expansion Upgrade Cartridge is installed. Compatible with the Modular ICS core only.
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A portion of each purchase will be donated to The Penrickton Center for Blind Children. For more information, visit penrickton.com
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