Aastra is a leading manufacturer of IP phones in Europe. They offer the latest in open-standard telephones, which are inter-operable, easy to upgrade, ease to use and are aesthetically attractive.

• Entry Level – 51i – Features and flexibility in an open-standards based, carrier-grade value IP telephone. With a sleek and elegant design and LCD display the 51i offers advanced XML capability to access custom applications and support for high-quality SIP communications.

• Mid-range – 53i – Powerful features and flexibility in a standards based, carrier-grade business IP telephone. In keeping with the 5x range, the 53i is also an attractive phone which incorporates and 3 line LCD display. Like the 51i, it is fully interoperable with leading IP-telephony platforms, offering advanced XML capability to access custom applications and support for up to 9 simultaneous calls.

• Mid-range – 55i – All of the features of the 53i but in an expandable business IP telephone which incorporates a 144 x 75 pixel backlit LCD display, 6 dynamic context-sensitive soft keys and the ability to cater for 9 simultaneous calls. The 55i is ideally suited for all business telephone requirements and users who require additional one-touch feature keys and XML based interoperability

• Top-end – 57i – As the top of the 5x range, the 57i phone offers all of the features and flexibility that could be hoped for in an expandable business grade IP telephone. A large 144 x 128 pixel graphical backlit LCD display and 6 dynamic context-sensitive soft keys allow for simple and efficient use. In common with the 5x range, the 57i is fully interoperable with leading IP telephony platforms, offering advanced XML capability to access custom applications and can also support for up to 9 calls simultaneously. The 57i is ideally suited for executives and business telephone users who require a number of ‘one touch’ feature keys.

The table compares the features and functionality of each of the Aastra phones:

Aastra	51i	53i	55i	57i
No. of lines	1 line	Up to 9 call appearance lines	Up to 9 call appearance lines	Up to 9 call appearance lines
Sound quality	Full duplex speaker phone	Full duplex speaker phone	Full duplex speaker phone	Full duplex speaker phone
PBX Functionality	Supports all standard PBX functions	Supports all standard PBX functions	Supports all standard PBX functions	Supports all standard PBX functions
Display	3 line LCD. No backlight	3 line LCD. No backlight	144 x 75 Graphical LCD. With white LED backlight	144 x 128 Graphical LCD. With white LED backlight
PoE support	Integrated IEEE 802.3af. Optional PoE Injector	Integrated IEEE 802.3af. Optional PoE Injector	Integrated IEEE 802.3af. Optional PoE Injector	Integrated IEEE 802.3af. Optional PoE Injector
Configuration	Easy to configure and use	Easy to configure and use	Easy to configure and use	Easy to configure and use
Interoperability	Fully interoperable with leading IP-Telephony platforms	Fully interoperable with leading IP-Telephony platforms	Fully interoperable with leading IP-Telephony platforms	Fully interoperable with leading IP-Telephony platforms
Ports	Two 10/100 Switched Ethernet Ports	Two 10/100 Switched Ethernet Ports	Two 10/100 Switched Ethernet Ports	Two 10/100 Switched Ethernet Ports
SIP	Yes	Yes	Yes	Yes
USB Port	No	No	No	No
Encryption	Capable of encryption	Capable of encryption	Capable of encryption	Capable of encryption
Local Conferencing	No	3-way conferencing	3-way conferencing	3-way conferencing
Multi-language	Multi-lingual support	Multi-lingual support	Multi-lingual support	Multi-lingual support
No. of keys	27	32	39	39
Programmable keys	None	None	6 softkeys – up to 20 functions	12 softkeys – up to 20 functions
No. of function LEDs	2	12	19	19
Directory	200	200	200	200
Callers Log	200	200	200	200
Redial last numbers	100	100	100	100
Headset Port	Yes	Yes	Yes	Yes
VLAN capable	Yes	Yes	Yes	Yes
QoS capable	Yes	Yes	Yes	Yes
Expansion Module support	No	536M	536M or 560	536M or 560
Browsing	XML Support	XML Support	XML Support	XML Support

In addition to the key models above, other Aastra IP phones are also available – please call us on 0845 0000 500 for details. Back to top ^