The M522 Meridian Mate Expansion Module is compatible with both the M5216 and M5316.
Features - 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 miniconsole capabilities.
- Colors available: Ash, Black, Gray
