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5
1 Introduction
1.1 Package Contents
Thank you for purchasing the Cortelco 2757 Voice over Internet Protocol (VoIP) phone. The
following items should be packed with the 2757. Please contact your dealer if any of them is
missing.
2757 Phone (Main Body) 1 pcs
Handset 1 pcs
Handset Cable 1 pcs
Network Cable 1 pcs
Desk Stand 1 pcs
1.2 Features
The 2757 is a sophisticated, state-of-the-art VoIP phone system. Instead of using conventional
phone lines, it uses IP data to make and receive calls over the internet. Here are some of the
features of the 2757.
• Multi-protocol support: The 2757 supports multiple network protocols for communication
and management. Among the protocols supported are TFTP, FTP, RTP, SNTP, HTTP,
SIP, DHCP, PPPoE, and Telnet.
• Quality of Service (QoS) Support
• Headset and speakerphone for hands-free operation.
• Standard numeric keypad (0-9, * and #) with built-in DTMF tone generator allowing access
to on-line banking services, voice mail systems, etc.
• Large, clear display
• Ergonomic handset
• Five speed-dial keys
• Configuration via web browser or telnet
• Firmware upgrade via FTP or TFTP
• Built-in Ethernet switch: Allows a computer to be connected through the phone.
• Silence suppression, echo cancellation, and dynamic jitter buffer for better voice quality.
• Caller ID display (where available)
• Supports IEEE 802.3af Power over Ethernet (PoE): When connected to a PoE provider,
the 2757 can be powered via the Ethernet cable and does not require a power adapter.