background image

Upgradeable

With third-generation hardware, we are introducing a new IP 
platform that is preconfigured for further implementation of 
advanced functions and features, following the natural evolution 
of IP telephony.
•  Support for firmware downloads from web servers  

– enabling new functionality with future telephony system 
software releases – making the telephone future-proof 

•  Support for all major voice compression codecs for bandwidth 

savings 

Dialog 4420 IP Basic

 is positioned as an entry-level IP telephone, 

primarily intended for use in non-communications-intensive 
areas such as office reception areas, general meeting/service 
areas, manufacturing and retail shop floors.

Dialog 4422 IP Office

 is a mid-range IP telephone, offering 

the functionality needed for users working in high-efficiency 
business environments. It is also well-suited as a convenience 
phone in public/service areas.

Dialog 4425 IP Vision

 is a high-end IP telephone with advanced 

features, including multiple line handling and graphical display 
built to handle all user needs. It can also be used in small 
conference rooms.

Up-to-Date

•  SIP can be used with the MX-ONE™ Telephony Server. Features 

(such as callback and conference calls) are initiated in the same 
way as with analog telephones (suffix dialing).

•  Media encrypted with SRTP (Secure Real-Time Transport 

Protocol) and signaling with TLS (Transport Layer Security)

•  Security authentication with RADIUS servers using EAP 

(Extension Authentication Protocol), IEEE 802.1x.

•  PoE (Power over Ethernet), IEEE 802.3af, Power Class 1, which 

means less than 4W required. This enables centralized power 
supply with the associated capability for power supply back-
up.

•  Compliant with the EU directive for RoHS (Restriction of 

Hazardous Substances).

Product features  

Aastra Dialog IP telephones

4420 IP Basic

4422 IP Office  

version 2

4425 IP Vision  

version 2

Dimensions (HxWxL)

92x159x230 mm

92x159x230 mm

102x240x234 mm

Function keys with LEDs

12

13

23

Programmable keys

7

7

17

Support for extra key panel with 17 keys

1

Call list

User mobility: Logon and calls

Hands-free speaker, full duplex/AEC

Headset port and key

Programmable ringtones

Option unit with support for extra bell or busy signals

Call list

Contacts (up to 1000)

Graphic display, LCD

128x25 pixel

320x80 pixel

Adjustable viewing angle

Adjustable contrast

Backlit display

Internet browser

Corporate directory

Dialog 4420 IP Basic

Reviews: