سيسكو تليفون Cisco IP telephone SPA504

Telephony Features • Four voice lines • Four Independent SIP Registrations* • Line status: active line indication, with name and number • Menu-driven user interface • Shared line appearance** • Speakerphone • Call hold • Music on hold** • Call waiting • Caller ID name and number • Outbound caller ID blocking • Call transfer: attended and blind • Three-way call conferencing with local mixing • Multiparty conferencing via external conference bridge • Automatic redial of last calling and last called numbers • On-hook dialing • Call pickup: selective and group** • Call park and unpark** • Call swap • Call back on busy • Call blocking: anonymous and selective • Call forwarding: unconditional, no answer, on busy • Hot line and warm line automatic calling • Call logs (60 entries each): made, answered, and missed calls • Redial from call logs • Personal directory with auto-dial (100 entries) • Do not disturb • Digits dialed with number auto-completion • Anonymous caller blocking • 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 • Ability to call number using name: directory matching or via caller ID • Subsequent incoming calls show calling name and number • Date and time with support for intelligent daylight savings • Call start time stored in call logs • Call timer • Name and identity (text) displayed at startup • 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 Simple Traversal of UDP Through NATs (STUN) support • DNS SRV and multiple A records for proxy lookup and proxy redundancy • Syslog, debug, report generation, and event logging