Highlights

• For business or home office use

• Full-featured 4-line business-class IP phone supporting Power over Ethernet (PoE)

• Monochrome backlit display for ease of use, aesthetics, and on-screen applications

• Connects directly to an Internet telephone service provider or to an IP private branch exchange (PBX)

• Dual switched Ethernet ports for connecting a computer behind the phone, reducing cabling costs

• Wideband audio for unsurpassed voice clarity and enhanced speaker quality

• Easy installation and highly secure remote provisioning, as well as menu-based and web-based configuration

• Supports up to two Cisco^® SPA 500S Expansion Module, adding up to 64 additional buttons*

• Supports both Session Initiation Protocol (SIP) and Smart Phone Control Protocol (SPCP) with the Cisco Unified Communications 500 Series for Small Business

Comprehensive Interoperability and SIP-Based Feature Set

Carrier-Grade Security, Provisioning, and Management

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

• Highly secure call encrypted voice communications support

• 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

Hardware Features

• Pixel-based display: 128 x 64 monochrome LCD graphical display with backlight

• Dedicated illuminated buttons for:

– Audio mute on/off

– Headset on/off

– Speakerphone on/off

• 4-way rocking directional knob for menu navigation

• Voicemail message waiting indicator (VMWI) light

• Voicemail message retrieval button

• Dedicated hold button

• Settings button for access to feature, setup, and configuration menus

• Volume control rocking up/down knob controls handset, headset, speaker, ringer

• Standard 12-button dialing pad

• High-quality handset and cradle

• Built-in high-quality microphone and speaker

• Headset jack: 2.5 mm

• LED test function

• Two Ethernet ports with integrated Ethernet switch: 10/100BASE-T RJ-45

• 802.3af-compliant PoE

• Optional 5 VDC universal (100-240V) switching; power supply is ordered separately (Cisco PA100)

Regulatory Compliance

• FCC (Part 15, Class B), CE Mark, A-Tick, C-Tick, Telepermit, UL, CB

• Security Features

• Password-protected system, preset to factory default

• 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

• SIP over Transport Layer Security (TLS)

• Secure Real-Time Transport Protocol (SRTP)

Documentation

• Quick-Start Installation and Configuration Guide

• User Guide

• Administration Guide

• Provisioning Guide (for service providers only)

Package Contents

• Cisco SPA 504G 4-Line IP phone, handset, and stand

• Handset cord

• RJ-45 Ethernet cable

• Quick-Start Guide

• CD

Specifications

Table 1. Specifications for the Cisco SPA 504G 4-Line IP Phone

Table 2. Cisco SPA 500 Series IP Phone Comparison