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Table Of Contents
ISUP and SIP-I Interworking for DPNSS CBWF Relay Feature Module
Related Features and Technology
Supported Standards, MIBs, and RFCs
Obtaining Documentation and Submitting a Service Request
ISUP and SIP-I Interworking for DPNSS CBWF Relay Feature Module
Document Release History
Feature History
This feature is described in the following sections:
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Supported Standards, MIBs, and RFCs
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Feature Description
The ISUP and SIP-I Interworking for DPNSS CBWF Relay feature allows a user who receives a busy signal, such as extension busy or network congestion, to request an automatic callback when trying to make a call through a private network.
A calling party can register for the feature with the originating PBX that requests the terminating PBX to monitor the called extension. When the called extension and the transmission path across the network become free, the user who invoked the feature is notified by a ring tone that the called extension is available. The user can then call back, and a call is set up from the user to the extension that is free.
With this feature, the Cisco PGW 2200 Softswitch can transparently relay DPNSS signaling encapsulated in ISUP signaling to SIP-I and vice versa. The Cisco PGW 2200 Softswitch neither controls nor has the knowledge of the DPNSS call states and message flows, and takes decisions pertaining to call setup, processing, and release purely from the ISUP-to-SIP-I interworking perspective and vice versa . This feature supports the protocol interworking of ISUP (UK ISUP version 3 variant) with SIP-I (encapsulating UK ISUP version 3 variant) carrying DPNSS signaling for CBWF and vice versa.
Figure 1 shows the basic network topology relevant to this feature.
Figure 1 Network Topology of ISUP-to-SIP-I (and Vice Versa) Relay of DPNSS CBWF Signaling
Benefits
This feature provides the following benefits:
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Prerequisites
The Cisco PGW 2200 Softswitch must be running software Release 9.8(1). The prerequisites for Release 9.8(1) 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
Cisco PGW 2200 Softswitch currently supports only the following limited ACI values in the application transport parameter:
0, 1, and 3 ACI values
Cisco PGW 2200 Softswitch currently does not support the following:
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Related Features and Technology
The following feature is related to this feature:
The SIP-I Protocol feature
This feature is available at:
http://www.cisco.com/en/US/docs/voice_ip_comm/pgw/9/feature/module/9.8_1_/SIP-I.html
Related Documents
This document contains information that is strictly related to this feature. The document that contains additional information related to SIP-I Protocol is available at:
http://www.cisco.com/en/US/docs/voice_ip_comm/pgw/9/feature/module/9.8_1_/SIP-I.html
Supported Standards, MIBs, and RFCs
This section identifies the new or modified standards, MIBs, and RFCs that are supported by this feature.
Standards
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MIBs
No new or modified MIBs are supported by this feature.
For more information about the MIBs used in the Cisco PGW 2200 Softswitch, see the list of 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.
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
Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at 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. (1005R)
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.
© 2011 Cisco Systems, Inc. All rights reserved.
