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8 FXS Port Gateway - Cisco SPA8000

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The SPA8000 is a industry respected FXS gateway for VoIP and a good choice for any phone system.  Its a stable and mature gateway with broad support for both hosted and premise based systems.

FXS gateways are used to add consumer grade cordless phones, fax machines and other analog devices like basic phones and alarm systems.  Eight ports allow for 8 devices to be added.

About the Cisco SPA8000 8 FXS Port Gateway

The Cisco SPA8000 8-Port IP Telephony Gateway is a full-featured analog telephone adapter (ATA) for small businesses, providing enhanced communication services via a broadband connection to the Internet.

The Cisco SPA8000 features eight RJ-11 FXS ports to connect analog telephones to IP-based data networks and includes a single multiport RJ-21 50-pin connector, offering an alternative connection choice when deploying the telephony gateway in varied environments. The device also has one 10/100BASE-T RJ-45 Ethernet interface to connect to either a router or a multilayer switch.

Solid in design, the Cisco SPA8000 is an affordable solution that is ideally suited for use in business and consumer voice over IP (VoIP) service offerings, including call centers and multi-dwelling environments. Customers can protect and extend their investment by continuing to use their existing analog telephones and teleconferencing equipment.

Installed by the end user and remotely provisioned, configured, and maintained by the service provider, each Cisco SPA8000 converts voice traffic into data packets for transmission over an IP network and uses common standards for voice and data networking for reliable voice and fax operation.



Specification Sheet


More Specifications



  • Eight voice ports (RJ11) for analog phones or Fax machines
  • Impedance diagnostics - 8 Configurable Settings
  • Call Waiting, Cancel Call Waiting, Call Waiting Caller ID
  • Caller ID with Name/Number (Multi-national Variants)
  • Caller ID Blocking
  • Call Forwarding: No answer, Busy, All
  • Do Not Disturb
  • Call Transfer
  • Three-way Conference Calling with Local Mixing
  • Message Waiting Indication - Visual and Tone Based
  • Call Return
  • Call Back on Busy
  • Call Blocking with Toll Restriction
  • Delayed Disconnect
  • Distinctive Ringing - Calling and Called Number
  • Off-hook Warning Tone
  • Selective/Anonymous Call Rejection
  • Touch Tone Phone Keypad Configuration with Interactive Voice Response (IVR)
  • Fax: G.711 Pass Through or Real Time Fax over IP via T.38**T.38 support is dependent on fax machine and network/transport resilience

    Package Contents

    • 1 - SPA8000 Phone Adapter Unit
    • 1 - 12v Power Adapter
    • 1 - RJ45 Ethernet Cable
    • 1- Quick Installation Guide


      • MAC Address (IEEE 802.3)
      • IPv4 - Internet Protocol v4 (RFC 791) upgradeable to v6 (RFC 1883)
      • ARP - Address Resolution Protocol
      • DNS - A Record (RFC 1706), SRV Record (RFC 2782)
      • DHCP Client - Dynamic Host Configuration Protocol (RFC 2131)
      • DHCP Server - Dynamic Host Configuration Protocol (RFC 2131)
      • PPoE Client - Point to Point Protocol over Ethernet (RFC 2516)
      • ICMP - Internet Control Message Protocol (RFC792)
      • TCP - Transmission Control Protocol (RFC793)
      • UDP - User Datagram Protocol (RFC768)
      • RTP - Real Time Protocol (RFC 1889) (RFC 1890)
      • RTCP - Real Time Control Protocol (RFC 1889)
      • DiffServ (RFC 2475), Type of Service - TOS (RFC 791/1349)
      • VLAN Tagging - 802.1p
      • SNTP - Simple Network Time Protocol (RFC 2030)
      • Upload Data Rate Limiting - Static and Automatic
      • QoS - Voice Packet Prioritization over Other Packet Types
      • MAC Address Cloning
      • Port Forwarding
      • SIP channels support both UDP and TCP transport
      • VPN Pass-Through with IPSec ESP, PPTP, and L2TP

