Cisco Systems ATA187I1ARF manual Session Initiation Protocol Overview, SIP Capabilities

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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

				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

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Contents Americas Headquarters Text Part Number OL-21862-01Page N T E N T S IiiInstalling the ATA 187 Privacy Physical Interfaces A-2 Preface OverviewAudience OrganizationRelated Documentation Cisco ATA 187 Analog Telephone AdapterCisco Unified Communications Manager Viii Document Conventions Cisco Product Security Overview Cisco Unified Communications Manager Business Edition Convention DescriptionConvention Description Cisco ATA 187 Analog Telephone Adaptor Overview Cisco Analog Telephone AdaptorSession Initiation Protocol Overview SIP CapabilitiesComponents of SIP SIP Clients Software Features Hardware OverviewName Signaling Event based passthrough Secure Real-Time Transport ProtocolTransport Layer Security Protocol Fax RelayATA 187 SIP Services Modem StandardsFax Services Methods SupportedInstallation and Configuration Overview Supplementary ServicesOL-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 TopicsSee 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 RequirementsSafety Recommendations What the ATA 187 Package IncludesInstalling the ATA ProcedureAttaching a Phone to the ATA Verifying the ATA 187 Startup ProcessConfiguring Startup Network Settings Configuring Security on the ATAConfiguring 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 ProblemsChecking 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 OutagesChecking Static IP Address Settings Verifying Voice Vlan ConfigurationEliminating DNS or Other Connectivity Errors Troubleshooting ATA 187 Security General Troubleshooting TipsChecking Power Connection Problem Possible CauseTroubleshooting and Maintenance General Troubleshooting Tips Where to Go for More Troubleshooting Information HalfduxcollisionexceedthresholdCleaning the ATA Using SIP Supplementary Services Common Supplementary ServicesAttended Transfer Call PickupCaller ID Call-Waiting Caller IDGroup Call Pickup Meet-Me ConferencePrivacy Shared LineSpeed 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 ForwardingCancelling Call Forwarding Call Forwarding in the United StatesCall Forwarding in Sweden Forward UnconditionalOL-21862-01 Accessing the IVR and Configuring Your Phone Setting Voice Menu CodesAction IVR Code Navigating Notes Vlan IDATA 187 Specifications Physical SpecificationsDescription Specification Electrical Specifications Environmental SpecificationsPhysical Interfaces Ringing Characteristics Software SpecificationsSIP Compliance Reference Information Recommended ATA 187 Tone Parameter Values by Country Parameter Recommended ValuesTable B-3 Italy Numerics GL-1GL-2 PBX GL-3GL-4 GL-5 GL-6 GL-7 GL-8 Symbols IN-1Dhcp IN-2Dhcp DNS IN-3Vlan IN-4