Linksys SPA942 IP Phone


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Linksys SPA942 IP Phone

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Available Options:
Power Supply Unit:

Availability: Discontinued

Please note that the Linksys SPA942 has been discontinued. We recommend the Cisco SPA504G as a good alternative.

The new Linksys SPA942 is a functionally powerful, easy to use business phone. Featuring comprehensive interoperability and a secure mass deployment capability and more:

  1. Standard Features on the SPA-942 include:
    - Two Active Lines
    - Dual switched Ethernet ports
    - Power-over-Ethernet
    - High Resolution graphical display
    - Full duplex speaker-phone
    - 2.5mm head-set port.
  2. The SPA942 is an affordable, business class telephone which can be easily configured as a two line phone. With a simple software update the SPA-942 is upgradeable to four lines.
  3. Each line can be independently configured to use a unique phone number (or extension), or can be configured to use a shared number that is assigned to multiple phones.
  4. The SPA-942 can be used in SOHO, enterprise, small to medium business service offerings including IP PBX, hosted IP telephony and IP Centrex along with residential use.
  5. The SPA942 is based on industry leading VoIP technology from Linksys to deliver a high quality IP phone that is unparalleled in features, value and support.
  6. The SPA942 is simple to use, with well laid out function keys " " utilises the call processing functionality found in existing Linksys products.

Key Features

  • Up to 4 lines with independent configuration
  • Dual switched Ethernet ports
  • Call logs- made, answered, missed calls, with time- 60 entries each
  • Caller ID
  • Multiple ringtones with selectable default ring tone per line
  • Personal address book with auto dial- 100 entries
  • Speed dialling
  • Hands free option
  • Call hold, call waiting, call transfer, call conferencing, Do not disturb.
  • Built in web server for administration
  • 128x64 Monochrome LCD graphical display with back light
  • Automated provisioning- up to 256 byte encryption
    - TFTP
    - DHCP option 66 support
    - HTTP
    - HTTPS

Data Networking

  • MAC Address (IEEE 802.3)
  • IPv4- Internet Protocol Version 4 (RFC 791)
  • DHCP Client- Dynamic Host Configuration Protocol (RFC 2131)
  • ICMP- Internet Control Message Protocol (RFC 792)
  • TCP- Transmission Control Protocol (RFC 793)
  • UDP- User Datagram Protocol (RFC 768)
  • 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/q - Layer 2 Qos
  • SNTP- Simple Network Time Protocol (RFC 2030)
  • ARP- Address Resolution Protocol
  • DNS- A Record (RFC 1706) SRV Record (RFC 2782)

Voice Over IP

  • SIPv2- Session Initiation Protocol Version 2 (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)
  • SIPFrag (RFC 3420)
  • Secure (Encrypted) Calling via Pre-Standard Implementation of Secure RTP
  • Codec Name Assignment

Voice Algorithms

  • G.711 (A-law and mu-law)
  • G.726 (16/24/32/40 kbps)
  • G.729 A
  • G.723.1 (6.3 kbps, 5.3 kbps)
  • Jitter Buffer- Adaptive
  • Frame Loss Concealment
  • VAD- Voice Activity Detection w/ Silence Suppression
  • Attenuation/Gain Adjustments
  • MWI- Message Waiting Indicator Tones
  • VMWI- Voice Mail Waiting Indicator
  • Caller ID Support (Name " " Number)
  • Third Party Call control (RFC 3725)
  • Dynamic Payload Support
  • Adjustable Audio Frames per Packet
  • DTMF: In-band " " Out-of-Band (RFC 2833) (SIP INFO)
  • Flexible Dial Plan Support with Configurable Inter-Digit Timers
  • IP Address/URI Dialing Support
  • Call Progress Tone Generation


  • Password Protected System Reset to Factory Default and Configuration
  • Provisioning/Configuration/Authentication
  • HTTPS with Factory Installed Client Certificate
  • HTTP Digest- Encrypted Authentication via MD5 (RFC 1321) -Up to 256-bit AES Encryption
  • Password Protected Admin and User Access Authority

Provisioning, Administration and Maintenance

  • Web Browser Administration and Configuration via Integral Web Server
  • Automated Provisioning " " Upgrade Availability via HTTPS
  • Report Generation and Event Logging
  • Syslog and Debug Server Records
  • Per Line and Purpose Configurable Syslog and Debug Options
  • Non-Intrusive, In-Service Upgrades

Physical Data Interfaces

  • 2 x 100baseT RJ-45 Ethernet Ports (IEEE 802.3)

Voice I/O Interfaces

  • Handset: RJ-7 Connector
  • Speaker-phone " " Microphone- Built-in
  • Headset 2.5mm Port

Regulatory Compliance

  • FCC Part 15 Class A, B
  • CE Mark

Power Supply

  • Switching Type with Modular Wall Plug Clip- County/Region Specific
  • Power Consumption: 5 WATTs
  • Power Adaptor: 100-240v- 50-60Hz (26-34VA) AC Input, 1.8m cord
  • DC Input Voltage: +5 VDC at 2.0 A Max

Indicator LEDs- Lights

  • Line (4)
  • Speaker-phone
  • Headset
  • Message Waiting
  • Mute + Status (Provision, Alert, Upgrade)
  • Voicemail Message Retrieval button


  • Operating Temperature 32 to 113 F (0 to 45 C)
  • Relative Humidity 10 to 90% non-condensing, operating and non-
  • Storage Temperature -13 to 185 F (-25 to 85 C)

Box Contents

  • 1- Linksys IP Phone- Colour- Dark Grey
  • 1- Handset- Colour- Dark Grey
  • 1- RJ-45 Ethernet Cable- 1.8m (3ft) Cord- Colour Black
  • 1- Linksys Quick Start Guide
  • 1- Handset Cord- Colour- Dark Grey
  • 1- Telephone Desk Stand
  • 1- 5v Power Adapter- 1.8m (3ft) Cord (purchased separately)


  • Administration Guide- Available to Service Providers Only
  • Provisioning Guide- Available to Service Providers Only
  • Quick-Start Guide
  • User Guide

The Linksys SPA 942 requires a Power adapter if your network does not support PoE (power over ethernet).

Please select the appropriate option from the drop-down menu below.

Linksys SPA Series VoIP Phone (SIP) Comparison Table
SPA Model
Voice Lines
Ethernet Ports
High Resolution Display
Power Over Ethernet
Mains Power Supply
Y Colour

This product has been discontinued.

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