Aastra Telecom Dialog 4000 - Manual (Page 3)

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