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To add trunk interfaces to the core Modular ICS, Fiber Trunk Modules may be connected to the Modular ICS by a fiber cable.
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Each Fiber Trunk Module (TM) holds up to three Trunk Cartridges. The number of additional lines depends on the cartridge being installed There is one emergency transfer port per Trunk Module.
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All analog trunk cartridges are supported in the Fiber Trunk Module. Digital Trunk Interface (DTI) Cartridges and the Services Cartridges are not supported in the Fiber Trunk Module.
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ISDN-BRI Cards are supported only on Trunk Modules 3 and 4 (2-port expansion), or Trunk Modules 7 or 8 (6 or 12-port expansion).It has One Male a 50-pin amphenol connection is used as the interface for co-trunks.
