Mitel 3000 618.5005 Ports Expansion Module 0x8 (Refurbished)The Mitel 3000 Ports Expansion Module features eight extensions with the availability for two central office line modules (four CO lines). This unit also supports both analog and digital sets. Key Features: Mnfr Part #: 618. 5005, LR5801. 06200 Four port modules may be added per system Allows for eight extensions **Note: Requires expansion backplane mfr. part #: 618. 5004, LR5817. 06200**