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The engineering procedure is as follows:
1
Calculate the attendant traffic (Ta) generated at the Remote site by using
this formula: Ta = τ x AWT/100 CCS.
τ = the number of calls per hour in the Remote site that require an
attendant
AWT = attendant work time
2
Select the appropriate table
specified grade of service.
3
Select the appropriate column in the table according to the attendant
work time.
4
Select from the chosen column a number (T) that is greater than or equal
to the value Ta that was determined in step 1.
Example:
Average speed of answer
Average RLT delay
Attendant work time (AWT)
Attendant calls/hours in the Remote site (Ê) = 500
Then
Ta = 500 x 20/100 CCS
Ta = 100 CCS
Table 3
is chosen because it meets the given grade-of-service values. From
this table, in the AWT 16–20 column, the value T of 120 CCS is selected (T
CCS ≥ Ta CCS). For the value T = 120 CCS, the table shows that six RLT
circuits are required for this particular application.
Centralized Attendant Service
Engineering information
(Tables 3
through 20) according to the
= 2 s grade of service
= 2 s
= 20 s
Description and engineering
Page 29 of 64
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