CCITT Rec. E.600 – TERMS AND DEFINITIONS OF TRAFFIC ENGINEERING
Introduction
List of  terms
1 General theory
    1.1 communication
    1.2 connection
    1.3 resource
    1.4 user
    1.5 telecommunications traffic; teletraffic
    1.6 observed traffic
    1.7 poisson traffic; pure chance traffic
    1.8 peakedness factor
    1.9 smooth traffic
    1.10 peaked traffic
    1.11 traffic volume
    1.12 erlang
    1.13 bid
    1.14 seizure
    1.15 idle (state)
    1.16 busy (state)
    1.17 release
    1.18 holding time
    1.19 blocked mode of operation
    1.20 delay mode of operation
    1.21 call congestion
    1.22 time congestion
    1.23 waiting time ; queuing time
2 Calls
    2.1 call
    2.2 call intent
    2.3 call demand
    2.4 call attempt
    2.5 first call attempt
    2.6 repeated call attempt; reattempt
    2.7 call string
    2.8 blocked call attempt
    2.9 abandoned call attempt
    2.10 successful call attempt; fully routed call attempt
    2.11 completed call attempt; effective call attempt
    2.12 successful call
    2.13 completion ratio
    2.14 answer seizure ratio (ASR)
    2.15 answer bid radio (ABR)
    2.16 calling rate
    2.17 dialling-time
3 Circuits
    3.1 circuit
    3.2 trunk circuit
    3.3 one way; unidirectional
    3.4 two way ; bidirectional
    3.5 circuit group
    3.6 circuit subgroup
    3.7 first choice circuit group
    3.8 high usage circuit group
    3.9 final circuit group
    3.10 fully provided circuit group
4 Grade of service
    4.1 grade of service (GOS)
    4.2 quality of service variable
    4.3 dial-tone delay
    4.4 post-dialling delay
    4.5 answer-signal delay
    4.6 incoming response delay
    4.7 exchange call set-up delay
    4.8 through-connection delay
    4.9 internal blocking
    4.10 external blocking
5 Traffic engineering
    5.1 busy hour
    5.2 average daily peak hour traffic
    5.3 time consistent busy hour
    5.4 day to busy hour ratio
    5.5 traffic carried
    5.6 traffic offered
    5.7 effective traffic
    5.8 overflow traffic
    5.9 blocked traffic
    5.10 lost traffic; abandoned traffic
    5.11 suppressed traffic
    5.12 origin
    5.13 destination
    5.14 traffic relation
    5.15 traffic matrix
    5.16 originating traffic
    5.17 terminating traffic
    5.18 internal traffic
    5.19 incoming traffic
    5.20 outgoing traffic
    5.21 transit traffic
    5.22 traffic distribution imbalance
    5.23 route
    5.24 traffic routing
    5.25 call routing
    5.26 alternative route ; alternate route
    5.27 network cluster
    5.28 equivalent random traffic
ALPHABETICAL INDEX