Linksys RTP300 - Broadband Router With 2 Phone Ports Instruction Manual

ADMINISTRATION
GUIDE
Linksys
ATA Administration Guide, Version 2.0

Table of Contents
Linksys ATA Administration Guide i
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Document Audience vii
Supported Firmware viii
Document Conventions viii
Document Purpose and Contents ix
Related Documentation x
Online Resources xi
Copyright and Trademarks xi
Technical Support xi
Finding Information in PDF Files xii
Finding Text in a PDF xii
Finding Text in Multiple PDF Files xii
Chapter 1: Introducing Linksys Analog Telephone Adapters . . . 15
Comparison of ATA Devices 16
Linksys ATA Connectivity Requirements 18
Linksys PAP2T Connectivity 18
Linksys SPA2102 Connectivity 19
Linksys SPA3102 Connectivity 20
Linksys SPA8000 Connectivity 21
ATA Software Features 22
Voice Supported Codecs 22
SIP Proxy Redundancy 23
Other Linksys ATA Software Features 23
Chapter 2: Basic Administration and Configuration of Your Linksys
ATA Device . . . . . . . . . . . . . . . . . . . . . . . . . 28
Basic Services and Equipment Required 28
Downloading Firmware 29
Basic Installation and Configuration 30
Upgrading the Firmware for the Linksys ATA Device 30
Setting up Your Linksys ATA Device 31
Using the Administration Web Server 31
Connecting to the Administration Web Server 32
Setting Up the WAN Configuration for Your Linksys ATA Device 32
Registering to the Service Provider 33
Advanced Configurations 34
Upgrading, Rebooting, and Resyncing Your Linksys ATA Device 34
Upgrade URL 34
Resync URL 35
Reboot URL 35
Provisioning Your Linksys ATA Device 35
Provisioning Capabilities 36
Configuration Profile 36
Chapter 3: Configuring Your System for ITSP Interoperability . . 38
Network Address Translation (NAT) and Voice over IP (VoIP) 38
NAT Mapping with Session Border Controller 38
NAT Mapping with SIP-ALG Router 38
Configuring NAT Mapping with a Static IP Address 39

Table of Contents
Linksys ATA Administration Guide ii
Configuring NAT Mapping with STUN 40
Determining Whether the Router Uses Symmetric or Asymmetric NAT 41
Firewalls and SIP 42
Configuring SIP Timer Values 43
Chapter 4: Configuring Voice Services . . . . . . . . . . . . . . 44
Supported Codecs 44
Using a FAX Machine (SPA2102, SPA3102 or SPA8000) 45
Fax Troubleshooting 46
Managing Caller ID Service 47
Silence Suppression and Comfort Noise Generation 48
Configuring Dial Plans 49
About Dial Plans 49
Editing Dial Plans 55
Secure Call Implementation 57
Enabling Secure Calls 57
Secure Call Details 58
Using a Mini-Certificate 58
Generating a Mini Certificate 59
SIP Trunking and Hunt Groups on the SPA8000 61
About SIP Trunking 62
Setting the Trunk Group Call Capacity 64
Inbound Call Routing for a Trunk Group 64
Contact List for a Trunk Group 65
Outgoing Call Routing for a Trunk Group 66
Configuring a Trunk Group 67
Trunk Group Management 68
Setting the Hunt Policy 69
Additional Notes About Trunk Groups 69
Chapter 5: Configuring Music on Hold . . . . . . . . . . . . . . 70
Using the Internal Music Source for Music On Hold 70
Using the Internal Music Source 70
Changing the Music File for the Internal Music Source 71
Configuring a Streaming Audio Server 71
About the Streaming Audio Server 71
Configuring the Streaming Audio Server 72
Using the IVR with an SAS Line 73
Chapter 6: Configuring the PSTN (FXO) Gateway . . . . . . . . 74
Connecting to PSTN and VoIP Services 74
How VoIP-To-PSTN Calls Work 75
One-Stage Dialing 75
Two-Stage Dialing 76
How PSTN-To-VoIP Calls Work 77
Terminating Gateway Calls 77
VoIP Outbound Call Routing 78
Configuring VoIP Failover to PSTN 79
Sharing One VoIP Account Between the FXS and PSTN Lines 80
Other Options 81

