THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL
STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT
WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS.
THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT
SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE
OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.
The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required
to correct the interference at their own expense.
The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not
installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. 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. These specifications are designed to provide reasonable
protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.
Modifying the equipment without Cisco’s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital
devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television
communications at your own expense.
You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its
peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:
• Turn the television or radio antenna until the interference stops.
• Move the equipment to one side or the other of the television or radio, or farther away from the television or radio.
• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits
controlled by different circuit breakers or fuses.)
Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.
The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public
domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California.
NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH
ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT
LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF
DEALING, USAGE, OR TRADE PRACTICE.
IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING,
WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO
OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at
www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership
relationship between Cisco and any other company. (1005R)
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP
© 2010 Cisco Systems, Inc. All rights reserved.
The Java logo is a trademark or registered trademark of Sun Microsystems, Inc. in the U.S. or other countries.
Contents
iii
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
CONTENTS
Preface vii
Cisco ATA 187 Analog Telephone Adaptor Overview 1-1
Session Initiation Protocol Overview 1-2
SIP Capabilities 1-2
Components of SIP 1-3
SIP Clients 1-4
SIP Servers 1-4
Hardware Overview 1-5
Software Features 1-5
Secure Real-Time Transport Protocol 1-6
Name Signaling Event based passthrough 1-6
Transport Layer Security Protocol 1-6
T.38 Fax Relay 1-6
Voice Codecs Supported 1-6
Other Supported Protocols 1-6
ATA 187 SIP Services 1-7
Modem Standards 1-7
Fax Services 1-8
Methods Supported 1-8
Supplementary Services 1-9
Installation and Configuration Overview 1-9
Preparing to Install the ATA 187 on Your Network 2-1
Understanding Interactions with Other Cisco Unified IP Communications Products 2-1
Understanding How the ATA 187 Interacts with Cisco Unified Communications Manager 2-2
Providing Power to the ATA 187 2-2
Power Guidelines 2-2
Power Outage 2-2
Understanding Phone Configuration Files 2-3
Understanding the ATA 187 Startup Process 2-4
Adding the ATA 187 to the Cisco Unified Communications Manager Database 2-5
Adding the ATA 187 with Auto-Registration 2-6
Adding the ATA 187 with Cisco Unified Communications Manager Administration 2-6
Determining the MAC Address of an ATA 187 2-7
Contents
iv
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Installing the ATA 187 3-1
Network Requirements 3-1
Safety Recommendations 3-2
What the ATA 187 Package Includes 3-2
Installing the ATA 187 3-3
Attaching a Phone to the ATA 187 3-3
Verifying the ATA 187 Startup Process 3-3
Configuring Startup Network Settings 3-4
Configuring Security on the ATA 187 3-4
Configuring the ATA 187 4-1
Telephony Features Available for the ATA 187 4-1
Configuring Product Specific Configuration Parameters 4-5
Adding Users to Cisco Unified Communications Manager 4-6
Configuring Fax Services 5-1
Using Fax Mode 5-1
Fax Modem Standards 5-1
Fax Modem Speeds 5-2
Troubleshooting and Maintenance 6-1
Resolving Startup Problems 6-1
Symptom: The ATA 187 Does Not Go Through its Normal Startup Process 6-1
Symptom: The ATA 187 Does Not Register with Cisco Unified Communications Manager 6-2
Checking Network Connectivity 6-2
Verifying TFTP Server Settings 6-2
Verifying DNS Settings 6-3
Verifying Cisco Unified Communications Manager Settings 6-3
Cisco Unified Communications Manager and TFTP Services Are Not Running 6-3
