Nortel M522 22 button expansion module

Refurbed Only! The Nortel/Aastra Meridian M522 Meridian Expansion Module NT4X43 is compatible with both the M5216 and M5316. The M522 is a 22-button expansion unit, with associated LCD indicators, providing additional keys for lines or features. Up to two expansions can be used, for a total of 44 extra programmable buttons. Combined with Meridian Digital Centrex, the M522 offers effective mini-console capabilities. Used in conjunction with Direct Station Select (DSS), the attendant can monitor and select a free station with the touch of a button. Busy Lamp Field (BLF) allows the attendant to visually monitor who is available to take a call. Camp-on allows the attendant to transfer a call to a busy station, placing the caller on hold until the station is available. The Nortel/Aastra Meridian M522 Meridian Expansion Module is available in charcoal and platinum. The M522 comes with a full one year warra