Table of Contents
Linksys ATA Administration Guide iii
PSTN Call to Ring Line 1 81
Symmetric RTP 81
Call Progress Tones 81
Call Scenarios 82
PSTN to VoIP Call with and Without Ring-Thru 82
VoIP to PSTN Call With and Without Authentication 83
Call Forwarding to PSTN Gateway 85
Appendix A: Linksys ATA Routing Field Reference . . . . . . . . . . 86
Status page 86
Product Information section 86
System Status section 87
WAN Setup page 87
Internet Connection Settings section 88
Static IP Settings section 88
PPPoE Settings section 88
Optional Settings section 89
MAC Clone Settings section 89
Remote Management section 90
QOS Settings section 90
VLAN Settings section 90
LAN Setup page 90
Networking Service section 91
LAN Networking Settings section 91
Static DHCP Lease Settings section 91
Application page 92
Port Forwarding Settings section 92
DMZ Settings section 92
Miscellaneous Settings section 93
System Reserved Ports Range section 93
Appendix B: Linksys ATA Voice Field Reference . . . . . . . . . . . 94
Info page 94
Product Information section 95
System Status section 95
Line Status section 95
System Information section (PAP2T) 97
PSTN Line Status section (AG310 and SPA3102) 97
Trunk Status section (SPA8000) 99
System page 99
System Configuration section 100
Internet Connection Type section (PAP2T) 100
Optional Network Configuration section (PAP2T) 100
Miscellaneous Settings section (not used with PAP2T) 101
SIP page 102
SIP Parameters section 102
SIP Timer Values (sec) section 103
Response Status Code Handling section 105
RTP Parameters section 105
SDP Payload Types section 106
NAT Support Parameters section 107

Table of Contents
Linksys ATA Administration Guide iv
Trunking Parameters section (SPA8000) 109
Regional page 110
Call Progress Tones section 110
Distinctive Ring Patterns section 112
Distinctive Call Waiting Tone Patterns section 113
Distinctive Ring/CWT Pattern Names section 113
Ring and Call Waiting Tone Spec section 114
Control Timer Values (sec) section 114
Vertical Service Activation Codes section 116
Vertical Service Announcement Codes section (SPA2102, SPA8000) 119
Outbound Call Codec Selection Codes section 120
Miscellaneous section 121
Line page 123
Line Enable section 124
Streaming Audio Server (SAS) section 124
NAT Settings section 125
Network Settings section 125
SIP Settings section 126
Call Feature Settings section 128
Proxy and Registration section 128
Subscriber Information section 130
Supplementary Service Subscription section 130
Audio Configuration section 132
Gateway Accounts section (SPA3102/AG310) 132
VoIP Fallback to PSTN section (SPA3102/AG310) 133
Dial Plan section 133
FXS Port Polarity Configuration section 135
Trunk Group page (SPA8000) 135
Line Enable section 135
Network Settings section 136
SIP Settings section 136
Subscriber Information section 138
Dial Plan section 139
NAT Settings section 139
Proxy and Registration section 140
PSTN Line page (AG310 and SPA3102) 141
Line Enable section 142
NAT Settings section 142
Network Settings section 142
SIP Settings section 143
Proxy and Registration section 145
Subscriber Information section 146
Audio Configuration section 146
Dial Plans section 149
VoIP-To-PSTN Gateway Setup section 149
VoIP Users and Passwords (HTTP Authentication) section 150
Ring Settings section 151
FXO (PSTN) Timer Values (sec) section 151
PSTN Disconnect Detection section 153
International Control (Settings) section 155
User page 156