Creating a New Configuration File 6-3
Registering the Phone with Cisco Unified Communications Manager 6-4
Symptom: ATA 187 Unable to Obtain IP Address 6-4
ATA 187 Resets Unexpectedly 6-5
Verifying Physical Connection 6-5
Identifying Intermittent Network Outages 6-5
Verifying DHCP Settings 6-5
Contents
v
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Checking Static IP Address Settings 6-6
Verifying Voice VLAN Configuration 6-6
Eliminating DNS or Other Connectivity Errors 6-6
Checking Power Connection 6-7
Troubleshooting ATA 187 Security 6-7
General Troubleshooting Tips 6-7
Where to Go for More Troubleshooting Information 6-9
Cleaning the ATA 187 6-10
Using SIP Supplementary Services 7-1
Common Supplementary Services 7-1
Attended Transfer 7-2
Call Pickup 7-2
Caller ID 7-2
Call-Waiting Caller ID 7-2
Call Hold 7-2
Group Call Pickup 7-3
Meet–Me Conference 7-3
Privacy 7-3
Shared Line 7-3
Speed Dial 7-4
Redial 7-4
Unattended Transfer 7-4
Semi-unattended Transfer 7-4
Fully Unattended Transfer 7-5
Voice Mail Indication 7-5
Voice-Messaging System 7-5
Making a Conference Call in the United States 7-5
Making a Conference Call in Sweden 7-6
Call Waiting in the United States 7-6
Call Waiting in Sweden 7-6
About Call Forwarding 7-6
Call Forwarding in the United States 7-7
Call Forwarding in Sweden 7-7
Voice Menu Codes 8-1
Accessing the IVR and Configuring Your Phone Setting 8-1
Contents
vi
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
ATA 187 Specifications A-1
Physical Specifications A-1
Electrical Specifications A-2
Environmental Specifications A-2
Physical Interfaces A-2
Ringing Characteristics A-3
Software Specifications A-3
SIP Compliance Reference Information A-4
Recommended ATA 187 Tone Parameter Values by Country B-1
G
LOSSARY
I
NDEX
vii
Cisco Analog Telephone Adapter 187 Administration Guide for SIP 1.0
OL-21862-01
Preface
Overview
The Cisco Analog Telephone Adapter 187 Administration Guide for SIP (Version 1.0) provides the
information you need to install, configure, and manage the Cisco ATA 187 Analog Telephone Adapter
(ATA 187) on a Session Initiation Protocol (SIP) network.
Audience
This guide is intended for service providers and network administrators who administer Voice over IP
(VoIP) services using the ATA 187. Most of the tasks described in this guide are not intended for end
users of the ATA 187. Many of these tasks impact the ability of the ATA 187 to function on the network,
and require an understanding of IP networking and telephony concepts.
Organization
This manual is organized as follows:
Chapter 1, “Cisco ATA 187 Analog Telephone
Adapter Overview”
Provides descriptions of hardware and
software features of the ATA 187 along with a
brief overview of the Session Initiation
Protocol (SIP).
Chapter 2, “Preparing to Install the ATA 187
on Your Network”
Provides information on the interactions
between the ATA
187, Cisco Unified
Communications Manager and other devices.
It also describes options for powering the ATA
187.
Chapter 3, “Installing the ATA 187” Provides information on how to connect the
ATA 187 hardware and load the QED and
firmware files.
Chapter 4, “Configuring the ATA 187 for SIP Provides information on how to configure the
ATA 187 to operate with Session Initiation
Protocol (SIP).
viii
Cisco Analog Telephone Adapter 187 Administration Guide for SIP 1.0
OL-21862-01
Preface
Related Documentation
For more information about the ATA 187 or Cisco Unified Communications Manager, refer to the
following publications:
Cisco ATA 187 Analog Telephone Adapter
• RFC 3261 (SIP: Session Initiation Protocol)
• RFC 2543 (SIP: Session Initiation Protocol)
• Cisco ATA SIP Compliance Reference Information
http://www-vnt.cisco.com/SPUniv/SIP/documents/CiscoATASIPComplianceRef.pdf
• RFC 768 (User Datagram Protocol)
• RFC 2198 (RTP Payload for Redundant Audio Data)
• RFC 2833 (RTP Payload for DTMF Digits, Telephony Phones and Telephony Signals)
• RFC 2327 (SDP: Session Description Protocol)
• RFC 4730 (A Session Initiation Protocol (SIP) Event Package for Key Press Stimulus (KPML))
• RFC 3515 (The Session Initiation Protocol (SIP) Refer Method)
• Read Me First - ATA Boot Load Information
• Cisco ATA 187 Analog Telephone Adapter At a Glance
• Regulatory Compliance and Safety Information for the Cisco ATA 187
• Cisco ATA 187 Analog Telephone Adaptor Release Notes
Cisco Unified Communications Manager
These publications are available at the following URL:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/tsd_products_support_series_home.html
Chapter 5, “Configuring and Debugging Fax
Services”
Provides instructions for configuring both
ports of the ATA
187 to support fax
transmission.
