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Brand Cisco Small Business
Model SPA942NA
Type Telephone
Standards MAC Address (IEEEE-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)

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)
Protocols 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 Network - NAT (including STUN).

SIPFrag (RFC 3420)

Secure (Encyrpted) 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.729A / 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 InterDigit Timers.

IP Address/URI Dialing Support

Call Progress Tone Generation

Jitter Buffer - Adaptive

Frame Loss Concealment

VAD - Voice Activity Detection with Silence Suppression


MWI- Message Waiting Indicator tones

VMWI - Visual Message Waiting Indicator - Via NOTIFY, SUBSCRIBE.

Third Party Call Control (RFC 3725)
Security Password protected system reset 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 AES Encryption
Ports Headset Jack—2.5 millimeter port
Display 128x64 Monochrome LCD Graphical Display
LEDs Four (4) Call Appearance/Line Buttons with Associated Tricolor LED.

Line LED State Indication: Active, Idle, On Hold, Unregistered.

Speakerphone On/Off Button with LED

Headset On/Off Button with LED

Mute Button with LED

Message Waiting Indicator LED

Voicemail Message Retrieval Button

Hold Button

LED Test Function
Power DC Input Voltage: +5 Volts DC at 2.0 Amps Maximum

Power Consumption: 5 Watts

Switching Type (100-240v) Automatic

Optional Power Adapter (models PA100-NA, PA100-EU, PA100-UK, PA100-AU): 100-240v - 50-60Hz (26-34VA) AC Input
Dimensions 7.68"w x 6.30"h x 7.09"d
Weight 2.15 lbs.
Temperature Operating Temp. 32 to 113°F (0 to 45°C)
Storage Temp. -13 to 185°F (-25 to 85°C)
Humidity Operating Humidity 10 to 90%, Noncondensing
Storage Humidity 10 to 90%, Noncondensing
Specifications Dedicated Illuminated On/Off Buttons for Audio Mute, Headset, and Speakerphone

Four Soft Key Buttons

Four Way-Rocking Directional Button for Menu Navigation

Support for up to two attached Attendant Consoles; adds up to 64 programmable buttons

Voice Mail Message Waiting Indicator Light

Voice Mail Message Retrieval Button

Dedicated Hold Button

Settings Button for Access to Feature, Set-up, and Configuration Menus

Volume Control Rocking Up/Down Button Controls Handset, Headset, Speaker, Ringer

Standard 12-Button Dialing Pad

High-Quality Handset (RJ-7 connector) and Cradle

Built-In High Quality Microphone and Full-Duplex Speakerphone

Two Ethernet LAN Ports with Integrated Ethernet Switch – 100BaseT RJ-45

802.3af Compliant Power over Ethernet (PoE)

Optional 5 volt DC Universal (100-240 Volt) Switching (Power Supply is Ordered Separately)
Features 2 or 4-Line IP Telephone with 2 Port Ethernet Switch, PoE and Hi-Res Display.

Advanced, Affordable, Feature Rich IP Phone for the Home Office and Business!

Stylish and functional in design, the SPA942 VoIP Phone is ideal for a residence or business using a hosted IP telephony service, an IP PBX, or a large-scale IP Centrex deployment. The SPA941 leverages
industry leading VoIP technology from Linksys to deliver an upgradeable high quality IP Phone that is unparalleled in features, value, and support.

Standard features on the SPA942 include two active lines, dual switched Ethernet ports, 802.3af PoE support, a high resolution graphical display, speakerphone, and a 2.5 mm head-set port. With a simple software update, the SPA942 is upgradeable to a four line phone. 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.

Based on the SIP standard, the SPA942 has been tested to ensure comprehensive interoperability with equipment from VoIP infrastructure leaders enabling service providers to quickly roll-out competitive, feature rich services to their customers. With hundreds of features and configurable sevice parameters, the SPA942 addresses the requirements of traditional business users while leveraging the advantages of IP telephony. Features such as easy station moves, presence, and shared line appearances (across local
and geographically dispersed locations) are just some of the many advantages of the SPA942.
Package Contents 1 SPA942 IP Phone, Handset, and Stand

1 Handset Cord

1 RJ-45 Ethernet Cable

1 Quick Installation Guide (Optional Power Supply is Ordered Separately)
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