51i

Exceptional Features and Value in a Basic Level IP Telephone

Features

• XML Browser
  The Aastra 51i is equipped with XML browser capabilities allowing access to customized services and applications. Create internal service applications using development guides available from Aastra. This feature provides unlimited potential to customize the 51i to meet your specific business needs or vertical applications using the display keypad.
  
  
• Enhanced Call Management
  With extensive storage capacity for personal directory, callers log, and redial list, the Aastra 51i can improve efficiency by providing more call information with the push of a button. Features such as shared call and bridged line appearances, call forward, call transfer and call waiting increase call flexibility and control.
  
  
• Remarkable Audio
  All Aastra IP telephones offer full-duplex speakerphone with excellent voice clarity and delivery. With years of experience in telecommunications and telephone design, Aastra can ensure superior voice quality on every product we sell.
  
  
• Simplified Deployment
  From initial deployment and configuration to future enhancements and upgrades, the Aastra family of IP telephones are designed to save your business time and money. Dual auto-sensing switched Ethernet ports eliminate additional wiring and simplify installations. Integrated IEEE 802.3af Powerover- Ethernet allows easy deployment with centralized powering and backup. Easily created configuration files, using any text editor, can be used to configure phones individually or centrally.

Current Software Release
	51i SIP, Version 2.3.1, September 2008 , English , ZIP , 1815 KB
	5xi series, 9143i, 9480i and 9480iCT Language Pack, Version 2.3.1, September 2008 , English , ZIP , 81 KB
Encryption Tool
	IP Phone Configuration File Encryption Tool - Microsoft Windows , Version 2.x, July 2008 , English , ZIP , 48 KB
	IP Phone Configuration File Encryption Tool - Linux, Version 2.x, July 2008 , English , ZIP , 9 KB
Previous Software Release
	51i SIP, Version 2.3, July 2008 , English , ZIP , 1814 KB
	51i SIP, May 2008, Version 2.2.1 , English , ZIP , 1819 KB
	51i SIP, March 2008, Version 2.2 , English , ZIP , 1808 KB
	51i SIP, Dec 2007, Version 2.1.2 , English , ZIP , 1,700 KB
	51i SIP, Oct 2007, Version 2.1.1 , English , ZIP , 1,693 KB
	5xi series, 9143i, 9480i and 9480iCT Language Pack, Version 2.3, July 2008 , English , ZIP , 81 KB
	5xi series, 9143i, 9480i and 9480iCT Language Pack, Version 2.2.1, May 2008 , English , ZIP , 79 KB
	5xi series Language Pack , April 2008, Version 2.2 , English , ZIP , 78 KB
	5xi series Language Pack, Dec. 2007, Version 2.1.2 , English , ZIP , 74 KB
	5xi series Language Pack, Version 2.1.1 , English , ZIP , 74 KB
	Software 51i SIP , July 2007, Version 2.1 , English , ZIP , 1,684 KB
	5xi series Language Pack, July 2007, Version 2.1 , ZIP , 49 KB

	51i Datasheet , July 2007 , English , PDF , 147 KB
	NeXspan Terminals , PDF , 753 KB

	Aastra 51i Installation Guide , English , PDF , 4,444 KB
	Aastra 51i Installation Guide , French , PDF , 4,913 KB
	Aastra 51i Installation Guide , Spanish , PDF , 4,729 KB

	51i User Guide , Version 2.1 , English , PDF , 11,211 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone XML Development Guide , Version 2.3.1, September 2008 , English , ZIP , 4438 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone Administrator Guide , Version 2.3, July 2008 , English , PDF , 18169 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone Release Notes , Version 2.3.1 , English , PDF , 1142 KB
Previous User Manuals
	Aastra XML Scripts for trixbox CE , Version 2.0.0 , English , PDF , 2041 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone XML Development Guide , Version 2.3 , English , ZIP , 4458 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone Release Notes, Version 2.3 , English , PDF , 1521 KB
	Aastra Telecom 5xi series SIP IP Phone Administrator Guide , Version 2.1 , English , PDF , 10,912 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone Release Notes , Version 2.2.1 , English , PDF , 900 KB
	5xi series, 9143i, 9480i and 9480iCT SIP IP Phone XML Development Guide , Version 2.2.1 , English , ZIP , 3618 KB
	Aastra Telecom 5xi series SIP IP Phone XML Development Guide , Version 2.2 , English , ZIP , 3371 KB
	Aastra Telecom 5xi series SIP IP Phone XML Development Guide , V2.1.1 , English , ZIP , 2,174 KB
	Aastra Telecom 5xi series SIP IP Phone Release Notes , Version 2.2 , English , PDF , 4481 KB
	Aastra Telecom 5xi series SIP IP Phone Release Notes , Version 2.1.2 , English , PDF , 1,655 KB
	Aastra Telecom 5xi series SIP IP Phone Release Notes , Version 2.1.1 , English , PDF , 1,916 KB
	Aastra Telecom 5xi series SIP IP Phone Release Notes , Release 2.1 , English , PDF , 2,164 KB
	Aastra Telecom 5xi series SIP IP Phone XML Development Guide - July 2007 , Release 2.1 , English , ZIP , 2,141 KB

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