Chapter 6, “Troubleshooting and
Maintenance”
Provides basic testing and troubleshooting
procedures for the ATA 187.
Chapter 7, “Using SIP Supplementary
Services”
Provides end-user information about pre-call
and mid-call services.
Chapter 8, “Voice Menu Codes” Provides a quick-reference list of the voice
configuration menu options for the ATA 187.
Appendix A, “ATA 187 Specifications” Provides physical specifications for the ATA
187.
Appendix B, “SIP Call Flows” Provides ATA 187 call flows for SIP scenarios.
Appendix C, “Recommended ATA 187 Tone
Parameter Values by Country”
Provides tone parameters for various
countries.
Glossary Provides definitions of commonly used terms.
Index Provides reference information.
ix
Cisco Analog Telephone Adapter 187 Administration Guide for SIP 1.0
OL-21862-01
Preface
Cisco Unified Communications Manager Business Edition
These publications are available at the following URL:
http://www.cisco.com/en/US/products/ps7273/tsd_products_support_series_home.html
Obtaining Documentation, Obtaining Support, and Security
Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback,
security guidelines, and also recommended aliases and general Cisco documents, see the monthly What’s
New in Cisco Product Documentation, which also lists all new and revised Cisco technical
documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Cisco Product Security Overview
This product contains cryptographic features and is subject to United States and local country laws
governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption. Importers, exporters, distributors
and users are responsible for compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local
laws, return this product immediately.
Further information regarding U.S. export regulations may be found at
http://www.access.gpo.gov/bis/ear/ear_data.html.
Document Conventions
This document uses the following conventions:
Convention Description
boldface font Commands and keywords are in boldface.
italic font Arguments for which you supply values are in italics.
[ ] Elements in square brackets are optional.
{ x | y | z } Alternative keywords are grouped in braces and separated by vertical bars.
[ x | y | z ] Optional alternative keywords are grouped in brackets and separated by vertical bars.
string A nonquoted set of characters. Do not use quotation marks around the string or the
string will include the quotation marks.
screen font Terminal sessions and information the system displays are in screen font.
boldface
screen
font
Information you must enter is in boldface screen font.
italic screen
font
Arguments for which you supply values are in italic screen font.
x
Cisco Analog Telephone Adapter 187 Administration Guide for SIP 1.0
OL-21862-01
Preface
Note Means reader take note. Notes contain helpful suggestions or references to material not covered in the
publication.
Caution Means reader be careful. In this situation, you might do something that could result in equipment
damage or loss of data.
Warning
Means danger. You are in a situation that could cause bodily injury. Before you work on any
equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard
practices for preventing accidents.
^ The symbol ^ represents the key labeled Control—for example, the key combination
^D in a screen display means hold down the Control key while you press the D key.
< > Nonprinting characters, such as passwords are in angle brackets.
Convention Description
CHAPTER
1-1
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
1
Cisco ATA 187 Analog Telephone Adaptor
Overview
This section describes the hardware and software features of the Cisco ATA 187 Analog Telephone
Adaptor (ATA 187) and includes a brief overview of the Session Initiation Protocol (SIP).
