Cisco SPA504G 4-Line IP Phone SPA504G

Cisco SPA504G 4-Line IP Phone

£78.00 (inc VAT) £65.00 (exc VAT)
  • Product Description

    View the refurbished Cisco SPA504G 4-Line IP Phone data sheet here

    • 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® SPA500S 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

    Part of the Cisco Small Business Pro Series, the SIP-based Cisco SPA504G 4-Line IP Phone (Figure 1) has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leaders, enabling service providers to quickly roll out competitive, feature-rich services to their customers.
    With hundreds of features and configurable service parameters, the Cisco SPA504G addresses the requirements of traditional business users while building on the advantages of IP telephony. Features such as easy station moves and shared line appearances (across local and geographically dispersed locations) are just some of the many advantages of the SPA504G.
    The Cisco SPA504G 4-Line IP phone also supports productivity-enhancing features such as VoiceView Express and Cisco XML applications when used with the Cisco Unified Communications 500 Series in SPCP mode.

    Carrier-Grade Security, Provisioning, and Management

    The Cisco SPA504G uses standard encryption protocols to perform highly secure remote provisioning and unobtrusive in-service software upgrades. Remote provisioning tools include detailed performance measurement and troubleshooting features, enabling network providers to deliver high-quality support to their subscribers. Remote provisioning also saves service providers the time and expense of managing, preloading, and reconfiguring customer premises equipment.


    Data networking

    • MAC address (IEEE 802.3)
    • IPv4 (RFC 791)
    • Address Resolution Protocol (ARP)
    • DNS: A record (RFC 1706), SRV record (RFC 2782)
    • Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
    • Internet Control Message Protocol (ICMP) (RFC 792)
    • TCP (RFC793)
    • User Datagram Protocol (UDP) (RFC 768)
    • Real-Time Transport Protocol (RTP) (RFC 1889, 1890)
    • Real-Time Control Protocol (RTCP) (RFC 1889)
    • Differentiated Services (DiffServ) (RFC 2475)
    • Type of service (ToS) (RFC 791, 1349)
    • VLAN tagging 802.1p/Q: Layer 2 quality of service (QoS)
    • Simple Network Time Protocol (SNTP) (RFC 2030)

    Voice gateway

    • SIP version 2 (RFC 3261, 3262, 3263, 3264)
    • SPCP with the Cisco Unified Communications 500 Series
    • SIP proxy redundancy: dynamic via DNS SRV, A records
    • Reregistration with primary SIP proxy server
    • SIP support in NAT networks (including STUN)
    • SIPFrag (RFC 3420)
    • Secure (encrypted) calling via SRTP
    • Codec name assignment
    • Voice algorithms:
    • G.711 (A-law and μ-law)
    • G.726 (16/24/32/40 kbps)
    • G.729 A
    • G.722
    • Dynamic payload support
    • Adjustable audio frames per packet
    • Dual-tone multifrequency (DTMF), in-band and out-of-band (RFC 2833) (SIP INFO)
    • Flexible dial plan support with interdigit timers
    • IP address/URI dialing support
    • Call progress tone generation
    • Jitter buffer: adaptive
    • Frame loss concealment
    • Comfort Noise Generation (CNG)
    • Voice activity detection (VAD) with silence suppression
    • Attenuation/gain adjustments
    • Message waiting indicator (MWI) tones
    • Caller ID support (name and number)
    • Third-party call control (RFC 3725)

    Provisioning, administration, and maintenance

    • Integrated web server provides web-based administration and configuration
    • Telephone keypad configuration via display menu/navigation
    • Automated provisioning and upgrade via HTTPS, HTTP, TFTP
    • Asynchronous notification of upgrade availability via NOTIFY
    • Nonintrusive in-service upgrades
    • Report generation and event logging
    • Statistics transmitted in BYE message
    • Syslog and debug server records: configurable per line

    Power supply

    • Power supply is optional and is purchased separately
    • Models: Cisco PA100-NA, PA100-EU, PA100-UK, PA100-AU
    • DC output voltage: +5 VDC at 2.0A maximum
    • Switching power adapter: 100-240V 50-60 Hz AC input

    Physical interfaces

    • Two 10/100BASE-T RJ-45 Ethernet ports (IEEE 802.3)
    • Handset: RJ-9 connector
    • Built-in speakerphone and microphone
    • Headset 2.5-mm port

    Indicator lights/LEDs

    • Speakerphone on/off button with LED
    • Headset on/off button with LED
    • Mute button with LED
    • Message waiting LED

    Body dimensions (W x H x D)

    8.42 x 8.35. x 1.73 in. (214 x 212 x 44 mm)

    Unit weight

    2.00 lb ( 0.9kg)

    Operating temperature

    32º ~ 104ºF (0º ~ 40ºC)

    Storage temperature

    -4º ~ 158ºF (-20º ~ 70ºC)

    Operating humidity

    5% to 95% noncondensing

    Storage humidity

    5% to 95% noncondensing

  • Product Reviews


    Write A Review

    1. Good Quality Phone

      The Cisco IP Phone 7941 is a nice and easy item to use. Functionality is excellent. Having already got an office with these in it was essential to us to keep everything the same.
      We couldn't be happier with the service we received either, helpful and friendly staff made the entire process smooth and uneventful.
      on 6th Oct 2016

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  • Warranty Information

    All hardware is covered by our 3 Year Intelligent Servers Warranty Program. We serial number track ever single piece of hardware and sub-level component. If you have any failures or problems with what you've ordered please call 0800 612 8711 and request our RMA department who will handle any issues and arrange a replacement if the piece of hardware or component is still within the 3 year warranty period from the date the original order shipped.

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