Aastra Dialog 4422ip Aastra Dialog 4400 IP Telephones, datasheet - Page 3

Requirements Telephony System Aastra MX-ONE Aastra BusinessPhone* Aastra MD Evolution & EBN *Aastra BusinessPhone only supports Dialog 4422 and Dialog 4425 Minimum Requirements Telephony Server 2.0 or Telephony Switch (TSW) Version 7.0 Version 8.0 c Call Features VoIP Features Emergency call support • DHCP* • Fixed number assignment • RTP, IEFT RCF 3550t • Monitor speaker • Quality of Service, IEEE 802.1p&q and DiffServ • Mute function • VLAN support IEEE 802.1p&q • Volume control • Supported codecs G.711 PLC, G.729a, G.729ab, G.723.1 • Programmable ring tones (max. volume > 72 dBA) 10 H.323 V4 • Speed dialing • Branch office survivability support • Increased volume control for users with impaired hearing • SIP support • Acoustic shock protection: ETS 300 245-2 • Support for encrypted media stream (SRTP) • * Dialog 4420 IP Basic requires DHCP. Fixed IP address is not supported on this model Product Features Aastra Dialog IP Telephones Dimensions (H x W x L) mm Function keys with LEDs Programmable keys Support for extra key panel with 17 keys User mobility: Log on and call Hands-free speaker, full duplex /AEC Headset port and key Programmable ring tones Option unit with support for extra bell or busy signals Call list Contacts (up to 1000) Graphic display, LCD (pixel) Adjustable viewing angle Adjustable contrast Backlit display Internet browser Corporate directory 4420 IP Basic 92 x 159 x 230 12 7 • - 4422 IP Office 92 x 159 x 230 13 7 1 128 x 25 4425 IP Vision 102 x 240 x 234 24 7 Call list 320 x 80