The ATA 187 analog telephone adaptors are handset-to-Ethernet adaptors that allow regular analog
phones to operate on IP-based telephony networks. The ATA 187 support two voice ports, each with an
independent phone number. The ATA 187 also has an RJ-45 10/100BASE-T data port.
This section covers these topics:
• Session Initiation Protocol Overview, page 1-2
• Hardware Overview, page 1-5
• Software Features, page 1-5
• Installation and Configuration Overview, page 1-9
Figure 1-1 Cisco Analog Telephone Adaptor
197044
1-2
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Session Initiation Protocol Overview
The ATA187, which operates with Cisco voice-packet gateways, makes use of broadband pipes that are
deployed through a digital subscriber line (DSL), fixed wireless-cable modem, and other Ethernet
connections.
Figure 1-2 ATA 187 as Endpoint in SIP Network
Session Initiation Protocol Overview
Session Initiation Protocol (SIP) is the Internet Engineering Task Force (IETF) standard for real-time
calls and conferencing over Internet Protocol (IP). SIP is an ASCII-based, application-layer control
protocol (defined in RFC3261) that can be used to establish, maintain, and terminate multimedia
sessions or calls between two or more endpoints.
Like other Voice over IP (VoIP) protocols, SIP is designed to address the functions of signaling and
session management within a packet telephony network. Signaling allows call information to be carried
across network boundaries. Session management provides the ability to control the attributes of an
end-to-end call.
Note SIP for the ATA 187 is compliant with RFC2543.
This section contains these topics:
• SIP Capabilities, page 1-2
• Components of SIP, page 1-3
SIP Capabilities
SIP provides these capabilities:
• Determines the availability of the target endpoint. If a call cannot be completed because the target
endpoint is unavailable, SIP determines whether the called party is already on the phone or did not
answer in the allotted number of rings. SIP then returns a message indicating why the target endpoint
was unavailable.
• Determines the location of the target endpoint. SIP supports address resolution, name mapping, and
call redirection.
V
Cisco ATA 187
Telephone/fax
Ethernet
Broadband CPE
(DSL, cable,
fixed wireless)
Broadband
SIP proxy
Layer 3
IP infrastructure
PSTN
Voice
gateway
197596
V
1-3
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Session Initiation Protocol Overview
• Determines the media capabilities of the target endpoint. Using the Session Description Protocol
(SDP), SIP determines the lowest level of common services between endpoints. Conferences are
established using only the media capabilities that are supported by all endpoints.
• Establishes a session between the originating and target endpoint. If the call can be completed, SIP
establishes a session between the endpoints. SIP also supports mid-call changes, such as adding
another endpoint to the conference or changing the media characteristic or codec.
• Handles the transfer and termination of calls. SIP supports the transfer of calls from one endpoint
to another. During a call transfer, SIP establishes a session between the transferee and a new
endpoint (specified by the transferring party) and terminates the session between the transferee and
the transferring party. At the end of a call, SIP terminates the sessions between all parties.
Conferences can consist of two or more users and can be established using multicast or multiple
unicast sessions.
Components of SIP
SIP is a peer-to-peer protocol. The peers in a session are called User Agents (UAs). A user agent can
function in one of these roles:
• User agent client (UAC)—A client application that initiates the SIP request.
• User agent server (UAS)—A server application that contacts the user when a SIP request is received
and returns a response on behalf of the user.
Typically, a SIP endpoint is capable of functioning as both a UAC and a UAS, but functions only as one
or the other per transaction. Whether the endpoint functions as a UAC or a UAS depends on the UA that
initiated the request.
From an architectural standpoint, the physical components of a SIP network can also be grouped into
two categories—Clients and servers.
Figure 1-3 illustrates the architecture of a SIP network.
Note SIP servers can interact with other application services, such as Lightweight Directory Access Protocol
(LDAP) servers, a database application, or an extensible markup language (XML) application. These
application services provide back-end services such as directory, authentication, and billable services.
