Chapter 3 The Tariscope program
3.10 Telephone traffic measurement
3.10.2 Traffic applications
According to Recommendation E.503 the list of applications for which can be applied traffic analysis is enumerated in Table 3.10.
Table 3.10
|
Measurements basis |
Exchange dimensioning, planning and administration |
Network dimensioning, planning and administration |
Exchange performance monitoring |
Network performance monitoring |
Support to maintenance |
Network |
Traffic and marketing studies |
| Overall traffic | X | X | X | X | X | X | |
|
Circuit groups |
X | X | X | X | X | X | |
|
Subscriber |
X | X | |||||
|
Auxiliary units |
X | X | X | ||||
|
Control units |
X | X | X | X | |||
|
Common chanel signalling |
X | X | X | X | X | X | |
|
Call records |
X | X | X | X | X | X | X |
As you see call detail records (CDR) are used for all applications. Call accounting and billing systems work exactly with such information. However, it should be noted that a number of these applications can not get the full information only on the basis of analysis of CDR information. It determines by an absence of all required information. Not all PBXs (telephone exchanges) allow to log the internal calls, dialing time, time to answer, abandoned calls etc.
Most of users of telephone system, as a rule, use traffic analysis to detect the necessity to extend bandwidth of trunks or to decrease number of trunks if they are underloaded and as a result to save money.
Traffic measurement can be used to detect fraud. For this task you should collect statistics by traffic for one-two years per month, per day (work, weekend, holiday), per specific day period, etc. And if you detect the unusual traffic for a specific day period, you should analyze origins of traffic increase for identification of fraud.
Sometimes in contracts, which are concluded with telecoms service providers, restrictions on telephone traffic are set: no more 0,7 - 0,8 erlang per trunk and 0,1 - 0,15 erlang per subscriber line. In this case a company, which is an owner of PBX, also must trace traffic intensity.
For companies that have call centers, it also makes sense to constantly analyze the busy subscriber lines of the operators of the centers. The same task can be applied to companies that do not have a call center, but there are employees involved in receiving incoming calls. Estimating the workload of subscribers in the specified situations will allow to optimize their work.
