Cisco Systems ATA187I1ARF manual SIP Clients

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Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview

Session Initiation Protocol Overview

Figure 1-3

SIP Architecture

SIP proxy and redirect servers

SIP

SIP user agents

SIP		SIP
		SIP gateway
	RTP	PSTN
	RTP

Legacy PBX

72342

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.

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

1-4	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 Audience PrefaceOverview OrganizationCisco Unified Communications Manager Related DocumentationCisco ATA 187 Analog Telephone Adapter ViiiCisco Unified Communications Manager Business Edition Document ConventionsCisco Product Security Overview 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 OverviewTransport Layer Security Protocol Name Signaling Event based passthroughSecure Real-Time Transport 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 Power Outage Providing Power to the ATAPower Guidelines 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 IncludesAttaching a Phone to the ATA Installing the ATAProcedure Verifying the ATA 187 Startup ProcessConfiguring Startup Network Settings Configuring Security on the ATAFeature Description Configuration Reference Configuring the ATATelephony Features Available for the ATA Unified Communications Manager Features and Services Guide, Client Administration Guide, Date/Time Group Parameter Description Configuring Product Specific Configuration ParametersConfiguration Window Path Adding Users to Cisco Unified Communications Manager Page OL-21862-01 Fax Modem Standards Configuring Fax ServicesUsing Fax Mode Fax Modem Speeds Troubleshooting and Maintenance Resolving Startup ProblemsChecking Network Connectivity Verifying DNS Settings Symptom ATA 187 Unable to Obtain IP Address Verifying Physical Connection ATA 187 Resets UnexpectedlyVerifying Dhcp Settings Identifying Intermittent Network OutagesEliminating DNS or Other Connectivity Errors Checking Static IP Address SettingsVerifying Voice Vlan Configuration Checking Power Connection Troubleshooting ATA 187 SecurityGeneral Troubleshooting Tips Problem Possible CauseTroubleshooting and Maintenance General Troubleshooting Tips Where to Go for More Troubleshooting Information HalfduxcollisionexceedthresholdCleaning the ATA Using SIP Supplementary Services Common Supplementary ServicesCaller ID Attended TransferCall Pickup Call-Waiting Caller IDPrivacy Group Call PickupMeet-Me Conference Shared LineUnattended Transfer Speed DialRedial Making a Conference Call in the United States Voice Mail IndicationVoice-Messaging System Call Waiting in Sweden Making a Conference Call in SwedenCall Waiting in the United States About Call ForwardingCall Forwarding in Sweden Cancelling Call ForwardingCall Forwarding in the United States Forward UnconditionalOL-21862-01 Accessing the IVR and Configuring Your Phone Setting Voice Menu CodesAction IVR Code Navigating Notes Vlan IDDescription Specification ATA 187 SpecificationsPhysical Specifications Physical Interfaces Electrical SpecificationsEnvironmental Specifications 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