（单词翻译:单击）
RAO
Revenue Accounting1 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 divestiture2 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, amplifies3 it, retimes it, and then reconstructs the signal for retransmission. In IEEE 802 local area network (LAN) standards, a repeater is essentially4 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 autonomous5 networks of like architecture at the network layer (layer 3). Unlike a bridge which operates transparently6 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 transit7 delay, network congestion8 or other criteria9. How routers perform their functions is largely determined10 by the protocols11 implemented12 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 restrictions13 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.
Redundant14 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 telecommunication15 systems.
