PRODUCT DATA
BUSINESS SERIES
Linksys
A Division of Cisco Systems, Inc.
121 Theory
Irvine, CA 92617 USA
E-mail:
Web:
www.linksys.com
Linksys products are available in more
than 50 countries, supported by
12 Linksys Regional Offices throughout
the world. For a complete list of local
Linksys Sales and Technical Support
contacts, visit our worldwide website
at www.linksys.com
Check the product package and contents for specific features supported. Specifications are subject to change without notice.
Linksys is a registered trademark or trademark of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries.
Copyright © 2008 Cisco Systems, Inc. All rights reserved. Other brands and product names are trademarks or registered trademarks of their
respective holders.
8022020NC-KO
Model:
SPA922
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
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)
Linksys Phone Comparison Chart
Model
Voice Lines
Ethernet
Ports
High-Resolution
Graphical Display
Power over Ethernet
Support
SPA901
1
1
No
No
SPA921
1
1
Yes
No
SPA922
1
2
Yes
Yes
SPA941
2 to 4
1
Yes
No
SPA942
2 to 4
2
Yes
Yes
SPA962
6
2
Yes, Color
Yes
