دانلود پاورپوینت ISDN
نوع فایل: power point
فرمت فایل: pptx
قابل ویرایش
تعداد اسلاید : 30 صفحهقسمتی از پاورپوینت : ISDN - Integrated Services Digital NetworkTelephone services -> Telecommunication servicesUsed for voice, image and dataE - series for Telephone network and ISDNI - series for ISDN concepts, aspects and interfacesLayer 1 - Physical (2B1Q)Layer 2 - Data Link (Q.920 - Q.923)Layer 3 - Network (Q.930 - Q.939) Types of channelsBearer channel (B-channel=64 kb/s) clear pipe for dataDelta channel (D-channel, 16 kb/s or 64 kb/s) call signaling information:who is callingtype of callcalling what number

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برچسب ها: download-PowerPoint-ISDN