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Table Of Contents
Support for Tel URI in SIP Diversion Header Feature Module
Supported Standards, MIBs, and RFCs
Obtaining Documentation and Submitting a Service Request
Support for Tel URI in SIP Diversion Header Feature Module
Document Release History
Feature History
9.8(1)
The Support for Tel URI in SIP Diversion Header feature is introduced in the Cisco PGW 2200 Softswitch software.
This document describes the Support for tel Uniform Resource Identifier (URI) in the Session Initiation Protocol (SIP) Diversion Header feature. Details of this feature are provided in the following sections:•
Supported Standards, MIBs, and RFCs
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Feature Description
Diversion information in incoming SIP messages, such as INVITE and 3xx, may have tel URI. Currently, the Cisco PGW 2200 Softswitch supports only the SIP URI in the Diversion header. The Support for Tel URI in SIP Diversion Header feature enables the Cisco PGW 2200 Softswitch to relay the Diversion headers received with incoming SIP requests or responses to the outgoing SIP network. If multiple Diversion headers are present, the Cisco PGW 2200 Softswitch relays information pertaining to all the Diversion headers to the outgoing SIP network. The Cisco PGW 2200 Softswitch will also parse and handle the tel-URI-formatted Diversion headers in the SIP.
The following is a summary of the different scenarios in which the Support for Tel URI in SIP Diversion Header feature is enabled:
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Figure 1 shows a sample call flow that illustrates the relaying of the tel URI received in the Diversion header of the INVITE for the SIP-to-SIP calls.
Figure 1 Sample Call Flow 1 for SIP-to-SIP Calls
Figure 2 show a sample call flow that illustrates how the Cisco PGW 2200 Softswitch receives 302 back from a SIP destination and relays the same back to the peer SIP network.
Figure 2 Sample Call Flow 2 for SIP-to-SIP Calls
Figure 3 shows a sample call flow that illustrates how the Cisco PGW 2200 Softswitch receives 302 back from a SIP destination and sends an INVITE to a new SIP destination.
Figure 3 Sample Call Flow 3 for SIP-to-SIP Calls
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Figure 4 show a sample call flow illustrating an ISUP-to-SIP interoperation.
Figure 4 Sample Call Flow showing ISUP-to-SIP Interoperation
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Benefits
This feature provides the following benefits:
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Prerequisites
The Cisco PGW 2200 Softswitch must be running Cisco PGW 2200 Softswitch software Release 9.8(1). The prerequisites for this release of Cisco PGW 2200 Softswitch can be found in Release Notes for the Cisco PGW 2200 Softswitch Release 9.8(1) at:
http://www.cisco.com/en/US/docs/voice_ip_comm/pgw/9/release/note/rn981.html
Restrictions or Limitations
The Support for Tel URI in SIP Diversion Header feature has the following limitations:
The Cisco PGW 2200 Softswitch will relay all the information mentioned in this document to the outgoing SIP network. This does not cover the local processing of tel URI received in the diversion header.
Related Documents
This document contains information that is strictly related to this feature. Documents that contain additional information about the Cisco PGW 2200 Softswitch are available at:
http://www.cisco.com/en/US/products/hw/vcallcon/ps2027/tsd_products_support_series_home.html
Supported Standards, MIBs, and RFCs
This section identifies the new or modified standards, MIBs, and RFCs that are supported by this feature.
Standards
No new or modified standards are supported by this feature.
MIBs
No new or modified MIBs are supported by this feature.
For more information on the MIBs used in the Cisco PGW 2200 Softswitch, see Cisco PGW 2200 Softswitch MIBs at:
http://www.cisco.com/iam/PGW_MIBS/index.html
RFCs
No new or modified RFCs are supported by this feature.
Provisioning Examples
This section provides provisioning examples for this feature. Additional provisioning examples pertaining to the Cisco PGW 2200 Softswitch can be found in the Cisco PGW 2200 Softswitch Release 9.8 Provisioning Guide. Additional dial plan examples pertaining to the Cisco PGW 2200 Softswitch can be found in the Cisco PGW 2200 Softswitch Release 9.8 Dial Plan Guide.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS Version 2.0.
Glossary
Table 1 Acronym Expansions
ISUP
ISDN User Part
MML
Man-Machine Language
PGW
PSTN Gateway
SIP
Session Initiation Protocol
Tel URI
Telephone Uniform Resource Identifier
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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.