Table of Contents
Linksys ATA Administration Guide v
Call Forward Settings section 157
Selective Call Forward Settings section 157
Speed Dial Settings section 158
Supplementary Service Settings section 158
Distinctive Ring Settings section 159
Ring Settings section 159
PSTN User page (AG310 and SPA3102) 160
PSTN-To-VoIP Selective Call Forward Settings section 160
PSTN-To-VoIP Speed Dial Settings section 161
PSTN Ring Thru Line 1 Distinctive Ring Settings section 161
PSTN Ring Thru Line 1 Ring Settings section 161
Appendix C: Provisioning Reference (WRP400) . . . . . . . . . . . 162
Appendix D: Troubleshooting . . . . . . . . . . . . . . . . . . . 171
Appendix E: Environmental Specifications . . . . . . . . . . . . . 174
PAP2T 174
SPA2102 174
SPA3102 175
SPA8000 175
RTP300 176
WRP400 176
WRTP54G 177
AG310 177
Appendix F: Warranty Information . . . . . . . . . . . . . . . . . 178
Limited Warranty 178
Exclusions and Limitations 178
Obtaining Warranty Service 179
Technical Support 179
Appendix G: Regulatory Information . . . . . . . . . . . . . . . . 180
Federal Communications Commission Interference Statement 180
Industry Canada Statement 180
Règlement d’Industry Canada 180
EC Declaration of Conformity (Europe) 181
User Information for Consumer Products Covered by EU Directive 2002/96/EC on Waste
Electric and Electronic Equipment (WEEE) 181
Appendix H: Safety Information . . . . . . . . . . . . . . . . . . 188
Meaning of the Warning Symbol 188
General Safety Information 188
Power Safety Information 189
Appendix I: Software License Agreement . . . . . . . . . . . . . 190
Software in Linksys Products: 190
Software Licenses: 190
Schedule 1 Linksys Software License Agreement 190
Schedule 2 192

Table of Contents
Linksys ATA Administration Guide vi
Schedule 3 197
Appendix J: Contacts . . . . . . . . . . . . . . . . . . . . . . . 200

Linksys ATA Administration Guide vii
Document Audience
Preface
The Linksys ATA Administration Guide is intended to help VARs and Service Providers to manage
and configure the Linksys Voice System (LVS). This preface provides helpful information about
this guide and other resources that are available to you. Before you begin to use this guide,
refer to the following topics:
•”Document Audience,” on page vii
•”Document Conventions,” on page viii
•”Document Purpose and Contents,” on page ix
•”Related Documentation,” on page x
•”Online Resources,” on page xi
•”Copyright and Trademarks,” on page xi
•”Finding Information in PDF Files,” on page xii
Document Audience
This document is written for the following audience:
• Service providers offering services using LVS products
• VARs and resellers who need LVS configuration references
• System administrators or anyone who performs LVS installation and administration
NOTE: This guide does not provide the
configuration information required by
specific service providers. Please consult
with the service provider for specific
service parameters.

Linksys ATA Administration Guide viii
Supported Firmware
Supported Firmware
This guide supports the following firmware releases. The installed firmware must be at least the
indicated in the table below.
Document Conventions
The following are the typographic conventions used in this document.
Product Firmware Version
PAP2T 5.1.6
SPA2102 5.2.5
SPA3102 5.1.7
SPA8000 6.1.3
RTP300 3.1.24
WRP400 1.00.06
WAG54GP2 Model Version 1: 1.01.02
Model Version 2: 2.01.06
AG310 1.00.04
Typographic Element Meaning
Boldface May indicate either of the following:
• A user interface element that you need to click, select, or otherwise act
on
• A literal value to be entered in a field.
Italic May indicate either of the following:
• A variable that should be replaced with a literal value.
• The name of a page, section, or field in the user interface
Monospaced Font Indicates code samples or system output.

