Cisco SPA301-G2 1-Line IP Phone

Basic 1-line business-class IP phone
Connects directly to an Internet telephone service provider or to an IP private branch exchange (PBX)
Easy installation and secure remote provisioning, as well as web-based configuration
Supports both Session Initiation Protocol (SIP) and Smart Phone Control Protocol (SPCP) with the Cisco® Unified Communications 500 Series
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