Features
Up to four lines with independent configuration and registration
Active line indication, with name and number
Menu-driven user interface, with support for multiple languages
Digits dialed with number auto-completion
Shared line appearance**
Full-duplex speakerphone
Call hold
Music on hold**
Call waiting
Caller ID name and number
Outbound caller ID blocking
Call transfer - attended and blind
Call conferencing
Automatic redial
On-hook dialing
Call pickup - selective and group**
Call park and retrieval**
Call swap
Call back on busy
Call blocking - anonymous and selective
Call forwarding - unconditional, no answer, or busy
Hot line and warm line automatic calling
Call logs (60 entries each) - calls made, answered, and missed
Redial from call logs
Personal directory with auto-dial (100 entries)
Do not disturb (callers hear busy signal)
Uniform Resource Identifier (URI) (IP) dialing support (vanity numbers)
On-hook default audio configuration (speakerphone and headset)
Multiple ring tones with selectable ring tone per line
Called number with directory name matching
Call number using name - directory matching or via caller ID
Subsequent incoming calls with calling name and number
Date and time with intelligent daylight savings support
Call duration and start time stored in call logs
Call timer
Name and identity (text) displayed at startup
Distinctive ringing based on calling and called number
Speed dialing
Configurable dial/numbering plan support (per line)
Intercom** and group paging**
DNS SRV and multiple A records for proxy lookup and proxy redundancy
Syslog and debug server records (configurable per line)
Report generation and event logging
Statistics transmitted in BYE message
Secure call encrypted voice communication support - SIP over Transport
Layer Security (TLS), and Secure Real-Time Transport Protocol (SRTP)
Built-in web server for administration and configuration with multiple security levels
Automated provisioning, multiple methods - up to 256 bit encryption (HTTP, HTTPS, Trivial File Transfer Protocol [TFTP])
Asynchronous notification of upgrade availability via NOTIFY
Nonintrusive, in-service upgrades
Optionally require administrator password to reset unit to factory defaults
** Feature requires support by SIP server