Linksys ATA Administration Guide ix
Document Purpose and Contents
Document Purpose and Contents
This document provides information that an administrator needs to configure the Linksys Voice
System, which typically consists of a SPA9000 IP PBX, one or more SPA900 Series IP phones, and
the optional SPA400 PSTN gateway and voice mail server. This guide focuses primarily on the
tasks that an administrator performs to configure a SPA9000 with the SPA9000 administration
web server.
NOTE: This guide does not cover initial installation and configuration, SPA900 Series phone
configuration, the Setup Wizard, or provisioning. See ”Related Documentation,” on page x.
The information in this guide is organized into the following chapters and appendices:
Chapter Contents
Chapter 1, "Introducing
Linksys Analog Telephone
Adapters"
This chapter introduces the functionality of the Linksys ATA
devices and describes the features that are available.
Chapter 2, "Basic
Administration and
Configuration of Your Linksys
ATA Device"
This chapter describes the equipment and services that are
required to install your ATA device and explains how to
complete the basic administration and configuration tasks.
Chapter 3, "Configuring Your
System for ITSP
Interoperability"
This chapter provides configuration details for the purpose of
helping you to ensure that your infrastructure properly
supports voice services.
Chapter 4, "Configuring Voice
Services"
This chapter describes how to configure your ATA device to
meet the customer’s requirements for voice services.
Chapter 5, "Configuring Music
on Hold"
This chapter explains how to configure Music on Hold using
either a music file or streaming audio.
Chapter 6, "Configuring the
PSTN (FXO) Gateway"
This chapter describes how to configure the Linksys SPA3102
and AG310 devices to provide PSTN connectivity.
Appendix A, "Linksys ATA
Routing Field Reference"
This chapter describes the settings that you can configure
under the Router and Network tabs in the administration web
server pages.
Appendix B, "Linksys ATA
Voice Field Reference"
This chapter describes the settings that you can configure
under the Voice tab in the administration web server pages.
Appendix C, "Provisioning
Reference (WRP400)"
The WRP400 can be provisioned remotely. This chapter
provides information about the parameters that can be
provisioned from an XML profile by using the Linksys profile
compiler tool (SPC).
Appendix D,
"Troubleshooting"
This appendix provides solutions to problems that may occur
during the installation and operation of the Linksys ATA
devices.
Appendix E, "Environmental
Specifications"
These appendices provide additional product information.
Appendix F, "Warranty
Information"

Linksys ATA Administration Guide x
Related Documentation
Related Documentation
Refer to the following documentation to provide additional information about features and
functionality of Linksys ATAs:
• Your Linksys ATA Quick Installation Guide
• Your Linksys ATA User Guide
• SPA Provisioning Guide
The Linksys ATA Administration Guide is part of a complete suite of documentation that is
available to assist you in using and configuring Linksys devices. The following documents are of
special interest to Linksys Voice System administrators.
NOTE: These documents and more are available at Linksys.com.
Appendix I, "Software License
Agreement"
Appendix H, "Safety
Information"
Appendix J, "Contacts"
Document Title Description Intended Audience
Linksys Phone Administration
Guide
• Configuration and
management of IP phones
• Deployment options with or
without the SPA9000 IP PBX
• SPA9x2 series IP phones
VARs and Service Providers
Linksys SPA9x2 Phone User
Guide
• Phone setup
• Phone features
• SPA9x2 series IP phones
VARS and phone end-users
Linksys Voice System
Installation and
Configuration Guide
•Networkdesign
considerations and site
preparation
• Switch configuration
• Initial installation and
configuration of the LVS
components: SPA9000,
SPA400, SPA900 series IP
phones.
VARs and Service Providers

