无能的人
发表于 2025-3-26 22:37:06
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Permanent
发表于 2025-3-27 01:35:04
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NIL
发表于 2025-3-27 05:15:59
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可商量
发表于 2025-3-27 12:02:44
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FAST
发表于 2025-3-27 13:55:55
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nocturia
发表于 2025-3-27 21:09:25
ATM,X25, frame relay networks use transmission capacity only when there is traffic to send. However, like circuit switching, frame relay is transparent to the data communications protocol used and can switch traffic at relatively high speeds.
SEED
发表于 2025-3-27 22:28:55
Digital switching,smission techniques, although the way in which it has been implemented in practice makes use of the digital transmission facilities. This development is concerned with the use of digital computers to optimally configure the telecommunications network to obtain efficient user interconnection.
Popcorn
发表于 2025-3-28 05:32:05
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Myelin
发表于 2025-3-28 08:41:03
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创造性
发表于 2025-3-28 13:17:49
Book 1993mmunications infrastructure. This evolution is by no means complete and the next few years will see the emergence of a "Broad-band" ISDN as the next stage of evolutionary development. It is important to appreciate the evolutionary nature of the telecommunications infrastructure if one is to properly