Nortel Meridian M3904 Display Phone NTMN34 (Charcoal/Refurbished)The Meridian M3904 telephone set is a multi line digital telephone, 6 self labeled, programmable line feature keys, 5 line, 24 character display. Handsfree with LED, 4 self labeled interactive soft keys provide access to numerous features. Supports two snap in cartridge accessories System Requirements Compatibility: Use with Meridian 1 Release 24 software or higher. Key Features: Mfr. Part #: NTMN34 Supports up to 12 lines; 56 with key module; 36 with