提名的名单
发表于 2025-3-28 14:50:00
The Integrated Services Digital Network (ISDN),studies of integrated digital networks (IDN) for telephony and that studies leading to an Integrated Services Digital Network (ISDN) were needed. Some conceptual principles to guide the studies provided for:
Rankle
发表于 2025-3-28 19:21:52
A Network in Transition,ony standards has been toward enabling worldwide application rather than having each national network go its own way. While national networks still are interconnected through gateways, primarily for billing control, international signaling systems are becoming standardized with only minor national differences.
aerial
发表于 2025-3-29 02:11:28
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progestogen
发表于 2025-3-29 07:03:40
Dipti Singh,Seema Agrawal,Kusum Deepe being made to encode voice at lower information rates (b/s) than required for 64-kb/s PCM, as described in Chapter 3. The fact that 64-kb/s PCM, as such, generally requires much more bandwidth than does a 3-kHz analog signal is of itself a continuing incentive to seek lower-bit-rate forms of digitized speech.
happiness
发表于 2025-3-29 11:12:37
Molecular Biology in Embryologyon during those years, however, satellite earth stations all over the world were built based upon the analog frequency-division multiplex (FDM) hierarchy. Only with the advent of Satellite Business Systems (SBS) was an alldigital satellite system developed, with the initial objective, however, of data rather than voice communication.
残暴
发表于 2025-3-29 14:35:10
Luis T. Aguilar,Igor Boiko,Rafael Iriartestudies of integrated digital networks (IDN) for telephony and that studies leading to an Integrated Services Digital Network (ISDN) were needed. Some conceptual principles to guide the studies provided for:
pus840
发表于 2025-3-29 15:42:00
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繁荣中国
发表于 2025-3-29 20:58:00
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Coronation
发表于 2025-3-30 00:31:32
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intoxicate
发表于 2025-3-30 05:52:17
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