      Voice Gateway

      • SIPv2: Session Initiation Protocol v2 (RFC 3261, 3262, 3263, 3264)
      • SIP Proxy Redundancy - Dynamic via DNS SRV, A Records
      • Re-registration with Primary SIP Proxy Server
      • SIP Support in Network Address Translation Networks - NAT (incl. STUN)
      • Secure (Encrypted) Calling via Pre-Standard Implementation of Secure RTP
      • Codec Name Assignment
        • G.711 (a-law and µ-Law)
        • G.726 (16/24/32/40 kbps)
        • G.729 A
        • G.723.1 (6.3 kbps, 5.3 kbps)
      • Dynamic Payload
      • Adjustable Audio Frames per Packet
      • Fax Tone Detection Pass-Through
      • Fax Pass-Though - Using G.711
      • DTMF: In-band & Out-of-band (RFC 2833) (SIP Info)
      • Flexible Dial Plan Support with Interdigit Timers and IP Dialing
      • Call Progress Tone Generation
      • Jitter Buffer - Adaptive
      • Frame Loss Concealment
      • Full Duplex Audio
      • Echo Cancellation (G.165/G.168)
      • VAD - Voice Activity Detection with Silence Suppression
      • Comfort Noise Generation (CNG)
      • QoS (Ethernet port up-stream bandwidth control, Physical port, MAC address, Application)
      • Attenuation / Gain Adjustments
      • Flash Hook Timer
      • MWI - Message Waiting Indicator Tones
      • VMWI - Visual Message Waiting Indicator via FSK
      • Polarity Control
      • Hook Flash Event Signalling
      • Caller ID Generation (Name & Number) - Bellcore, DTMF, ETSI
      • Music on Hold Client
      • Streaming Audio Server - up to 10 sessions
      • System DDR SDRAM - 16M Bytes
      • System Flash ROM - 4M Bytes


      • Password Protected System Reset to Factory Default
      • Password Protected Admin and User Access Authority
      • Provisioning/Configuration/Authentication:
      • HTTPS with Factory Installed Client Certificate
      • HTTP Digest - Encrypted Authentication via MD5 (RFC 1321)
      • Authentication: EAP-TLS, EAP-TTLS, and EAP-PEAP
      • SIP TLS (Transport Layer Security)
      • Up to 256-bit AES Encryption

      Provisioning, Administration & Maintenance

      • Web Browser Administration & Configuration via Integral Web Server
      • Telephone Key Pad Configuration with Interactive Voice Prompts
      • Automated Provisioning & Upgrade via HTTPS, HTTP, TFTP
      • Asynchronous Notification of Upgrade Availability via NOTIFY
      • Non-intrusive, In-Service Upgrades
      • Report Generation & Event Logging
      • Stats in BYE Message
      • Syslog & Debug Server Records
      • Per Line and Purpose Configurable Syslog and Debug Options

      Physical Interfaces

      • 8 port standard FXS voice ports (RJ-11)
      • RJ-21 (50-pin telco connector) multi-port voice connection
      • 1 WAN 100baseT RJ-45 Ethernet Port (IEEE 802.3)
      • Reset button

      Subscriber Line Interface Circuit (SLIC)

      • Ring Voltage: 40-90 Vpk Configurable
      • Ring Frequency: 20 Hz - 25 Hz
      • Ring Waveform: Trapezoidal
      • Maximum Ringer Load: 5 REN
      • On-hook/off-hook Characteristics:
        • On-hook voltage (tip/ring): -46 ~ -56V
        • Off-hook current: 18-25 mA
        • Terminating Impedance: 600 ohm resistive or 270 ohm + 750ohm//
      • 150nF complex impedance
      • Frequency Response 300 – 3400Hz
      • Return Loss (600 ohm, 300-3400Hz) Up to 20dB
      • Insertion Loss (1 Vrms @1 kHz) 3dB – 4dB
      • THD (350 mV peak @ 300 Hz) Up to 3%
      • Idle Channel Noise -72 dB (typ.)
      • Longitudinal Balance 55 dB (typ.)
      • Off Hook Threshold (Line Seizure) Rdc
      • On Hook Threshold (Line Release) Rdc >10000 ohm
      • Rdc DC Supervisory Range Rdc > 450 ohm

      Regulatory Compliance

      • FCC (Part 15 Class B), CE, ICES-003, C-Tick Certification, RoHS, UL

      Power Supply Switching Type (100-240v) Automatic DC Input Voltage: 12V DC at 3.0 A Max. Power Adapter: 100-240v - 50-60Hz AC Input

      Indicator Lights/LED

      • Power, Ethernet, USB, Voice Status, Phone 1,2,3,4,5,6,7,8


      • Quick Installation, User, and Configuration Guides are downloaded from www.Linksys.com
      • Administration Guide - Service Providers Only
      • Provisioning Guide - Service Providers Only


      • Dimensions 6.69 x 1.54 x 8.66" (170 x 39 x 220 mm) W x H x D
      • Weight 2.85 lbs (1.30 kg)
      • Operating Temp. 32 to 113°F (0°C to 45°C)
      • Storage Temp. -13 to 185°F (-20°C to 85°C)
      • Operating Humidity 10% to 90% Non-Condensing, operating and non-operating
      • Storage Humidity 10% to 90% Non-Condensing, operating and non-operating

      Resources and Documents