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Quantizing Noise

  In any analog to digital conversion process, e.g., PCM, quantizing noise is the difference between the converted binary value and the actual analog signal's amplitude.

RAO

  Revenue Accounting Office

  RBHC

  Regional Bell Holding Company

  RBOC

  Regional Bell Operating company

  RBS

  robbed bit signaling

  Regional Bell Holding Company (RBHC)

  RBHC is one of 7 regional companies created by the AT&T divestiture to assume ownership of the Bell operating companies. They are Ameritech, Bell Atlantic, Bell South, NYNEX, Pacific Telesis, Southwestern Bell and US West.

  Repeater

  In digital transmission, a repeater is equipment that receives a pulse train, amplifies it, retimes it, and then reconstructs the signal for retransmission. In IEEE 802 local area network (LAN) standards, a repeater is essentially two transceivers joined back to back and attached to two adjacent LAN segments. See transceiver.

  RFC

  request for comment

  RFE

  Request for Engineering

  RFI

  radio frequency interference

  RFP

  request for proposal

  RF

  radio frequency

  Routers

  In IEEE 802 local area network (LAN) standards, routers are devices that connect autonomous networks of like architecture at the network layer (layer 3). Unlike a bridge which operates transparently to communicating end-terminals at the logical link layer (layer 2), a router reacts only to packets addressed to it by either a terminal or another router. Routers perform packet (as opposed to frame) routing and forwarding functions; they can select one of many potential paths based on transit delay, network congestion or other criteria. How routers perform their functions is largely determined by the protocols implemented in the networks they interconnect.

  RSU

  remote switching unit

  RBOC - Regional Bell Operating Company. In December 1983, a federal judge ordered AT&T to divide their 22 telephone companies into seven regional operating companies. The United States Department of Justice placed several restrictions on the RBOCs: they were not allowed to provide long distance, equipment manufacturing, or information services.

  RED - Rural Economic Development. A program administered by TDS Telecom and other phone companies which includes advocating for rural development funding at the Federal and State levels. This program is designed to support local companies' efforts with economic development projects in their communities.

  Redundant Connectivity - A system of backup connections that ensures the network will continue functioning even if a problem is encountered on one of the connections.

  Router - Highly sophisticated systems that connect local area networks (LANs).

  RUS - Rural Utilities Service. The RUS is an agency of the United States Department of Agriculture. It's a source of financing and technical assistance for rural telecommunication systems.
关键字:电信专业英英词典
生词表:
  • conversion [kən´və:ʃən] 移动到这儿单词发声 n.转化;变换;皈依 四级词汇
  • holding [´həuldiŋ] 移动到这儿单词发声 n.保持,固定,存储 六级词汇
  • ownership [´əunəʃip] 移动到这儿单词发声 n.所有权;所有制 四级词汇
  • southwestern [,sauθ´westən] 移动到这儿单词发声 a.西南的 六级词汇
  • transmission [trænz´miʃən, træns-] 移动到这儿单词发声 n.传送;播送;发射 六级词汇
  • network [´netwə:k] 移动到这儿单词发声 n.网状物 vt.联播 四级词汇
  • essentially [i´senʃəli] 移动到这儿单词发声 ad.本质上,基本上 四级词汇
  • adjacent [ə´dʒeisənt] 移动到这儿单词发声 a.接近的;紧接着的 四级词汇
  • frequency [´fri:kwənsi] 移动到这儿单词发声 n.频繁;周率 六级词汇
  • bridge [bridʒ] 移动到这儿单词发声 n.桥(梁);鼻梁;桥牌 四级词汇
  • logical [´lɔdʒikəl] 移动到这儿单词发声 a.逻辑(上)的 四级词汇
  • terminal [´tə:minəl] 移动到这儿单词发声 n.终点(站) a.末端的 四级词汇
  • packet [´pækit] 移动到这儿单词发声 n.盒 vt....打成小包 四级词汇
  • transit [´trænzit, -sit] 移动到这儿单词发声 n.通过;运行;运输 六级词汇


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