Cisco Systems ASR 1000 manual RTP to SIP Interworking, SIP to RTP Interworking

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Chapter 3 DTMF Interworking

RTP to SIP Interworking

•RTP DTMF insertion—The RTP packets contain information in their headers indicating that a DTMF is being generated. The endpoints interpret these messages and play the DTMF locally.

•In-band waveform—The DTMF is sent as part of the voice waveform.

RTP to SIP Interworking

In the case where the RTP stream is carrying the DTMF stream, the RTP packet is removed from the stream and the DBE sends an H.248 message to the SBE indicating that a DTMF event has occurred and that this should be converted into a SIP DTMF event.

SIP to RTP Interworking

In the case of an endpoint generating a SIP signal, the SIP DTMF signals arrive completely out of band. An endpoint that supports SIP DTMF generates the signals to the SBE. The SBE recognizes that this is a DTMF message and sends an H.248 message to the DBE that a DTMF tone is required to be inserted into the RTP stream. The DBE then inserts the RTP DTMF packets into the audio stream.

Configuring Default Duration of a DTMF Event

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

Use the dtmf-durationcommand in VDBE configuration mode to configure a default duration of a DTMF event. If there is no DTMF duration configured, the system default is 200 milliseconds.

Prerequisites

Before implementing interworking DTMF, the DBE must already be created.

SUMMARY STEPS

1.enable

2.configure terminal

3.sbc {sbc-name}dbe

4.vdbe [global]

