The Aastra 55i hosts a full-duplex speakerphone along with a graphical LCD screen. There is no need to purchase a separate adapter for power over Ethernet (PoE) as a PoE adapter is included with the phone. Aastra 55i IP Phone with Full-Duplex Speakerphone, Graphical LCD Screen & Up to 9 Lines Supported - Connexio 5i Series The Aastra 55i IP Phone has 6 soft keys which are programmable up to 20 functions. For ones that love hands free phones there is a built-in amplifier along with headset support. The Aastra 55i is expandable up to 3 modules of model 536M. 

The Aastra 55i offers powerful features and flexibility in a standards based, carrier-grade basic level IP telephone. With a sleek and elegant design and 3 line LCD display, the 55i is fully interoperable with leading IP Telephony platforms, offering advanced XML capability to access custom applications and support for up to 9 calls simultaneously. Part of the Aastra 5i Series of IP telephones, the 55i is ideally suited for light to regular telephone requirements.

Aastra 55i Features

 
• XML Browser
      The Aastra 55i 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 Aastra 55i to meet your specific business needs or  vertical applications using the display and keypad.
      
     
• Enhanced Call Management
      With extensive storage  capacity for personal directories, callers logs and redial lists, the  Aastra 55i 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, call waiting, intercom  and local 3-way conference 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  Power-over-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.

Aastra 55i Highlights

 
• Up to 9 call appearance lines 
• Shared call and bridged line appearances 
• Multi-proxy support 
• Distinctive ringing, priority alerting 
• XML browser 
• Personal directory 
• Call forward/Call transfer/Call waiting 
• Caller and calling line information 
• Callers log 
• Local 3-way conference 
• Intercom with auto-answer 
• Redial list 
• Do Not Disturb 
• Live dial pad or pre-dial support 
• Digium™s Asterisk Business Editio  supports Busy Lamp Field (BLF), Bridged Line Appearances (BLA), Intercom 
• BroadSoft™s BroadWorks enhanced SIP supports Shared Call Appearances, Busy Lamp Field (BLF), CommPilot Call Manager 
• Nortel™s MCS 5100/5200 SIP supports Conferencing, Voicemail, and NAT Traversal 
• Sylantro™s SIP  supports Bridged Line Appearances (BLA), Comierge, Call Park/Pickup, Conference

* Feature availability dependant on IP telephony systems

Aastra 55i Technical Specifications:

Aastra 55i Physical

 
• 20.8 cm W x 23.5 cm D x 8.0 cm H (8.2âW x 9.3D x 3.2H) 
• 895 g (31.3 oz) 
• 4 positions footstand 
• Wall mountable

Aastra 55i Power

 
• AC wall adapter included 
• Integrated IEEE 802.3af Power Over Ethernet (PoE) support

Aastra 55i Audio

 
• Hearing aid compatible (HAC) handset 
• Full-duplex quality speakerphone 
• Modular headset connector with built-in amplifier (Non-amplified business headsets are recommended)

Aastra 55i Display and Indicator

 
• 144x75 pixels graphical LCD display 
     
  • Soft white backlight for user comfort in any lighting environment   
  • Configurable for Always On, Always Off, or Auto (power saving) 
   
• LED for call and message waiting indicator

Aastra 55i Feature Keys

 
• 4 call appearance lines with LEDs 
• 4 navigational keys 
• 6 customizable softkeys with LEDs, programmable up to 20 functions 
• 6 programmable keys with LEDs 
• 8 predefined hard keys: 
     
  • Goodbye   
  • Options   
  • Hold   
  • Redial   
  • Speakerphone/Headset toggle   
  • Mute   
  • 2 volume keys 

Aastra 55i Protocols / Codecs

 
• IETF SIP (RFC3261 and associated RFCs) 
• G.711 -law / A-law 
• G.729

Aastra 55i Localization

 
• Multi-lingual support English, French, Spanish, Italian, German 
• Downloadable language pack support for customization and additional language translations 
• Country-specific call progress tones and cadences

Aastra 55i Security

 
• User and administrator level passwords 
• Encryption of configuration files 
• HTTPS configuration download and web management 
• Phone lock w/ PIN

Aastra 55i Networking

 
• Dual 10/100 Mbps switched Ethernet ports 
• Manual or Dynamic Host Configuration Protocol (DHCP) IP address setup 
• Time and date synchronization using SNTP 
• Quality of Service (QOS) support -IEEE 802.1 p/Q VLAN and priority tagging, Type of Services (TOS), and Differentiated Services Code Point 
• Network Address Translation (NAT) support 
• Integrated HTTP/HTTPS server for Integrated HTTP/HTTPS server for including a built-in troubleshooting section 
• Mass deployment via central Mass deployment via central TFTP, FTP, HTTP, HTTPS 
• Redundant server support 
     
  • DNS-SRV   
  • Local backup registrar and/or proxy server 

Aastra 55i Interoperability

 
• Visit www.aastratelecom.com/IPphones for an up to date listing of approved vendor/interoperability

Aastra 55i Part Numbers

 
• A1753-0131-10-05 North America (120V power adapter) 
• A1753-0131-10-55 International (Universal power adapter)

Aastra 55i Package Contents

 
• Aastra 55i IP telephone 
• Handset and coil cord 
• 2x Footstand 
• AC wall adapter 
• Network cable 
• Programmable keys label 
• Installation Guide 
• Wall mount kit