Session Initiation Protocol Overview | Cisco Systems ATA187I1ARF

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

				Layer 3
Telephone/fax	V		Broadband	IP infrastructure
	V	Ethernet
	Cisco ATA 187		Broadband CPE
			(DSL, cable,
			fixed wireless)

SIP proxy

Voice

gateway

V	PSTN

197596

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.

Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)

1-2	OL-21862-01

Image 12

Cisco Systems ATA187I1ARF manual Session Initiation Protocol Overview, SIP Capabilities

Contents

Americas Headquarters Text Part Number OL-21862-01Page N T E N T S Iii Installing the ATA 187 Privacy Physical Interfaces A-2 Preface OverviewAudience Organization Related Documentation Cisco ATA 187 Analog Telephone AdapterCisco Unified Communications Manager Viii Document Conventions Cisco Product Security OverviewCisco Unified Communications Manager Business Edition Convention Description Convention Description Cisco ATA 187 Analog Telephone Adaptor Overview Cisco Analog Telephone Adaptor Session Initiation Protocol Overview SIP Capabilities Components of SIP SIP Clients Software Features Hardware Overview Name Signaling Event based passthrough Secure Real-Time Transport ProtocolTransport Layer Security Protocol Fax Relay ATA 187 SIP Services Modem Standards Fax Services Methods Supported Installation and Configuration Overview Supplementary Services OL-21862-01 Preparing to Install the ATA 187 on Your Network Providing Power to the ATA Power GuidelinesPower Outage Understanding Phone Configuration Files Understanding the ATA 187 Startup Process Purpose Related Topics See Understanding Phone Configuration Files Requires MAC Method Address? Adding the ATA 187 with Auto-Registration Determining the MAC Address of an ATA OL-21862-01 Installing the ATA Network Requirements Safety Recommendations What the ATA 187 Package Includes Installing the ATA ProcedureAttaching a Phone to the ATA Verifying the ATA 187 Startup Process Configuring Startup Network Settings Configuring Security on the ATA Configuring the ATA Telephony Features Available for the ATAFeature Description Configuration Reference Unified Communications Manager Features and Services Guide, Client Administration Guide, Date/Time Group Configuring Product Specific Configuration Parameters Configuration Window PathParameter Description Adding Users to Cisco Unified Communications Manager Page OL-21862-01 Configuring Fax Services Using Fax ModeFax Modem Standards Fax Modem Speeds Troubleshooting and Maintenance Resolving Startup Problems Checking Network Connectivity Verifying DNS Settings Symptom ATA 187 Unable to Obtain IP Address ATA 187 Resets Unexpectedly Verifying Dhcp SettingsVerifying Physical Connection Identifying Intermittent Network Outages Checking Static IP Address Settings Verifying Voice Vlan ConfigurationEliminating DNS or Other Connectivity Errors Troubleshooting ATA 187 Security General Troubleshooting TipsChecking Power Connection Problem Possible Cause Troubleshooting and Maintenance General Troubleshooting Tips Where to Go for More Troubleshooting Information Halfduxcollisionexceedthreshold Cleaning the ATA Using SIP Supplementary Services Common Supplementary Services Attended Transfer Call PickupCaller ID Call-Waiting Caller ID Group Call Pickup Meet-Me ConferencePrivacy Shared Line Speed Dial RedialUnattended Transfer Voice Mail Indication Voice-Messaging SystemMaking a Conference Call in the United States Making a Conference Call in Sweden Call Waiting in the United StatesCall Waiting in Sweden About Call Forwarding Cancelling Call Forwarding Call Forwarding in the United StatesCall Forwarding in Sweden Forward Unconditional OL-21862-01 Accessing the IVR and Configuring Your Phone Setting Voice Menu Codes Action IVR Code Navigating Notes Vlan ID ATA 187 Specifications Physical SpecificationsDescription Specification Electrical Specifications Environmental SpecificationsPhysical Interfaces Ringing Characteristics Software Specifications SIP Compliance Reference Information Recommended ATA 187 Tone Parameter Values by Country Parameter Recommended Values Table B-3 Italy Numerics GL-1 GL-2 PBX GL-3 GL-4 GL-5 GL-6 GL-7 GL-8 Symbols IN-1 Dhcp IN-2 Dhcp DNS IN-3 Vlan IN-4