Linksys ATA Administration Guide xi
Online Resources
Online Resources
Website addresses in this document are listed without http:// in front of the address because
most current web browsers do not require it. If you use an older web browser, you may have to
add http:// in front of the web address.
Copyright and Trademarks
Technical Support
A list of technical support phone numbers and web sites is available in Appendix J, "Contacts."
Linksys Voice System
Administration Guide
• Administration and
configuration of system
features using the SPA9000
and SPA400
• Deployment options for ITSP,
PSTN, and ISDN services
• SPA9000, SPA400, SPA900
series phones
VARs and Service Providers
Linksys Provisioning Guide • Provisioning LVS components Service Providers only
Resource Link
Linksys www.linksys.com
Linksys International www.linksys.com/international
Glossary www.linksys.com/glossary
Network Security www.linksys.com/security
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.
Adobe, Acrobat, and Flash are either registered
trademarks or trademarks of Adobe Systems
Incorporated in the United States and/or other
countries. Other brands and product names are
trademarks or registered trademarks of their
respective holders.
Other brands and product names are trademarks
or registered trademarks of their respective
holders.
Document Title Description Intended Audience

Linksys ATA Administration Guide xii
Finding Information in PDF Files
Finding Information in PDF Files
Linksys documents are published as PDF files. The PDF Find/Search tool within Adobe® Reader®
lets you find information quickly and easily online. You can:
• Search an individual PDF.
• Search multiple PDFs at once (for example, all PDFs in a specific folder or disk drive).
• Perform advanced searches.
Finding Text in a PDF
1. Enter your search terms in the Find box on the toolbar.
NOTE: By default, the Find tool is available at the right end of the Acrobat toolbar. If the Find
tool does not appear, choose Edit > Find.
2. Optionally, click the arrow next to the Find text box to refine your search by choosing
special options such as Whole words only.
3. Press Enter. Acrobat displays the first instance of the search term. Press Enter again to
continue to more instances of the term.
Finding Text in Multiple PDF Files
The Search window lets you search for terms in multiple PDF files that are stored on your PC or
local network. The PDF files do not need to be open.
1. Start Acrobat Professional or Adobe Reader.
2. Choose Edit > Search, or click the arrow next to the Find box and then choose Open Full
Acrobat Search.
3. In the Search window, complete the following steps:
a. Enter the text that you want to find.
b. Choose All PDF Documents in.
c. From the drop-down box, choose Browse for Location. Then choose the location on
your computer or local network, and click OK.

Linksys ATA Administration Guide xiii
Finding Information in PDF Files
d. If you want to specify additional search criteria, click Use Advanced Search Options,
and choose the options you want.
e. Click Search.
4. When the Results appear, click + to open a folder, and then click any link to open the file
where the search terms appear.
NOTE: For more information about the Find and Search functions, see the Adobe Acrobat
online help.

Linksys ATA Administration Guide 15
1Introducing Linksys Analog Telephone Adapters
Introducing Linksys Analog Telephone
Adapters
This guide describes the administration and use of Linksys analog telephone adapters (ATAs).
Linksys ATA devices are a key element in the end-to-end IP Telephony solution. A Linksys ATA
device provides user access to Internet phone services through one or more standard
telephone RJ-11 phone ports using standard analog telephone equipment. The Linksys ATA
device connects to a wide area IP network, such as the Internet, through a broadband (DSL or
cable) modem or router.
This chapter introduces the functionality of the Linksys ATA devices and describes the features
that are available.
Refer to the following topics:
•”Comparison of ATA Devices” section on page 16
•”Linksys ATA Connectivity Requirements” section on page 18
•”ATA Software Features” section on page 22
Linksys ATA
Telephone/fax Ethernet
Broadband CPE
(DSL, cable,
fixed wireless)
Broadband
SIP proxy
Layer 3
IP infrastructure PSTN
Voice
gateway
187254
V
V
V

