Contents Telektronikk - Telenor
Contents Telektronikk - Telenor
Contents Telektronikk - Telenor
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UNIT/SINTEF exchange probably<br />
choose to do the easier routine work<br />
(mostly administration work which<br />
usually requires more use of the phone)<br />
in the last part of the day. We also believe<br />
that many professors (who constitute<br />
a large part of the users connected to<br />
the exchange) are more involved with<br />
lecturing during the first part of the day.<br />
As expected there are much fewer telephone<br />
calls during weekends. The 24hour<br />
profile shows a similar tendency,<br />
but the peak occurs later and the profile<br />
is less influenced by normal working<br />
Table 1 Overview of the combinations studied<br />
a Group 3 covers traffic to the address groups 1, 2, 7, and 8 (“inexpensive calls”)<br />
b Group 2 covers traffic to the address groups 3, 5, and 6 (“more expensive calls”)<br />
hours. The calls are not as concentrated<br />
and regularly distributed as on weekdays.<br />
Figure 2 does not show the differences<br />
between address groups. In order to register<br />
this we make some more analysis by<br />
dividing all outgoing calls into 3 groups:<br />
Outgoing traffic Number of calls Traffic (Erlang) Call holding time<br />
Total 24-hour periods and week 24-hour periods and week mean, st.dev. and histograms<br />
profile profile<br />
mean and st.dev. per weekday busy hour (for each weekday)<br />
24-hour periods profile of no. time consistent busy hour<br />
call attempts<br />
no. manually set-up calls<br />
1) Local mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
(within Trondheim) 24-hour periods profile (gr.3 a )<br />
2) Neighbouring counties mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile (gr.3)<br />
3) Domestic long-distance<br />
Total mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile (gr. 2 b )<br />
3a) Universities mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
(for each university) (for each university)<br />
Universities, fax mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
(for each university) (for each university)<br />
3b) Oslo - mean -<br />
3c) Oslo, neighb. counties - mean -<br />
4) International calls mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile<br />
5) Mobile telephone mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile (gr. 2)<br />
6) Paging meand and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile (gr. 2)<br />
7) Special services mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile (gr. 3)<br />
8) Toll-free numbers mean and st.dev. per weekday mean and st.dev. mean, st.dev. and histograms<br />
24-hour periods profile (gr. 3)<br />
Incoming traffic<br />
Total 24-hour periods profile of no. 24-hour periods profile -<br />
call attempts<br />
no. manual set-up call attempts<br />
121
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