1-4
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Session Initiation Protocol Overview
Figure 1-3 SIP Architecture
SIP Clients
SIP clients include:
• Gateways—Provide call control. Gateways provide many services, the most common being a
translation function between SIP conferencing endpoints and other terminal types. This function
includes translation between transmission formats and between communications procedures. In
addition, the gateway also translates between audio and video codecs and performs call setup and
clearing on both the LAN side and the switched-circuit network side.
• Phones—Can act as either a UAS or UAC. The ATA 187 can initiate SIP requests and respond to
requests.
SIP Servers
SIP servers include:
• Proxy server—The proxy server is an intermediate device that receives SIP requests from a client
and then forwards the requests on the client’s behalf. Proxy servers receive SIP messages and
forward them to the next SIP server in the network. Proxy servers can provide functions such as
authentication, authorization, network access control, routing, reliable request retransmission, and
security.
• Redirect server—Receives SIP requests, strips out the address in the request, checks its address
tables for any other addresses that may be mapped to the address in the request, and then returns the
results of the address mapping to the client. Redirect servers provide the client with information
about the next hop or hops that a message should take, then the client contacts the next hop server
or UAS directly.
• Registrar server—Processes requests from UACs for registration of their current location. Registrar
servers are often co-located with a redirect or proxy server.
SIP user agents
RTP
SIP
SIP proxy and
redirect servers
SIP gateway
PSTN
Legacy PBX
SIP SIP
72342
1-5
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Hardware Overview
Hardware Overview
The ATA 187 is a compact, easy to install device. Figure 1-4 shows the rear panel of the ATA 187.
Figure 1-4 ATA 187—Rear View
The unit provides these connectors and indicators:
• 12Vb power connector.
• Two RJ-11 FXS (Foreign Exchange Station) ports—The ATA 187 supports two independent RJ-11
phone ports that can connect to any standard analog phone device. Each port supports either voice
calls or fax sessions, and both ports can be used simultaneously.
• The ATA 187 has one network port—an RJ-45 10/100BASE-T data port to connect an
Ethernet-capable device, such as a computer, to the network.
Note The ATA 187 performs auto-negotiation for duplexity and speed and is capable of 10/100 Mbps,
full-duplex operation.
Software Features
The ATA 187 supports these protocols, services and methods:
• Secure Real-Time Transport Protocol, page 1-6
• Name Signaling Event based passthrough, page 1-6
• Transport Layer Security Protocol, page 1-6
• T.38 Fax Relay, page 1-6
• Voice Codecs Supported, page 1-6
• Other Supported Protocols, page 1-6
• ATA 187 SIP Services, page 1-7
• Modem Standards, page 1-7
• Fax Services, page 1-8
• Methods Supported, page 1-8
• Supplementary Services, page 1-9
LINE 1 LINE 2 NETWORK
POWER
197044
12VDC 1A
1-6
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Software Features
Secure Real-Time Transport Protocol
Secure Real-Time Transport Protocol secures voice conversations on the network and provides
protection against replay attacks.
Name Signaling Event based passthrough
Name Signaling Event (NSE)-based passthrough is simply thet transport of fax or modem
communications using the G.711 codec.
The ATA 187 does not support NSE-based modem passthrough.
Transport Layer Security Protocol
Transport Layer Security (TLS) is a cryptographic protocol that secures data communications such as
e-mail on the Internet. TLS is functionally equivalent to Secure Sockets Layer (SSL).
T.38 Fax Relay
The T.38 fax relay feature enables devices to use fax machines to send files over the IP network. In
general, when a fax is received, it is converted to an image, sent to the T.38 fax device, and converted
back to an analog fax signal. T.38 fax relays configured with voice gateways decode or demodulate the
fax signals before they are transported over IP. With the SIP call control protocol, the T.38 fax relay is
indicated by Security Description (SDP) entries in the initial SIP INVITE message. After the initial SIP
INVITE message, the call is established to switch from voice mode to T.38 mode. Cisco Unified
Communications Administration allows you to configure a SIP profile that supports T.38 fax
communication.
