 | 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 |
