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to bjutnetacad
呵呵,下面是摘抄的名词解释: PBX (private branch exchange) A digital or analog telephone switchboard located on the subscriber premises and used to connect private and public telephone networks.
Demarcation (or demarc) The juncture at which the CPE ends and the local loop portion of the service begins.It ofen occurs at a telecommunication closet.
这样说是不是更确切:PBX是demarc的其中一种?
Kang Liu
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Aug 9, 2007, 8:22:07 AM8/9/07
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