Nortel 12x0 Fiber Trunk Module (NTBB20FB-93) (Refurbished)This Norstar Fiber Trunk Module is installed in conjunction with a 2 Port or 6 Port Expansion Cartridge and allows the addition of up to three Trunk Cartridges. The Fiber Trunk Module user fiber optic DS 30 cables instead of copper DS 30 cables. For use on the Modular ICS only. More Information: Mnfr. Part #: NTBB20FB 93 **Fiber DS30 is included
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