Voice Codecs Supported
The ATA 187 supports these voice codecs (check your other network devices for the codecs they
support):
• G.711µ-law
• G.711A-law
• G.729A
• G.729B
• G.729AB
Other Supported Protocols
The ATA 187 supports these additional protocols:
• 802.1Q VLAN tagging
• Cisco Discovery Protocol (CDP)
1-7
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Software Features
• Domain Name System (DNS)
• Dynamic Host Configuration Protocol (DHCP)
• Internet Control Message Protocol (ICMP)
• Internet Protocol (IP)
• Real-Time Transport Protocol (RTP)
• Transmission Control Protocol (TCP)
• Trivial File Transfer Protocol (TFTP)
• User Datagram Protocol (UDP)
ATA 187 SIP Services
These services include these features:
• IP address assignment—DHCP-provided or statically configured
• ATA 187 configuration by Cisco Unified Communications Manager configuration interface
• VLAN configuration
• Cisco Discovery Protocol (CDP)
• Low-bit-rate codec selection
• User authentication
• Configurable tones (dial tone, busy tone, alert tone, reorder tone, call waiting tone)
• Dial plans
• SIP proxy server redundancy
• Privacy features
• User-configurable, call waiting, permanent default setting
• Comfort noise during silent period when using G.711
• Advanced audio mode
• Caller ID format
• Ring cadence format
• Silence suppression
• Hookflash detection timing configuration
• Configurable onhook delay
• Type of Service (ToS) configuration for audio and signaling ethernet packets
• Debugging and diagnostic tools
Modem Standards
The ATA 187 supports the following modem standards:
• V. 9 0
• V. 9 2
1-8
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Software Features
• V. 4 4
• K56Flex
• ITU-T V.34 Annex 12
• ITU-T V.34
• V.32bis
• V. 3 2
• V. 2 1
• V. 2 2
• V. 2 3
Fax Services
The ATA 187 supports two modes of fax services, in which fax signals are transmitted using the G.711
codec:
• Fax pass-through mode—Receiver-side Called Station Identification (CED) tone detection with
automatic G.711A-law or G.711µ-law switching.
• T.38 Fax Relay mode: The T.38 fax relay feature enables devices to use fax machines to send files
over the IP network. In general, when a fax is received, it is converted to an image, sent to the T.38
fax device, and converted back to an analog fax signal. T.38 fax relays configured with voice
gateways decode or demodulate the fax signals before they are transported over IP.
Note Success of fax transmission depends on network conditions and fax modem response to these conditions.
The network must have reasonably low network jitter, network delay, and packet loss rate.
Methods Supported
The ATA 187 supports these methods. For more information, see RFC3261 (SIP: Session Initiation
Protocol).
• REGISTER
• REFER
• INVITE
• BYE
• CANCEL
• NOTIFY
• OPTIONS
• ACK
• SUBSCRIBE
1-9
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Installation and Configuration Overview
Supplementary Services
SIP supplementary services are services that you can use to enhance your phone service. For information
on how to use these services, see
Chapter 7, “Using SIP Supplementary Services”.
The ATA 187 supports these SIP supplementary services:
• Caller ID
• Call-waiting caller ID
• Voice mail indication
• Making a conference call
• Call waiting
• Call forwarding
• Calling-line identification
• Unattended transfer
• Attended transfer
• Shared Line
• SpeedDial
• MeetMe
• Pick Up
• Redial
Installation and Configuration Overview
Table 1-1 provides the basic steps required to install and configure the ATA 187 to make it operational
in a typical SIP environment where a large number of ATA 187s must be deployed.
Ta b l e 1-1 Overview of the Steps Required to Install and Configure the ATA 187 and Make it
Operational
Action Reference
1. Plan the network and ATA 187 configuration.
2. Install the Ethernet connection.
3. Install and configure the other network devices.
4. Install the ATA 187 but do not power up the
ATA 187 yet.
Installing the ATA 187, page 3-3
5. Power up the ATA 187.
1-10
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Installation and Configuration Overview
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
/
