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dc.contributor.authorChang, Ming-Fengen_US
dc.contributor.authorLu, Fang-Sunen_US
dc.contributor.authorChia, Chung-Yungen_US
dc.date.accessioned2014-12-08T15:07:15Z-
dc.date.available2014-12-08T15:07:15Z-
dc.date.issued2010-03-15en_US
dc.identifier.issn0140-3664en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.comcom.2009.10.020en_US
dc.identifier.urihttp://hdl.handle.net/11536/5726-
dc.description.abstractPrivate Telecommunications Networks (PTNs), such as enterprise telephony and Voice over IP (VoIP), have been widely deployed. A common limitation of PTNs is that PTN users are usually not assigned with Public Switched Telephone Network (PSTN) EA 64 numbers. A PTN user is usually identified by an extension number or a URI (universal resource identifier). When a PTN user initiates a call to a PSTN user, it is not possible to use the PTN calling party's identifier as the caller ID; instead, an E.164 number of the PBX or VoIP gateway is used. As a result, the PSTN called party cannot use the caller ID received to call back to the PTN calling party later, if the PTN user's extension number or URI is unknown. This paper proposes a callback table approach to solve this problem. We describe how the call-out information is stored into and retrieved from a callback table maintained in the PBXs; or VoIP gateways to provide callback service. Numeric analysis has been performed to evaluate the performance of this callback solution. The numeric results indicate that the callback method provides a satisfactory solution when there is sufficient voice traffic served by a VoIP gateway. (C) 2009 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectVoIPen_US
dc.subjectPSTNen_US
dc.subjectCallbacken_US
dc.subjectVoIP gatewayen_US
dc.titleA callback mechanism for Private Telecommunications Networksen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.comcom.2009.10.020en_US
dc.identifier.journalCOMPUTER COMMUNICATIONSen_US
dc.citation.volume33en_US
dc.citation.issue5en_US
dc.citation.spage583en_US
dc.citation.epage588en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000274760400005-
dc.citation.woscount1-
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