Linksys SPA-941 Instruction Manual

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© 2003 - 2005 Linksys, a Division of Cisco Systems Proprietary (See Copyright Notice on Page 2)
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Linksys, Inc.
SPA941 Administration Guide
October 2005
Version 0.1 (DRAFT)

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© 2003 - 2005 Linksys, a Division of Cisco Systems Proprietary (See Copyright Notice on Page 2)
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Disclaimer – Please Read:
This document contains implementation examples and techniques using Linksys, Inc.
and, in some instances, other company’s technology and products and is a
recommendation only and does not constitute any legal arrangement between Linksys,
Inc. and the reader, either written or implied. The conclusions reached and
recommendations and statements made are based on generic network, service and
application requirements and should be regarded as a guide to assist you in forming your
own opinions and decision regarding your particular situation. As well, Linksys reserves
the right to change the features and functionalities for products described in this
document at any time. These changes may involve changes to the described solutions
over time.
Use of Proprietary Information and Copyright Notice:
This document contains proprietary information that is to be used only by Linksys
customers. Any unauthorized disclosure, copying, distribution, or use of this information
is prohibited.
Please Note:
Design and specifications are subject to change without notice.

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Table of Contents
1HOW TO USE THIS DOCUMENT.......................................................................................................8
2IMPORTANT OPERATING INFORMATION........................................................................................8
Compliance and Safety Information..........................................................................................................8
Network and Service Configuration Settings.........................................................................................10
3SPA941 OVERVIEW..........................................................................................................................10
SPA941 Hardware Features:....................................................................................................................11
SPA941 Functionalities ............................................................................................................................12
Navigating the SPA941 GUI......................................................................................................................13
Definitions for the Four Call Appearances.............................................................................................14
4CALL FEATURES ..............................................................................................................................15
Selecting Audio I/O Device and Line.......................................................................................................15
Making Calls ..............................................................................................................................................16
Answering Calls ........................................................................................................................................17
Ending Calls ..............................................................................................................................................17
Hold and Resume......................................................................................................................................17
Call-Waiting ...............................................................................................................................................17
Three way Conference..............................................................................................................................18
Attended Call Transfer..............................................................................................................................18
Blind Call Transfer....................................................................................................................................19
Call Back....................................................................................................................................................19
Message Waiting Indication (MWI)..........................................................................................................20
Accessing Voice Mail................................................................................................................................20
Muting Calls...............................................................................................................................................20
Shared Call Appearances.........................................................................................................................20
Line Key LED Behavior.............................................................................................................................21
Other Supplementary Services................................................................................................................22
Block Caller ID...........................................................................................................................................22
Block Anonymous Call.............................................................................................................................22
Do Not Disturb (DND)................................................................................................................................22

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Secure Call.................................................................................................................................................22
Secure Call Implementation:....................................................................................................................22
User Interface .........................................................................................................................................23
Service Provider Requirements..............................................................................................................24
5MEMORY FEATURES AND OTHER USER ACCESSIBLE SETTINGS...........................................25
Call Logs....................................................................................................................................................25
Personal Directory....................................................................................................................................26
Entering and Saving Settings..................................................................................................................27
Preferences................................................................................................................................................28
Speed Dials................................................................................................................................................28
Caller and Called Name Matching...........................................................................................................29
Dialing Assistance....................................................................................................................................29
Time/Date...................................................................................................................................................29
Daylight Saving Time................................................................................................................................30
Checking Phone Status............................................................................................................................31
Reboot and Restart...................................................................................................................................31
Factory Reset ............................................................................................................................................31
Password Protection ................................................................................................................................32
Audio Volume Adjustment.......................................................................................................................32
Ring Tone...................................................................................................................................................32
Star Code to Activate/Deactivate Certain Services ...............................................................................33
Disabling Services....................................................................................................................................35
6VOICE AND SIGNALING FEATURES...............................................................................................36
SIP Proxy Dynamic Redundancy: ...........................................................................................................36
Re-registration with Primary SIP Proxy Server......................................................................................36
Codec Name Assignment.........................................................................................................................36
Voice Algorithms: .....................................................................................................................................37
G.711 (A-law and mµ-law)......................................................................................................................37
G.726......................................................................................................................................................37
G.729A....................................................................................................................................................37
G.723.1...................................................................................................................................................37
Codec Selection........................................................................................................................................37

