LINKSYS SPA-942 User Guide

Linksys SPA-942

VoIP Telephone

The new Linksys SPA-942 is a functionally
powerful, easy to use business phone, featuring
comprehensive interoperability and a secure
mass deployment capability. Standard features
on the SPA-942 include two active lines, dual
switched Ethernet ports, Power-over-Ethernet, a
high resolution graphical display, a full duplex
speaker-phone and a 2.5mm head-set port.

The SPA-942 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. 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.

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.

The SPA-942 is based on industry leading VoIP
technology from Linksys to deliver a high quality
IP phone that is unparalleled in features, value
and support. The SPA-942 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

• Hands free option

• Call hold, call waiting, call

transfer, call conferencing,
Do not disturb.

• 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

• 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

Technical Data

SPA-942

Data Networking

• MAC Address (IEEE 802.3)

• IPv4- Internet Protocol Version 4 (RFC 791)

• ARP- Address Resolution Protocol

• DNS- A Record (RFC 1706) SRV Record (RFC 2782)

• 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)

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)

• 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

• 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)

Security

• Password Protected System Reset to Factory Default and Configuration

• Password Protected Admin and User Access Authority

• Provisioning/Configuration/Authentication

-HTTPS with Factory Installed Client Certificate

-HTTP Digest- Encrypted Authentication via MD5 (RFC 1321)

-Up to 256-bit AES Encryption

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

• DC Input Voltage: +5 VDC at 2.0 A Max

• Power Consumption: 5 WATTs

• Power Adaptor: 100-240v- 50-60Hz (26-34VA) AC Input, 1.8m cord

Indicator LEDs- Lights

• Line (4)

• Speaker-phone

• Headset

• Message Waiting

• Mute + Status (Provision, Alert, Upgrade)

• Voicemail Message Retrieval button

Environmental

• Operating Temperature 32 to 113 F (0 to 45 C)

• Storage Temperature -13 to 185 F (-25 to 85 C)

• Relative Humidity 10 to 90% non-condensing, operating and non-

operating

Box Contents

• 1- Linksys IP Phone- Colour- Dark Grey

• 1- Handset- Colour- Dark Grey

• 1- Handset Cord- Colour- Dark Grey

• 1- Telephone Desk Stand

• 1- 5v Power Adapter- 1.8m (3ft) Cord

• 1- RJ-45 Ethernet Cable- 1.8m (3ft) Cord- Colour Black

• 1- Linksys Quick Start Guide

Documentation

• Quick-Start Guide

• User Guide

• Administration Guide- Available to Service Providers Only

• Provisioning Guide- Available to Service Providers Only

Warranty

• One Year Hardware- Limited

Provisioning, Administration and
Maintenance

• Web Browser Administration and Configuration via Integral Web Server

• Automated Provisioning & Upgrade Availability via HTTPS

• Non-Intrusive, In-Service Upgrades

• Report Generation and Event Logging

• Syslog and Debug Server Records

• Per Line and Purpose Configurable Syslog and Debug Options

Linksys Phone Comparison Chart

SPA

Model

SPA 921 1 1 Y N

SPA 922 1 2 Y Y

SPA 941 2-4 1 Y N

SPA 942 2-4 2 Y Y

Voice
Lines

Ethernet

Ports

High RES
Graphical

Display

PoE