Linksys ATA Administration Guide 16
Comparison of ATA Devices
Introducing Linksys Analog Telephone Adapters
Comparison of ATA Devices
Each Linksys ATA device is an intelligent low-density Voice over IP (VoIP) gateway that enables
carrier-class residential and business IP Telephony services delivered over broadband or high-
speed Internet connections. A Linksys ATA device maintains the state of each call it terminates
and makes the proper reaction to user input events (such as on/off hook or hook flash). The
Linksys ATA devices use the Session Initiation Protocol (SIP) open standard so there is little or no
involvement by a “middle-man” server or media gateway controller. SIP allows interoperation
with all ITSPs that support SIP.
The following table summarizes the ports and features provided by the Linksys ATA devices
described in this document.
NOTE: The information contained in this guide is not a warranty from Linksys, a division of
Cisco Systems, Inc. Customers planning to use Linksys ATA devices in a VoIP service deployment
are advised to test all functionality they plan to support before putting the Linksys ATA device
in service. By implementing Linksys ATA devices with the SIP protocol, intelligent endpoints at
the edges of a network perform the bulk of the call processing. This allows the deployment of a
large network with thousands of subscribers without complicated, expensive servers.
Product
Name
FXS
(Analog
Phone)
FXO
PSTN
Connect-
ion
RJ-45
Internet
(WAN)
RJ-45
Ethernet
(LAN)
Configurable
Voice Lines
Description
PAP2T 2—1— 2 Voiceadapterwithtwo
FXS ports.
SPA2102 2—11 2 Voiceadapterwith
router.
SPA3102 1111 1 Voiceadapterwith
router and PSTN
connectivity.
SPA8000 8 — 1 Maintenance
only
8Voiceadapterwith
support for up to eight
FXS devices. Supports
SIP Trunking for inbound
call routing to trunk
groups.
RTP300 2 — 1 4 2 IP router with two FXS
ports. Provides ATA
device functionality.
WRP400 2 — 1 4 2 Wireless-G IP router with
two FXS ports. Provides
ATA device functionality.
Can be remotely
provisioned.
WRTP54G
WAG54GP2
2 — 1 4 2 Wireless-G IP router with
two FXS ports. Provides
ATA device functionality.
AG310 1 1 1 1 1 ADSL2+ gateway with
VoIP and PSTN
connectivity. Provides
ATA device functionality.

Linksys ATA Administration Guide 17
Comparison of ATA Devices
Introducing Linksys Analog Telephone Adapters
Figure 1 illustrates how the different Linksys ATA devices provide voice connectivity in a VoIP
network.
Figure 1: How Linksys ATAs Provide Voice Connectivity
Notes on Figure 1:
• The AG310, SPA3102, SPA8000, and WAG54GP2 act as SIP-PSTN gateways. They provide
PSTN connectivity in addition to a single FXS port. In addition, the AG310 and WAG54GP2
provide an ADSL2+ gateway.
• The WRP400, RTP300, and WRTP54G routers provide ports for analog telephone devices
and provide QoS in the form of priority packet queueing.
SPA3102
Broadband
router
Broadband
router
SPA8000,
PAP2T
DSL/cable
modem WAG54GP2,
AG310
WRP400, RTP300,
WRTP54G, and
SPA2102
Ethernet/Wireless
LAN
Fax (up to 4
SPA8000)
Analog phone
(up to 8 with
SPA8000)
PSTN
Ethernet/Wired
LAN
Internet
187255
PSTN
Ethernet/Wireless
LAN

