routing indicator

In telecommunication, the term routing indicator (RI) has the following meanings: 1. A group of letters assigned to indicate: (a) the geographic location of a station; (b) a fixed headquarters of a command, activity, or unit at a geographic location; and (c) the general location of a tape relay or tributary station to facilitate the routing of traffic over the tape relay networks. 2. In a message header, an address, i.e., group of characters, that specifies routing instructions for the transmission of the message to its final destination. Routing indicators may also include addresses of intermediate points.

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reframing time
regeneration
relative transmission level
release time
reliability
remote access
remote call forwarding
remote operations service element protocol
repeater
repeating coil
reproduction speed

reradiation
resolution
resonance
response
response time
responsivity
restoration
return loss
rf power margin
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ringer equivalency number
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round trip delay time
rubidium standard
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secondary frequency standard
second dialtone
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security kernel
security management
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sensitivity
separate channel signaling
serial access