Nortel M3900 Display-Based Expansion Module (NTMN67AA70)

M3900 Display-Based Expansion Module (NTMN67AA70) The M3900 Display-Based Expansion Module is designed exclusively for the M3904 and M3905 Telephone sets. This module attaches to the phone and provides 24 additional programmable feature keys. Features Optional add-on to the M3904 and M3905 Additional programmable feature keys: 24 Three layers of eight programmable feature keys Visual indicator for page Cannot be used with KBA Includes Atlas 1-Year Warranty with Extended Warranty options available! Manufacturer Code NTMN67AA70