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Vocaltec SS7 Solution White Paper VocalTec Architecture A Standards-based Platform for IP Telephony ______________________________________________________________________________________ VocalTec SS7 Solution White Paper Release 1.4 January 2001 VocalTec Communication Information in this document is subject to change without notice. This document may not be reproduced or transmitted in any form or by any means without the express written permission of VocalTec Communications Ltd. © 2001 VocalTec Communications Ltd. All rights reserved. VocalTec®, VocalTec Gatekeeper, VocalTec Telephony Gateway and VocalTec Network Manager are trademarks or registered trademarks of VocalTec Communications Ltd. All other trademarks are the property of their respective owners. SS7 White Paper, 3rd edition – January 2001 Headquarters Europe, Middle East and Africa Asia and Pacific Rim Israel Italy Hong Kong (HQ) 2 Maskit street Via Cassia 1081 Suite 2001, 20/F, Tower 1 Herzeliya 46733 00148 Rome Lippo Centre, 89 Queensway Israel Italy Admiralty, Hong Kong Tel: 972-9-970-7800 Tel: 39-06-302-60311 Tel: 852-2530-0452 Fax: 972-9-956-1867 Fax: 39-06-302-60312 Fax: 852-2801-4555 Americas France Australia USA 91 rue du Faubourg Saint-Honoré Level 21, Suite 34, Tower 2 One Executive Drive, Suite 320 75008 Paris 201 Sussex Street Fort Lee, NJ 07024-3393 France Sydney 2000, NSW USA Tel: 33-1-4471-3666 Australia Tel: 1-201-228-7000 Fax: 33-1-4471-3696 Tel: 61-2-9006-1310 Fax: 1-201-363-8986 Fax: 61-2-9006-1010 Germany China August-Bebel-Allee 6 Suite 815, Beijing Silver Tower D-53175 Bonn No. 2 San Huan North Rd Germany Chaoyang District, Beijing 100027, Tel: 49-228-30887-20 China Fax: 49-228-30887-11 Tel: 86-10-641-07140 Fax: 86-10-641-07143 Spain Japan Bendicion de Campos, 8 Takanawadai Green Bldg 7F 28036 Madrid 4-6-6 Higashi Gotanda Spain Shinagawa-ku, Tokyo 141-0022 Tel: 34-91-350-6633 Japan Fax: 34-91-350-7014 Tel: 81-35-791-1405 Fax: 81-35-791-1406 UK Singapore Tel: 44-1372-723622 180B Bencoolen Street Fax: 44-870-1315771 # 07-04 The Bencoolen Singapore 189648 Tel: 65-238-2415 Fax: 65-238-8230 email: [email protected] http://www.vocaltec.com Publication number: VTWP- SS7 -01-2001-V3-R1-E VocalTec SS7 Solution Page 1 VocalTec Communication Contents Introduction..........................................................................................................4 Overview ...................................................................................................................................... 4 SS7 Network ................................................................................................................................ 4 SS7 Advantages .......................................................................................................................... 5 SS7 Market .................................................................................................................................. 5 SS7 Technology/ Network Elements ........................................................................................... 5 SS7 Signaling Points ................................................................................................................... 6 Service Switching Point (SSP) ................................................................................................. 6 Signal Transfer Point (STP) ..................................................................................................... 6 Service Control Point (SCP)..................................................................................................... 6 SS7 Network Availability .......................................................................................................... 6 SS7 Signaling Links Types....................................................................................................... 7 SS7 Protocol Stack .................................................................................................................. 8 Message Transfer Part............................................................................................................. 8 ISDN User Part (ISUP)............................................................................................................. 9 Telephone User Part (TUP)...................................................................................................... 9 Signaling Connection Control Part (SCCP).............................................................................. 9 Transaction Capabilities Applications Part (TCAP).................................................................. 9 ISUP Call Flow ....................................................................................................................... 10 VocalTec’s SS7 Solution ....................................................................................11 VocalTec’s SS7 Solution ....................................................................................11 SS7 Introduction......................................................................................................................... 11 Migrating to SS7..................................................................................................................... 11 VocalTec SS7 Architecture .................................................................................................... 11 VocalTec SS7 Signaling Gateway.......................................................................................... 11 SS7 Configurations .................................................................................................................... 12 Non-Associated SS7 Configuration........................................................................................ 12 Associated SS7 Configuration................................................................................................ 13 Multiple Media Gateways Configuration................................................................................. 14 Redundant Signaling Gateways Configuration ...................................................................... 14 SS7 Solution Details .................................................................................................................. 15 Signaling Gateways Features ................................................................................................ 15 Network Redundancy/Availability........................................................................................... 15 VocalTec SS7 Solution Page 2 VocalTec Communication Signaling Gateway hook-ups ................................................................................................. 17 Media Gateway hook-ups....................................................................................................... 17 Support for Multiple Gateways ............................................................................................... 17 SS7 Management ...................................................................................................................... 18 Phone To Phone Call Flow ........................................................................................................ 19 Supported Services under SS7.............................................................................................. 16 Supported SS7 Standards...................................................................................................... 16 Supported SS7 Flavors .......................................................................................................... 16 Glossary..............................................................................................................20 Figures Figure 1 - SS7 Signaling Points....................................................................................................... 6 Figure 2 - SS7 Network Design for Availability................................................................................ 7 Figure 3 - SS7 Signaling Link Types ............................................................................................... 7 Figure 4 - SS7 Protocol stack.......................................................................................................... 8 Figure 5 - SS7 ISUP Call Flow ...................................................................................................... 10 Figure 6 - VocalTec SS7 Architecture ........................................................................................... 11 Figure 7 - Associated Configurations ............................................................................................ 12 Figure 8 - Associated Configurations ............................................................................................ 13 Figure 9 – Multiple Media Gateways Configurations..................................................................... 14 Figure 10 – Redundant Signaling Gateways Configurations ........................................................ 14 Figure 12 – Phone-to-Phone Call Flow ......................................................................................... 19 Tables Table 1 - ISUP Call Setup Messages............................................................................................ 10 Table 2 - Supported SS7 Standards.............................................................................................. 16 Table 3 - Supported SS7 Flavors .................................................................................................. 17 VocalTec
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