$152.99 Aastra 536M Sidecar Expansion Module
With the Aastra 536M Expansion Module, your Aastra IP Phone has the best features to meet the requirements of executive and administrative staff that require high call coverage and flexibility from communication systems.
Aastra 536M Sidecar - Programmable Feature Expansion Module - Connexio 5i Series
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.
Aastra 536M Sidecar Features & Functionality
Scalable to 3 expansion modules per phone
Power direct from phone
No external power adapter required
Line, speed-dial, BLF, BLA, SCA, DND
36-keys with LED
Paper strip labeling
Supported on 55i, 57i, 57i CT