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Aastra 51i

IP Telephones

PMS 293C

PMS 298C

Your Connection to the World

Key Features and Benefits: 

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  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

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Exceptional  Features  and  Value  in  a  Basic  Level  IP  Telephone

The  Aastra  51i  offers  features  and  flexibility  in  an  open-standards 

based, carrier grade basic level IP telephone.  With a sleek and elegant 

design  and  LCD  display  the  51i  is  fully  interoperable  with  leading  IP 

Telephony platforms, offering advanced XML capability to access custom 

applications and support for high-quality SIP communications.  

Part of the 5i Series of IP telephones, the 51i is ideally suited  for light 

use small and medium business applications such as lobbies, common 

areas or individual user environments where single line high-quality SIP 

communication is required. 

Feature Highlights*

1 call appearance 

Shared call and bridged line 

appearances
Distinctive ringing, priority alerting
XML browser
Personal directory
Call forward, Call transfer, Call 

waiting
Caller and calling line information
Callers log
Intercom reception with auto-

answer
Redial list
Do Not Disturb
Live dial pad support
Supports Busy Lamp Field (BLF) 

monitoring by other end points*
Digium’s Asterisk – Bridged Line 

Appearances (BLA), Intercom

Broadsoft’s BroadWorks Enhanced 

SIP – supports Shared Call 

Appearances, CommPilot Call 

Manager, Call Park/Pickup, Priority 

Alerting

Nortel’s MCS 5100/5200 SIP support 

– Voicemail, and NAT Traversal 

support
 Sylantro’s SIP–B support -  Last 

Call return, Warn line and Hot Line, 

Distinctive ringing, Call Park/Pickup, 

and  Centralized Conferencing 

among others

* Feature availability dependant on IP telephony systems

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Summary of Contents for 51i

Page 1: ...ng and backup Easily created configuration files using any text editor can be used to configure phones individually or centrally Exceptional Features and Value in a Basic Level IP Telephone The Aastra 51i offers features and flexibility in an open standards based carrier grade basic level IP telephone With a sleek and elegant design and LCD display the 51i is fully interoperable with leading IP Te...

Page 2: ... SRV Local backup registrar and or proxy server Interoperability 5xi series common interoperability certifications See latest software release notes for up to date information Part Numbers A1751 0131 10 01 51i Phone with English Text Keypad Includes English Install Guide A1751 0131 10 55 51i Phone with International Symbols Keypad Includes Multi language install Guides Accessories AC adapters sold...

Page 3: ...ng 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 Exceptional Features and Value in an Advanced Featured Expandable IP Telephone The Aastra 55i offers powerful features and flexibility in a standards b...

Page 4: ...vice 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 web administration and maintenance including a built in troubleshooting section Mass deployment via central provisioning of user configuration files TFTP FTP HTTP HTTPS Redundant server support DNS SRV Local b...

Page 5: ...o sensingswitchedEthernetportseliminateadditional 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 Exceptional Features and Value in a Fully Featured Expandable IP Telephone The Aastra 57i offers ...

Page 6: ...ion and maintenance including a built in troubleshooting section Mass deployment via central provisioning of user configuration files TFTP FTP HTTP HTTPS Redundant server support DNS SRV Local backup registrar and or proxy server Protocols Codecs IETF SIP RFC3261 and associated RFCs G 711 μ law A law G 729 Security User and administrator level passwords Encryption of configuration files HTTPS conf...

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