Nortel Meridian M5009 Phone NT4X35 (Black/Refurbished)The Nortel Meridian M5009 telephone set is compatible with the Meridian Digital Centrex and Meridian SL 100 Integrated Services Networks. The Meridian M5009 telepone set features a unique mercury switch handset provides positive disconnection to transmitter and receiver when on hook. Key Features: Mnfr. Part #: NT4X35 Nine programmable line feature keys Supports Multiple Appearance Directory Numbers (MADNs) Compatible with 36 button add on module for