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Dynamic Payload ......................................................................................................................................37
Adjustable Audio Frames Per Packet.....................................................................................................37
DTMF: In-band & Out-of-Band (RFC 2833) (SIP INFO *)........................................................................38
Call Progress Tone Generation...............................................................................................................38
Call Progress Tone Pass Through..........................................................................................................38
Jitter Buffer – Dynamic (Adaptive)..........................................................................................................38
Voice Activity Detection with Silence Suppression & Comfort Noise Generation.............................38
Configurable Dial Plan with Interdigit Timers........................................................................................38
Network Address Translation (NAT) Traversal......................................................................................40
VoIP-NAT Interworking.............................................................................................................................40
7DATA NETWORKING FEATURES SUPPORTED............................................................................41
MAC Address (IEEE 802.3)....................................................................................................................42
IPv4 – Internet Protocol Version 4 (RFC 791) upgradeable to v6 (RFC 188.........................................42
ARP – Address Resolution Protocol.......................................................................................................42
DNS – A Record (RFC 1706), SRV Record (RFC 2782).......................................................................42
DiffServ (RFC 2475) and ToS – Type of Service (RFC 791/1349) ........................................................42
DHCP Client – Dynamic Host Configuration Protocol (RFC 2131)........................................................42
ICMP – Internet Control Message Protocol (RFC792)...........................................................................42
TCP – Transmission Control Protocol (RFC793)...................................................................................42
UDP – User Datagram Protocol (RFC768).............................................................................................42
RTP – Real Time Protocol (RFC 1889) (RFC 1890)..............................................................................42
RTCP – Real Time Control Protocol (RFC 1889)...................................................................................42
SRTP - Secure Real Time Control Protocol (RFC XXXX).....................................................................42
8CONFIGURING AND PROVISIONING OVERVIEW.........................................................................42
9WEB INTERFACE ADMINISTRATION AND SECURITY..................................................................42
Web Interface Conventions......................................................................................................................43
Web Interface Administration Privileges................................................................................................43
Web Interface Basic and Advanced Views.............................................................................................44
10 SPA941 CONFIGURATION PARAMETERS.....................................................................................44
Notations....................................................................................................................................................45
Data Types.................................................................................................................................................45
System Parameters...................................................................................................................................51
System Configuration ..........................................................................................................................51
Network Configuration.........................................................................................................................51
Provisioning Parameters..........................................................................................................................52

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SIP Parameters..........................................................................................................................................54
Regional Parameters ................................................................................................................................59
Phone Parameters.....................................................................................................................................66
Extension 1 – 4 Parameters .....................................................................................................................69
User Parameters........................................................................................................................................74
Info Parameters (Read Only)....................................................................................................................75
11 DIAL PLAN.........................................................................................................................................77
12 PROVISIONING OVERVIEW.............................................................................................................81
Provisioning ..............................................................................................................................................81
Provisioning Capabilities.........................................................................................................................81
Configuration Profile ................................................................................................................................82
13 PROVISIONING FLOW......................................................................................................................84
Pre-Provisioning .......................................................................................................................................84
Provisioning Proper..................................................................................................................................84
14 FIRMWARE UPGRADE.....................................................................................................................85
Premium Features.....................................................................................................................................86
15 FUNCTIONAL URLS FOR UPGRADES, REBOOT AND RESYNCH...............................................86
Upgrade URL .............................................................................................................................................86
Resync URL...............................................................................................................................................86
Reboot URL ...............................................................................................................................................87
16 PERFORMANCE REPORTING FEATURES.....................................................................................87
Call Statistics and Reporting...................................................................................................................87
Report Generation and Event Logging...................................................................................................88
Error and Log Reporting ..........................................................................................................................89
Syslog and Debug Server Records.........................................................................................................89
17 TROUBLESHOOTING.......................................................................................................................89
Phone does not “turn on” or “boot up”....................................................................................................89
Phone will not make or receive calls. .....................................................................................................90
Calls with Poor Voice Quality..................................................................................................................91
18 CUSTOMER SUPPORT METHODS .................................................................................................91
19 CARE FOR THE SPA941 PHONE.....................................................................................................92
Do not expose the phone to heat, sun, cold, water................................................................................92

