 | Telephony Features |
 | One voice line |
 | Music on hold* |
 | Call waiting |
 | Outbound caller ID blocking** |
 | Call transfer: attended and blind** ( SIP Only ) |
 | Three-way call conferencing with local mixing |
 | Multiparty conferencing via external conference bridge |
 | Automatic redial of last calling and last called numbers |
 | Call pickup: selective and group* |
 | Call swap |
 | Call back on busy** |
 | Call blocking: anonymous and selective** |
 | Call forwarding: unconditional, no answer, and on busy** |
 | Hot line and warm line automatic calling |
 | Digits dialed with number auto-completion |
 | Anonymous caller blocking** |
 | Support for Uniform Resource Identifier (URI) (IP) dialing (vanity numbers) |
 | Multiple ring tones with selectable ring tone per line |
 | Call duration and start time stored in call logs in web GUI |
 | Distinctive ringing based on calling and called number |
 | 10 user-downloadable ring tones |
 | Speed dialing, eight entries |
 | Configurable dial/numbering plan support |
 | Intercom* |
 | Group paging |
 | Network Address Translation (NAT) Traversal, including Serial Tunnel (STUN) support |
 | DNS SRV and multiple A records for proxy lookup and proxy redundancy |
 | Syslog, debug, report generation, and event logging |
 | Support for highly secure encrypted voice communications |
 | Built-in web server for administration and configuration, with multiple security levels |
 | Automated remote provisioning, multiple methods; up to 256 bit encryption (HTTP, HTTPS, Trivial File Transfer Protocol [TFTP]) |
 | Option to require administrator password to reset unit to factory defaults |
 | **Feature requires support by call server. |
 | **Feature activated via feature code |
 | Hardware Features |
 | Voicemail message waiting indicator light |
 | Voicemail message retrieval button |
 | Volume control |
 | Redial Button |
 | Flash Button |
 | Standard 12-button dialing pad |
 | High-quality handset |
 | One Ethernet WAN port 10/100BASE-T RJ-45 |
 | 5 VDC universal (100–240V) switching power adaptor included |
 | Security Features |
 | Password-protected system, preset to factory defaults |
 | Password-protected access to administrator and user-level features |
 | HTTPS with factory-installed client certificate |
 | HTTP digest: encrypted authentication via MD5 (RFC 1321) |
 | Up to 256-bit Advanced Encryption Standard (AES) encryption |
 | What’s in the Box |
 | Cisco SPA 301 IP phone, handset |
 | Handset cord |
 | RJ-45 Ethernet cable |
 | Power adapter |
 | Quick installation guide |
 | CD |