560M (M675I)
By Aastra Telecom Technologies

The 560M expansion module is designed to increase the power and flexibility of the 5i Series SIP telephones. Up to three modules can be used with the 57i or 57i CT telephone to create a powerful, feature rich console option. The 560M shares power and signaling with the phone, eliminating the need for additional wiring. ... 

536M (M670I)
By Aastra Telecom Technologies

The 536M expansion module is designed to increase the power and flexibility of the 5i Series SIP telephones. Up to three modules can be used with the 57i or 57i CT telephone to create a powerful, feature rich console option. The 536M shares power and signaling with the phone, eliminating the need for additional wiring. ... 

Cisco Unified Ip Color Key Expansion Module Charcoal
By Cisco Systems

Cisco Unified Communications Solutions enable collaboration so that organizations can quickly adapt to market changes while increasing productivity, improving competitive advantage through speed and innovation, and delivering a rich-media experience across any workspace, securely and with optimal quality. ... 

Snom Expansion Module V2.0 320, 360, 370
By Snom

Phone Expansion Module - Product Model: 1268 - Compatibility: - IP Phone - - ... 

Telephone Console
By XBLUE Networks

Phone Expansion Module - Features: DSS - BLF - Compatibility: - IP Phone - - ...