Cisco ATA 187 User guide

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Cisco ATA 187 Analog Telephone Adaptor

Administration Guide for SIP

Version 1.0

Text Part Number: OL-21862-01Text Part Number:

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Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP

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Contents

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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

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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

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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

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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

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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).

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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.

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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

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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

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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

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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

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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.

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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

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Chapter 1 Cisco ATA 187 Analog Telephone Adaptor 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

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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)

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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

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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

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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

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Cisco ATA 187 User guide

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