Physical
20.8 cm W x 23.5 cm D x 8.0 cm H (8.2”W
x 9.3”D x 3.2”H)
889g (31.3 oz)
4 positions footstand
Wall mountable
Power
Integrated IEEE 802.3af Power Over
Ethernet (PoE) support
AC wall adapter (sold separately)
Audio
Hearing aid compatible (HAC) handset
Full-duplex quality speakerphone
Display and Indicator
3 line LCD display
LED for call and message waiting
indicator
Feature Keys
1 call appearance
4 navigational keys
9 configurable speed-dial keys using
number keypad
9 predefined hard keys, plus 2 volume
keys:
Goodbye
Services
Hold
Redial
Save
Delete
Swap
Speakerphone
Mute
Protocols / Codecs
IETF SIP (RFC3261) and associated RFC
drafts
G.711 μ-law / A-law
G.729
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
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Security
User and administrator level passwords
Encryption of configuration files
HTTPS configuration download and web
management
Phone lock with PIN
TLS and SRTP*
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
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 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 separately
D0023-0041-01-00 (North American
AC adapter)
D0023-1051-00-75 (Universal AC
adapter)
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Optional midspan Power Over Ethernet
(POE) injector available, but not
provided, for networks that do not
supply power
D0023-0031-00-00 (North Amer ica)
D0023-0031-PS-00 (Universal)
Package Contents
Aastra 51i IP telephone
Handset and coil cord
2x Footstand
Ethernet cable
Quick reference speedial label
Wall Drilling template, screws and
anchors
Installation Guide
Regulatory
CE
ROHS compliant
WEEE (2002/96/EC)
CE Mark (89/336/EEC EMC Directive and
73/23/EEC Low Voltage Directive)
EMC
FCC Part 15 Class B
ICES-003 Class B
AS/NZS 3548 Class B
EN55022 Class B
CISPR22 Class B
EN55024
EN61000-4-2, 4-3, 4-4, 4-5, 4-6, 4-8, 4-11
Safety
CAN/CSA C22.2 No. 60950
EN 60950
UL 60950-1
Telecom
FCC Part 68 (Hearing Aid Compatibility)
* Feature availability dependant on IP telephony systems
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COPYRIGHT (C) 2007 AASTRA TECHNOLOGIES LTD. ALL RIGHTS RESERVED. INFORMATION IN THIS DOCUMENT IS SUBJECT
TO CHANGE WITHOUT NOTICE. AASTRA TELECOM ASSUMES NO RESPONSIBILITY FOR ANY ERRORS THAT MAY APPEAR
IN THIS DOCUMENT. PRODUCT CAPABILITIES DESCRIBED IN THIS DOCUMENT PERTAIN SOLELY TO AASTRA TELECOM’S
MARKETING ACTIVITIES IN THE U.S AND CANADA. AVAILABILITY IN OTHER MARKETS MAY VARY.
AASTRA TELECOM
155 SNOW BLVD.,
CONCORD, ONTARIO, CANADA, L4K 4N9
SALES@AASTRA.COM • WWW.AASTRATELECOM.COM
Rev 07/07
PMS 293CPMS 298C
Aastra 51i Technical Specifications www.aastratelecom.com