Aastra 536M Expansion Module

Designed to increase the power and flexibility of the 5i Series SIP telephones. Shares power and signaling with the phone, eliminating the need for additional wiring. Designed for receptionists, administrative assistants, call center agents, power users, and executives who need to monitor and manage a large volume of calls on a regular basis. Equipped with LED status indicators and supports a variety of programmable features including Line, Speed Dial, Busy Lamp Field, Bridged Line Appearance, Shared Call Appearance and Do Not Disturb. Simplified Deployment Sharing both power and signaling with the 5i Series phone, the 536M can be easily added without additional installation or wiring expense. Simplified configuration via WebUI or configuration file from the phone.

Compatible with: 55i, 57i or 57i CT telephone, offering up to 108 additional keys.