Telephone characteristics
Supports multiple languages (Chinese, English, Korean, Spanish, Japanese, etc.)
Supports multiple SIP account registrations
Support call holding, call waiting, call forwarding
Call transfer (busy transfer, blind transfer, consultation transfer)
Incoming call display, redial, silent, Do Not Disturb DND
Automatic response, three-party voice conference call
Radio paging
Speed dial, voice message
Information indicator light, volume control
Ringtone selection, import, and deletion (comes with 3)
Support time setting (obtained by SNTP/SIP Server/manual)
Blacklist, call records (Dialed, Received, Missed, transferred)
Supports WEB control and WIFI connection
Advanced functions
Four function soft keys
Four directional navigation keys
Six function keys, headset, voice message, mute, transfer, redial, hands-free, etc
Support XML personal address book search/import/export (1000 items)
Supports the expansion of 320DSS keys to monitor the status of both internal and external lines
PBX compatibility function
BLF/BLA, BLF list, Do Not Disturb & Call forwarding
Intercom, Paging
Dialing rule, call out immediately
Call pickup, call on behalf of others
Wait for the prompt sound and distinguish it from the ring
Anonymous call, anonymous call rejection
Audio parameters
Broadband code: G.722
Narrowband coding: G.711μ/A, G723.1, G726, G.729AB,iLBC
Supports audio processing such as VAD,CNG,AEC,AGC, etc
Full-duplex hands-free with automatic echo cancellation
Network parameters
Supports SIP V1 (RFC2543),V2 (RFC3261)
Support DNS SRV (RFC3263)
Supports STUN internal network penetration, CDP, LLDP, and L2TP
Supports three DTMF modes: In-band, RFC2833, and SIP INFO
Two IP acquisition methods are supported: static IP/DHCP
Built-in DNS/TFTP/FTP clients
Supports NAT/DHCP services
Configuration Management
Supports automatic updates via FTP/TFTP/HTTP/HTTPS
It supports three configuration modes: web page, phone and automatic configuration
Supports TR069 protocol. Currently, it supports remote upgrade and Telnet management
Built-in HTTP Web server user configuration management
Safety features
Supports VLAN (802.1pq), LLDP, and VPN (L2TP)
Support the TLS (Transport Layer Security) protocol
Supports keyboard lock and administrator/user hierarchical mode
Supports the information verification mechanism MD5 and the AES encryption protocol
Support hard encryption with encryption chips (optional)
