The Nortel 6 Port Fiber Combo Card provides 6 fiber expansion ports, connects additional Fiber Trunk, Fiber Station, or Analog Station Modules to expand the core MICS cabinet, provides the clocking service required to support T1 or ISDN-PRI on the DTI cartridge or an ISDN-BRI cartridge and fits into slot 1 and 2 of the the MICS cabinet. Additional Details ------------------------------ Product description: The Nortel 6 Port Fiber Combo Card provides 6 fiber expansion ports, connects additional Fiber Trunk, Fiber Station, or Analog Station Modules to expand the core MICS cabinet, provides the clocking service required to support T1 or ISDN-PRI on the DTI cartridge or an ISDN-BRI cartridge and fits into slot 1 and 2 of the the MICS cabinet.