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Cleaning the phone.................................................................................................................................92
20 ACRONYMS.......................................................................................................................................93
21 GLOSSARY........................................................................................................................................94

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•How to use this document
This Administration Guide provides instructions on managing and operating the SPA941 IP Telephone.
The Guide covers the following topics:
•General Operating Information
•Call, Voice, Signaling Features, and Hardware Functionality Descriptions
•Configuration, Performance, and Troubleshooting Guidelines
•Provisioning
The SPA941 User Guide provides more details on how to use the phone’s features via the phone’s
physical interfaces, including the softkeys, display menus, the key pad, and dedicated buttons. The
Administrative Guide is helpful for network administrators that need detailed information on how to
configure the phone from the phone’s Web Server, or need access to the phone’s troubleshooting and
performance functions. Finally, the document also covers provisioning of the SPA941.
•Important Operating Information
Please insure the safe operation of the SPA941 by following the operating instructions in this section.
Compliance and Safety Information
This equipment has been tested and found to comply with the limits for a Class B digital device in
accordance with the specifications in part 15 of the FCC rules. This product bears the CE Marking
indicating compliance with the 89/336/EEC directive. Standards to which conformity is Declared: EN
61000-4-2:1995, EN 61000-4-3:1997, EN 61000-4-4:1995, EN 61000-4-5:1995, EN 61000-4-6:1996, EN
61000-4-8:1994, EN 61000-4-11:1994, EN 61000-3-2:2001, EN 61000-3-3:1995 & EN 55022:1998 Class
B Modifications to this product not authorized by Linksys could void FCC approval, thereby terminating
end user authority to use this product.
For indoor use only.
Read installation instructions before connecting to a power source. The electric plug and socket must be
accessible at all times as this is the main method to disconnect power from the device.
Shock Hazard:
Do not operate near water or similar fluid.
Do not work with this device during periods of lightning activity.
Do not touch wires at the end of cables or within sockets.
One Year Limited Hardware Warranty
Linksys provides a one (1) year limited hardware warranty. Linksys warrants to customer that this product
will conform to its published specifications and will be free from defects in material and
workmanship at the time of delivery and for a period of one year thereafter. Without limiting the

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foregoing, this warranty does not cover any defect resulting from (i) any design or specification supplied
by an entity other than Linksys, (ii) non-observance of technical operating parameters (e.g., exceeding
limiting values), or (iii) misuse, abuse, abnormal conditions or alteration by anyone other than Linksys.
Replacement, Repair, Refund:
After the receipt of an RMA (Return Materials Authorization) request, Linksys will attempt to refund, repair
or replace this device. To receive an RMA number for this device, contact the party from whom it.

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Network and Service Configuration Settings
This unit may have been supplied by or sponsored by a telephone service provider. If so, the service
provider or network administrator who supplied the unit may have provided a pre-configuration of the
network and service settings. Depending on the configuration policy, end user access to the local
configuration settings may be restricted or inaccessible. Therefore, some of the network and service
configuration setting instructions described in the following sections may not be available on all units.
•SPA941 Overview
The SPA941 is a SIP based IP telephone offered by Linksys, a division of Cisco Systems. The SPA941
supports up to four phones lines of operation. It has a pixel-based display and a graphical user interface
that provides access to the phone’s functions and features. Figure 1.1 shows an illustration of the phone.