The Nortel Norstar 4x0 Caller ID Trunk Cartridge provides the same functions as the LS-DS trunk cartridge, but it can also is used to add 4 incoming lines with Caller ID to your Norstar Modular 8X24. Provides access for up to four Central Office analog lines
The Nortel Norstar 4x0 Caller ID is compatible with:
Modular ICS
Fiber and Copper Trunk Modules
Compact ICS
Modular 8x24 Copper Trunk Module
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