Nortel Meridian M522 22-Btn Expansion Module, Ash (NT4X43AA) Refurbished

The Nortel Meridian M522 NT4X43AA expansion module that provides 22 programmable buttons that can be configured for line access or programmable features. The expansion module provides LCD indicators that alert users to the status of programmed lines or features in use. The Nortel Meridian M522 module is compatible with the Meridian M5216 and M5316 phones.