Linksys SPA942 Core Features
| Features | Specifications |
| Application Targets : |
Common Area Cubicle General Executive Receptionist |
| Lines : | 4 |
| Display Type : |
Backlit |
| Display Size : | Medium |
| Ethernet Ports : |
2 |
| PoE Support : | Yes |
| Headset Jack : | 2.5mm |
| Expansion Module Support : | No |
Linksys SPA942 Summary
Linksys SPA942 - Four Line IP Phone
This phone does not come with a power supply in the box. Please add it above if you are not using a PoE Switch!
Advanced, Feature-Rich, Multi-Line IP Phone for Business or a Home Office
Comprehensive Interoperability and SIP Based Feature Set
Stylish and functional in design, the SPA942 IP 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 SPA942 leverages industry-leading VoIP technology from Linksys to deliver an upgradeable high-quality IP Phone that is unparalleled in features, value, and support.
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 service 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.
Standard features on the SPA942 include two active lines, dual-switched Ethernet ports, 802.3af Power Over Ethernet (PoE)* support, a high-resolution graphical display, full-duplex speakerphone, and a 2.5 mm headset 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.
The SPA942 uses standard encryption protocols to provide secure remote provisioning and unobtrusive in-service software upgrades. Linksys secure 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 hassle and expense of managing, preloading, and re-configuring customer premise equipment (CPE).
| Linksys SPA942 Features |
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| Linksys SPA942 Hardware |
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Data Networking
- 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)
- 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/q Layer 2 QoS
- SNTP Simple Network Time Protocol (RFC 2030)
Voice Gateway
- 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 (including STUN)
- SIPFrag (RFC 3420)
- Secure (Encrypted) Calling via Pre-Standard Implementation of Secure RTP
- Codec Name Assignment
- Voice Algorithms:
- 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 Support
- Adjustable Audio Frames Per Packet
- DTMF—In-band and Out-of-Band (RFC 2833) (SIP INFO)
- Flexible Dial Plan Support with Inter-Digit Timers
- IP Address/URI Dialing Support
- Call Progress Tone Generation
- Jitter Buffer—Adaptive
- Frame Loss Concealment
- VAD—Voice Activity Detection with Silence Suppression
- Attenuation/Gain Adjustments
- MWI—Message Waiting Indicator Tones
- VMWI—Voice Mail Waiting Indicator—Via NOTIFY, SUBSCRIBE
- Caller ID Support (Name and Number)
- Third Party Call Control (RFC 3725)
Security
- Password-Protected System, Preset 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
Indicator Lights/LED:
- Status LED
- Message Waiting Indicator LED
- Flash Button with Indicator LED
- LED Test Function
Documentation:
- Quick-Start Installation and Configuration Guide
- User Guide
- Administration Guide
- Provisioning Guide - For Service Providers Only
| Linksys SPA942 Package Contents |
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Linksys SPA VoIP Phone Comparison Chart
| Linksys SPA Phone Model | Voice Lines | Ethernet Ports | Graphical Display | PoE Support | AC Power Included |
| Linksys SPA901 | 1 | 1 | No | No | Yes |
| Linksys SPA921 | 1 | 1 | Yes | No | Yes |
| Linksys SPA922 | 1 | 2 | Yes | Yes | No |
| Linksys SPA941 | 2 - 4 | 1 | Yes | No | Yes |
| Linksys SPA942 | 2 - 4 | 2 | Yes | Yes | No |
| Linksys SPA962 | 6 | 2 | Yes | Yes | No |





