Product Detail
Aastra 536M Expansion Module with 36 Programmable Keys, A1736-0000-10-55
Using your Aastra 55i, 57i & 57i-CT with Aastra 536M, call coverage and management is even more easy and efficient to handle. With the expansion module, you add additional programmable keys and LEDs, increasing your total number of keys and LEDs.