Products Customer Service Support What's New How to Buy About Us Job Opportunities Clearance Items ©2008 Cortelco, Inc. Home > Products > 2757 VoIP Telephone 2757 VoIP Telephone Model: 275700VIPPAK The feature rich 2757 has undergone extensive 3rd party interoperability testing at tekVizion LABS™ and was recently issued an official statement of certification as "SIP Verified to Cisco Unified Call Manager 5.0". Please view this certification by clicking here. Downloads 2757 Product Brochure 2757 Manual 2757 Quick Guide Features: Wan Port: 1 x RF45 10/100 Base-T Ethernet, Line Auto-Sensing/Switching PC Port: 1 x RJ45 10/100 Base-T Ethernet, Line Auto-Sensing/Switching LCD: Dot Matrix (2.75 in. x 1.5 in.) 4 Soft-Buttons Plus Navigation Button Supports G.723.1, G729A/B, G.711 Voice Codecs Compiles with RFC-3261, SIP Standard Multi-Protocol Support: TFTP, RTP, SNTP, HTTP, SIP, DHCP, PPPoE, and Telnet Dynamic IP Support (DHCP and PPPoE) Remote Software Upgrade Capability (via FTP or TFTP) QoS Support STUN Support Caller ID Web Based Gui Setup Multi-Line (4-Line Appearance Buttons with LED's) Call Transfer 3-way Conference Hold DND Message Waiting Indicator Call History Phonebook 5 One-Touch-Memory Redial Speakerphone Headset Compatible Audible/Visual Ring Signal Adjustable Ring Volume Selectable Ringer Tones Handset Volume Control POE (Power-over-Ethernet) Optional AC Power Adapter Two Position Phone Stand