5.dtmf-duration {duration}

6.exit

7.end

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

3-2	OL-15421-01

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Contents Americas Headquarters Page N T E N T S IiiQoS Bandwidth Allocation Traffic Management Package Support Local Source Properties Address and Port IPv6 Support ViiEvents Storage Until Event Acknowledgment Objectives PrefaceDocument Revision History OL-15421-01 May 5 This document was first publishedIntended Audience OrganizationCisco ASR 1000 Series Router Documentation Related DocumentationDocument Conventions Cisco IOS Release 12.2SR Software PublicationsXii Obtaining Documentation and Submitting a Service Request XiiiXiv Contents Cisco ASR 1000 Series Routers OverviewGeneral Overview Distributed and Unified Models Example of SBC High Level ArchitectureOn page 1-3illustrates the unified model Supported Integrated Session Border Controller Features Release Feature Name Related SBC Commands DocumentedPackage segment None Cisco IOS Logging Level in ConfiguringCisco IOS XE ReleaseMedia-address ipv4 Transaction-pending command Deployment of the Integrated Session Border ControllerIntegrated SBC Used for VoIP Interworking Integrated Session Border Controller DBE Deployment Scenario Configuring Integrated Session Border Controller Prerequisites for Integrated Session Border ControllerRestrictions for Integrated Session Border Controller Prerequisites Summary StepsEnters global configuration mode Enables privileged Exec modeEnter your password if prompted Enters into interface configuration modeConfigures the H.248 controller for the DBE and enters into Configures the DBE to use a specific IPv4 H.248 controlOwn address when connecting to the SBE Controller H.248 configuration modeTroubleshooting Tips What To Do NextExamples Configuring H.248 Logging Level Sets a specified logging level to generate detailed logs Creates the DBE service on the SBC and enters intoSBC-DBE configuration mode Messages sent and received. Turns on consoleEnabling H.248 Logging Requests and Responses Configuration Examples This section provides the following configuration examplesExample H.248 Log Output SBC DBE Configuration Steps Example Making Global Changes to Controllers Example Following example shows the initial SBC configuration == Make change to local portMaking Changes to Individual Controller Settings Example Control-address h248 ipv4 172.25.2.26 controller h248Cisco H.248 Profile Topology Priority Indicator Yes Emergency IndicatorIeps Indicator Yes Overview of ProfileProfile Packages Package ID VersionPackage ID Version Support Dependent On Dtmf Interworking Information About Dtmf InterworkingConfiguring Default Duration of a Dtmf Event RTP to SIP InterworkingSIP to RTP Interworking Name of the DBE service Enters the mode of a DBE service and enters into SBC-DBEConfiguration mode. Use the sbc-name argument to specify Configures the default duration of a Dtmf eventPage Restrictions for Configuring Media Address Pools Media Address PoolsPrerequisites for Implementing Media Address Pools Configuring Media Address Pools Information About Media Address PoolsConfiguration mode Is configuredEnters into SBC-DBE configuration mode Creates a port range for the configured mediaConfiguring Media Address Pools Example Quality of Service and Bandwidth Management Traffic Management Package SupportPage Dscp Marking and IP Precedence Marking Dscp Re-MarkingsParameters on AC and per SDP on QoS Bandwidth Allocation Rtcp Policing Using Tman PackageRtcp Policing Not Using Tman Package Rtcp PolicingTwo-Rate Three-Color Policing and Marking Enabling Two-Rate Three-Color Policing and MarkingImplementing Two-Rate Three-Color Policing and Marking DBE Restrictions Related Commands Page Packages-Signaling and Control Enabling Optional H.248 PackagesAddress Reporting Package Segmentation Package SupportSession Failure Reaction Package Tsc-quiesce Feature Termination State Control PackageTsc-suspend Feature 248.1v3 Support Vlan Package Syntax-Level SupportMGC-Controlled Gateway-Wide Properties Page Services-Signaling and Control DBE Signaling Pinhole Support Extension to H.248 Audit Support Extension to H.248 Termination Wildcarding SupportFlexible Address Prefix Provisioning Twice Napt Pinhole Hairpinning Local Source Properties Address and PortLocally Hairpinned Sessions No Napt Pinhole HairpinningMGC-Specified Local Addresses or Ports Multi-Stream Terminations Nine-Tier Termination Name HierarchyRestrictions for Nine-Tier Termination Name Hierarchy Information About Nine-Tier Termination Name Hierarchy Displaying the Nine-Tier Termination Name HierarchyDisplaying the Nine-Tier Termination Name Hierarchy Example Abc/voice/gn/0/1/0/1/ac/3Optional Local and Remote Descriptors ServiceChange Notification for Interface Status Change Remote Source Address Mask FilteringRTP Specific Behavior Support Sbc interface-id value End Configuration Example Output Tmax-timercommand configures the value of the T-MAX timer MAX TimerTsc-Delay Timer Video on Demand VOD SupportServices-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 Interim Authentication Header Support Latch and Relatch SupportLocal Source Properties Address and Port Napt and NAT Traversal Etsi TS 102 333 version 1.1.2 Gate Management PackageTopology Hiding Traffic Management PolicingTopology Hiding IPv4 Twice Napt IPv6 Inter-Subscriber BlockingQoS Policy-Map-Based Inter-Subscriber Blocking Method Router# show run interface gigabitEthernet 0/1.1101Router# show class-map IPv6intersubscriber IPv6 Support ACL-Based Inter-Subscriber Blocking MethodIPv6 Pinholes IPv6 No Napt Support for Media FlowsIPv6 Single Napt for Signaling Send RecvSingle Napt Signaling Flow No Napt Pinholes Topology Hiding No Napt Pinholes High Availability Support Integrated Session Border Controller High Availability10-1 Route Processor Redundancy RPR Hardware RedundancySoftware Redundancy 10-2SSO Support Issu Support10-3 10-4 High Availability Support Issu SupportQuality Monitoring and Statistics Gathering 11-1DBE Status Notification Congestion-threshold CommandBilling and Call Detail Records Enhanced Event Notification and AuditingRetention and Returning of H.248 Event Information 11-3Silent Gate Deletion Association ResetResetting the Media Timeout Timers 11-4Middlebox Pinhole Timer Expired Event Network Package Quality Alert Event11-5 Provisioned Inactivity Timer Related Command11-6 IN-1 IN-2 IN-3 RTP specific behavior support SBE Pinhole Pinhole timeoutPolicing Asymmetric policing Ipv6 packets IN-4IN-5 IN-6