Dialog 4425 IP Vision version 2 | Dialog 4422 IP Office version 2 |
Features
•Easy migration to IP telephony
•Elegant design and superior ergonomics
•Compliance with environmental standards
•Easy operation and maintenance
•User mobility (free seating)
Models
•Dialog 4420 IP Basic
•Dialog 4422 IP Office
•Dialog 4425 IP Vision
Excellent Voice Quality and Telephony Services
•Support for Ericsson
•Speaker for monitoring calls and listening to telephony services (for example, interactive voice systems, news and weather forecasts)
•Equipped with hearing aid support and acoustic shock protection
•Quality of service (QoS): Packet prioritization for speech and signaling according to DiffServ. Layer 2 QoS
Telephony System | Minimum Requirements |
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Ericsson | Telephony Server 2.0 or Telephony Switch |
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Ericsson MD110 | BC12 Service Pack 9 |
Ericsson BusinessPhone* | Version 7.0 |
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Ericsson MD Evolution/EBN | Version 8.0 c |
Ericsson EBG | Version 3.1.6 |
*Ericsson BusinessPhone only supports Dialog 4422 and Dialog 4425.
Call Features |
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| VoIP Features |
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Emergency call support | • |
| DHCP | • |
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Fixed number assignment | • |
| RTP, IETF RCF 3550 | • |
Monitor speaker | • |
| Quality of Service, IEEE 802.1p&q and DiffServ | • |
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Mute function | • |
| VLAN support IEEE 802.1p&q | • |
Volume control | • |
| Support for codecs G.711, G.729a, G.729ab, G.723.1 | • |
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Programmable ringtones (max. volume >72dBA) | 10 |
| H.323 V4 | • |
Speed dialing | • |
| Branch office survivability support | • |
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Increased volume for users with impaired hearing | • |
| SIP support | • |
Acoustic shock protection: ETS 300 | • |
| Support for encrypted media stream (SRTP) | • |
