{"title":"网关","authors":"M. O’Kelly","doi":"10.1002/9781118786352.wbieg2055","DOIUrl":null,"url":null,"abstract":"Gateways provide a number of methods for connecting an IP telephony network to the Public Switched Telephone Network (PSTN), a legacy PBX, or key systems. Gateways range from specialized, entry-level and stand-alone voice gateways to high-end, feature-rich integrated router and Cisco Catalyst gateways. This chapter explains important factors to consider when selecting a Cisco gateway to provide the appropriate protocol and feature support for your IP Telephony network. The main topics discussed in this chapter include: • Traffic Patterns and Gateway Sizing, page 13-2 • TDM and VoIP Trunking Gateways, page 13-7 • Understanding Cisco Gateways, page 13-8 • Gateway Selection, page 13-9 • Fax and Modem Support, page 13-19 • Gateways for Video Telephony, page 13-27","PeriodicalId":373518,"journal":{"name":"International Encyclopedia of Geography","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Gateways\",\"authors\":\"M. O’Kelly\",\"doi\":\"10.1002/9781118786352.wbieg2055\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Gateways provide a number of methods for connecting an IP telephony network to the Public Switched Telephone Network (PSTN), a legacy PBX, or key systems. Gateways range from specialized, entry-level and stand-alone voice gateways to high-end, feature-rich integrated router and Cisco Catalyst gateways. This chapter explains important factors to consider when selecting a Cisco gateway to provide the appropriate protocol and feature support for your IP Telephony network. The main topics discussed in this chapter include: • Traffic Patterns and Gateway Sizing, page 13-2 • TDM and VoIP Trunking Gateways, page 13-7 • Understanding Cisco Gateways, page 13-8 • Gateway Selection, page 13-9 • Fax and Modem Support, page 13-19 • Gateways for Video Telephony, page 13-27\",\"PeriodicalId\":373518,\"journal\":{\"name\":\"International Encyclopedia of Geography\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Encyclopedia of Geography\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/9781118786352.wbieg2055\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Encyclopedia of Geography","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/9781118786352.wbieg2055","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Gateways provide a number of methods for connecting an IP telephony network to the Public Switched Telephone Network (PSTN), a legacy PBX, or key systems. Gateways range from specialized, entry-level and stand-alone voice gateways to high-end, feature-rich integrated router and Cisco Catalyst gateways. This chapter explains important factors to consider when selecting a Cisco gateway to provide the appropriate protocol and feature support for your IP Telephony network. The main topics discussed in this chapter include: • Traffic Patterns and Gateway Sizing, page 13-2 • TDM and VoIP Trunking Gateways, page 13-7 • Understanding Cisco Gateways, page 13-8 • Gateway Selection, page 13-9 • Fax and Modem Support, page 13-19 • Gateways for Video Telephony, page 13-27
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