Dtmf Interworking | Cisco Systems ASR 1000 instruction

C H A P T E R 3

DTMF Interworking

This chapter describes the importance and function of dual-tone multifrequency (DTMF) interworking between various signaling types and how DTMF is supported on the Integrated Session Border Controller.

For a complete description of commands used in this chapter, refer to the Cisco IOS Integrated Session Border Controller Command Reference.

Contents

•Information About DTMF Interworking, page 3-1

•RTP to SIP Interworking, page 3-2

•SIP to RTP Interworking, page 3-2

•Configuring Default Duration of a DTMF Event, page 3-2

Information About DTMF Interworking

One of the features of the Integrated Session Border Controller is the ability to interwork between the various dual-tone multifrequency (DTMF) signaling types. DTMF interworking is used when the two endpoints do not use the same type for relaying DTMF tones.

DTMF dialing consists of simultaneous voice-band tones generated when a button is pressed on a telephone. The challenge comes from a scenario where one side uses Real-time Transport Protocol (RTP) and the other uses Session Initiation Protocol (SIP) signaling to enable advanced telephony services. Examples of the types of services and platforms that are supported by DTMF interworking are various voice web browser services, Centrex switches or business service platforms, calling card services, and unified message servers. All of these applications require DTMF interworking for the user to communicate with the application outside of the media connection.

The Cisco ASR 1000 Series Aggregation Services Routers only support DTMF interworking between RTP and SIP DTMF indication types. This type of DTMF interworking provides for DTMF signals generated by SIP to be inserted into an RTP stream and RTP DTMF tones to be extracted and to generate a SIP message.

The following are ways of generating a DTMF tone:

•SIP digit detection and generation package—A SIP message is sent from the endpoint to the SIP proxy indicating that there has been a DTMF event, the type and the duration of the event.

Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers

	OL-15421-01	3-1

Image 41

Cisco Systems ASR 1000 manual Information About Dtmf Interworking

Contents

Americas Headquarters Page Iii N T E N T S QoS Bandwidth Allocation Traffic Management Package Support Local Source Properties Address and Port Vii IPv6 Support Events Storage Until Event Acknowledgment Document Revision History PrefaceObjectives OL-15421-01 May 5 This document was first published Organization Intended Audience Document Conventions Related DocumentationCisco ASR 1000 Series Router Documentation Cisco IOS Release 12.2SR Software Publications Xii Xiii Obtaining Documentation and Submitting a Service Request Xiv General Overview ContentsCisco ASR 1000 Series Routers Overview Example of SBC High Level Architecture Distributed and Unified Models On page 1-3illustrates the unified model Release Feature Name Related SBC Commands Documented Supported Integrated Session Border Controller Features Package segment Cisco IOS Cisco IOS Logging Level in ConfiguringNone XE Release Media-address ipv4 Deployment of the Integrated Session Border Controller Transaction-pending command Integrated SBC Used for VoIP Interworking Integrated Session Border Controller DBE Deployment Scenario Restrictions for Integrated Session Border Controller Configuring Integrated Session Border ControllerPrerequisites for Integrated Session Border Controller Summary Steps Prerequisites Enter your password if prompted Enables privileged Exec modeEnters global configuration mode Enters into interface configuration mode Own address when connecting to the SBE Configures the DBE to use a specific IPv4 H.248 controlConfigures the H.248 controller for the DBE and enters into Controller H.248 configuration mode Examples Troubleshooting TipsWhat To Do Next Configuring H.248 Logging Level SBC-DBE configuration mode Creates the DBE service on the SBC and enters intoSets a specified logging level to generate detailed logs Messages sent and received. Turns on console Enabling H.248 Logging Requests and Responses Example H.248 Log Output Configuration ExamplesThis section provides the following configuration examples SBC DBE Configuration Steps Example Making Global Changes to Controllers Example == Make change to local port Following example shows the initial SBC configuration Control-address h248 ipv4 172.25.2.26 controller h248 Making Changes to Individual Controller Settings Example Ieps Indicator Yes Topology Priority Indicator Yes Emergency IndicatorCisco H.248 Profile Overview of Profile Package ID Version Profile Packages Package ID Version Support Dependent On Information About Dtmf Interworking Dtmf Interworking SIP to RTP Interworking Configuring Default Duration of a Dtmf EventRTP to SIP Interworking Configuration mode. Use the sbc-name argument to specify Enters the mode of a DBE service and enters into SBC-DBEName of the DBE service Configures the default duration of a Dtmf eventPage Prerequisites for Implementing Media Address Pools Restrictions for Configuring Media Address PoolsMedia Address Pools Information About Media Address Pools Configuring Media Address Pools Enters into SBC-DBE configuration mode Is configuredConfiguration mode Creates a port range for the configured media Configuring Media Address Pools Example Traffic Management Package Support Quality of Service and Bandwidth ManagementPage Parameters on AC and per SDP on Dscp Marking and IP Precedence MarkingDscp Re-Markings Rtcp Policing Not Using Tman Package Rtcp Policing Using Tman PackageQoS Bandwidth Allocation Rtcp Policing Implementing Two-Rate Three-Color Policing and Marking Two-Rate Three-Color Policing and MarkingEnabling Two-Rate Three-Color Policing and Marking DBE Restrictions Related Commands Page Enabling Optional H.248 Packages Packages-Signaling and Control Segmentation Package Support Address Reporting Package Session Failure Reaction Package Termination State Control Package Tsc-quiesce Feature Tsc-suspend Feature Vlan Package Syntax-Level Support 248.1v3 Support MGC-Controlled Gateway-Wide Properties Page Services-Signaling and Control DBE Signaling Pinhole Support Extension to H.248 Termination Wildcarding Support Extension to H.248 Audit Support Flexible Address Prefix Provisioning Locally Hairpinned Sessions Local Source Properties Address and PortTwice Napt Pinhole Hairpinning No Napt Pinhole Hairpinning MGC-Specified Local Addresses or Ports Restrictions for Nine-Tier Termination Name Hierarchy Multi-Stream TerminationsNine-Tier Termination Name Hierarchy Displaying the Nine-Tier Termination Name Hierarchy Information About Nine-Tier Termination Name Hierarchy Abc/voice/gn/0/1/0/1/ac/3 Displaying the Nine-Tier Termination Name Hierarchy Example Optional Local and Remote Descriptors RTP Specific Behavior Support ServiceChange Notification for Interface Status ChangeRemote Source Address Mask Filtering Sbc interface-id value End Configuration Example Output Tsc-Delay Timer MAX TimerTmax-timercommand configures the value of the T-MAX timer Video on Demand VOD Support Services-Signaling and Control Video on Demand VOD Support Services-Signaling and Control Video on Demand VOD Support Integrated Session Border Controller Security Firewall Media Pinhole Control Latch and Relatch Support Interim Authentication Header Support Local Source Properties Address and Port Etsi TS 102 333 version 1.1.2 Gate Management Package Napt and NAT Traversal Traffic Management Policing Topology Hiding Topology Hiding IPv6 Inter-Subscriber Blocking IPv4 Twice Napt Router# show run interface gigabitEthernet 0/1.1101 QoS Policy-Map-Based Inter-Subscriber Blocking Method Router# show class-map IPv6intersubscriber ACL-Based Inter-Subscriber Blocking Method IPv6 Support IPv6 No Napt Support for Media Flows IPv6 Pinholes Send Recv IPv6 Single Napt for Signaling Single Napt Signaling Flow No Napt Pinholes Topology Hiding No Napt Pinholes 10-1 High Availability SupportIntegrated Session Border Controller High Availability Software Redundancy Hardware RedundancyRoute Processor Redundancy RPR 10-2 10-3 SSO SupportIssu Support High Availability Support Issu Support 10-4 11-1 Quality Monitoring and Statistics Gathering Billing and Call Detail Records Congestion-threshold CommandDBE Status Notification Enhanced Event Notification and Auditing 11-3 Retention and Returning of H.248 Event Information Resetting the Media Timeout Timers Association ResetSilent Gate Deletion 11-4 11-5 Middlebox Pinhole Timer Expired EventNetwork Package Quality Alert Event 11-6 Provisioned Inactivity TimerRelated Command IN-1 IN-2 IN-3 Policing Asymmetric policing Ipv6 packets Pinhole Pinhole timeoutRTP specific behavior support SBE IN-4 IN-5 IN-6