Linksys ATA Administration Guide 18
Linksys ATA Connectivity Requirements
Introducing Linksys Analog Telephone Adapters
Linksys ATA Connectivity Requirements
A Linksys ATA device can be connected to a local router, or directly to the Internet. Each phone
connected to an RJ-11 (analog) port on the Linksys ATA device connects to other devices
through SIP, which is transmitted over the IP network.
In order to ensure connectivity between the devices connected to its FXS ports, the Linksys ATA
device requires the following functionality to be supplied on the network connected to its
Ethernet port:
• Connection to an IP router with hairpinning support
• Connection to an outbound Proxy server
When a phone connected to the Linksys ATA device communicates with another phone, it
sends a SIP packet onto the internal LAN. The packet is then forwarded to the external LAN or
directly to the Internet. The source address and source port on the original packet are assigned
by the Linksys ATA device DHCP server. The address and port are translated by the Linksys ATA
device using Network Address Translation (NAT) and Port Address Translation (PAT). The packet
is then routed back to the internal network on the Linksys ATA device by the local router or the
ISP router.
Problems can occur with calls between phones connected to the Linksys ATA device when an
outbound proxy or a router with hairpinning support is not available. The Linksys ATA device
cannot directly connect the two telephone devices, but requires a local or remote router to
route the packet back to its destination on the local network from which it originated.
The necessary routing can be provided by a router with hairpinning support, or by an
outbound SIP proxy, which is typically provided by the Internet Telephony Service Provider
(ITSP). When relying on the ITSP for interconnecting phones on the Linksys ATA device, local
phones connected to the Linksys ATA device are unable to communicate with each other if the
Internet connection is not available for any reason. It is recommended you connect the Linksys
ATA device to a local router that provides hairpinning support to prevent this problem.
Linksys PAP2T Connectivity
As shown in the following figure, the PAP2T has two FXS ports (voice lines 1 and 2).
Line 1
Line 2 Internet
IP Router (with
hairpinning) or
Broadband modem
ITSP
ISP
PAP2T
LAN WAN
Ethernet
port
Administrative
IVR (Line 1 or
Line 2)
IP
IP
187420

Linksys ATA Administration Guide 19
Linksys ATA Connectivity Requirements
Introducing Linksys Analog Telephone Adapters
Notes:
• The IVR functions are accessed by connecting an analog telephone to Line 1.
• For proper operation, the service provider should use an Outbound Proxy to forward all
voice traffic when the PAP2T is located behind a router. If necessary, explicit port ranges can
be specified for SIP and RTP.
Linksys SPA2102 Connectivity
As shown in the following illustration, the SPA2102 has two FXS ports (voice lines 1 and 2).
By default, the device attached to the LAN port is assigned the network address 192.168.0.0
with a subnet mask of 255.255.255.0. If there is a network address conflict with a device on the
Ethernet port, the network address of the device on the LAN port is automatically changed to
192.168.1.0.
Notes:
• The IVR functions are accessed by connecting an analog telephone to Line 1.
• For proper operation, the service provider should use an Outbound Proxy to forward all
voice traffic when the SPA2102 is located behind a router. If necessary, explicit port ranges
can be specified for SIP and RTP.
Line 1
Line 2 Internet
IP Router (with
hairpinning) or
Broadband modem
ITSP
ISP
SPA2102
LAN WAN
Ethernet
port
LAN
port
Administrative
IVR (Line 1 or
Line 2)
IP
IP
Administration
PC
187257

Linksys ATA Administration Guide 20
Linksys ATA Connectivity Requirements
Introducing Linksys Analog Telephone Adapters
Linksys SPA3102 Connectivity
As shown in the following figure, the SPA3102 has one FXS port (voice line 1).
By default, the device on the LAN port is assigned the network address 192.168.0.0 with a
subnet mask of 255.255.255.0. If there is a network address conflict with a device on the
Ethernet port, the network address of the device on the LAN port is automatically changed to
192.168.1.0.
Notes:
• The IVR functions are accessed by connecting an analog telephone to Line 1.
• For proper operation, the service provider should use an Outbound Proxy to forward all
voice traffic when the SPA3102 is located behind a router. If necessary, explicit port ranges
can be specified for SIP and RTP.
Line 1
PSTN
Line 1
Internet
IP Router (with
hairpinning) or
Broadband modem
ITSP
ISP
SPA3102
Ethernet
port
LAN
port
LAN WAN
Administrative
IVR (Line 1 or
Line 2)
IP
IP
Administration
PC
187259
PSTN