Configuring RTP Media Loopback for SIP Calls
|
|||||||||
Contents
Configuring RTP Media Loopback for SIP CallsLast Updated: March 22, 2012
RTP packets are looped back toward the source device when the RTP Media Loopback for SIP Calls feature is configured on a dial peer. The SIP RTP media loopback can be used during Cisco UBE deployments to make test calls to verify the media path between the endpoints and Cisco UBE. In a voice loopback call, an echo is heard at the device originating the call. In a video loopback call, the locally captured video and the audio echo must be rendered at the source device. Finding Feature InformationYour software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required. Prerequisites
Cisco Unified Border Element
Cisco Unified Border Element (Enterprise) Information About RTP Media Loopback for SIP CallsDigital Signal Processors (DSP) generate and transmit Real-time Transport Protocol (RTP) media packets from a source to a destination transport address during a SIP call session. However, when a SIP call is put on hold the DSP stops generating the RTP media packets and resumes generating and transmitting these media packets after the SIP call is resumed. This ensures that the RTP sequence number is continuous from the time of the origin to the end of a SIP call. How to Configure RTP Media Loopback for SIP CallsRTP packets are looped back toward the source device when the RTP Media Loopback for SIP Calls feature is configured on a dial peer. Perform this task to enable the RTP Media Loopback for SIP Calls feature on a dial peer. DETAILED STEPS Configuration Examples for RTP Media Loopback
Example: Configuring Video Loopback with Cisco Telepresence SystemThe following sample output shows Media Loopback for SIP Calls configured on a Cisco Telepresence System (CTS). ! codec profile 1 aacld fmtp "fmtp:96 profile-level-id=16;streamtype=5;mode=AAChbr;config=B98C00;sizeLength=13;indexLength=3;indexDeltaLength=3;constantDura tion=480" ! codec profile 2 h264 fmtp "fmtp:112 profile-level-id=4D0028;sprop-parametersets= R00AKAmWUgDwBDyA,SGE7jyA=;packetization-mode=1" ! voice class codec 4 codec preference 1 aacld profile 1 video codec h264 profile 2 ! dial-peer voice 2000 voip destination-pattern 2000 rtp payload-type cisco-codec-fax-ind 110 rtp payload-type cisco-codec-aacld 96 rtp payload-type cisco-codec-video-h264 112 session protocol sipv2 session target loopback:rtp incoming called-number 2000 voice-class codec 4 voice-class sip bandwidth audio tias-modifier 64000 voice-class sip bandwidth video tias-modifier 4500000 ! Example: Configuring Video Loopback with Cisco Unified Video AdvantageThe following sample output shows Media Loopback for SIP Calls configured on a Cisco Unified Video Advantage (CUVA). ! codec profile 3 h264 fmtp "fmtp:98 profile-level-id=420015" ! voice class codec 6 codec preference 1 g711ulaw video codec h264 profile 3 ! dial-peer voice 5000 voip description CUVA destination-pattern 5000 rtp payload-type cisco-codec-video-h264 98 session protocol sipv2 session target loopback:rtp incoming called-number 5000 voice-class codec 6 voice-class sip bandwidth video tias-modifier 384000 Feature Information for RTP Media Loopback for SIP CallsThe following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required. Feature History Table entry for the Cisco Unified Border Element.
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R) Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. © 2012 Cisco Systems, Inc. All rights reserved.
|
|||||||||