Aastra Telecom Dialog 4000 User Manual

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.

•  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).

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

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1

Call list

User mobility: Logon and calls

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Hands-free speaker, full duplex/AEC

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Headset port and key

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Programmable ringtones

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Option unit with support for extra bell or busy signals

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Call list

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Contacts (up to 1000)

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Graphic display, LCD

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128x25 pixel

320x80 pixel

Adjustable viewing angle

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Adjustable contrast

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Backlit display

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Internet browser

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Corporate directory

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Dialog 4420 IP Basic