Call usage rates
Issue 3.4.1 June 2005
149
Alternatively, 100 Erlangs of total station usage could also hypothetically correspond to 35
Erlangs of intercom call usage, 10 Erlangs of inbound PSTN usage, and 20 Erlangs of outbound
PSTN usage. Using the procedure from the preceding example to verify this:
●
Intercom station usage = 70 Erlangs (2 Avaya stations per call x 35 Erlangs of intercom
call usage)
●
Inbound station usage = 10 Erlangs (1 Avaya station per call x 10 Erlangs of inbound call
usage)
●
Outbound station usage = 20 Erlangs (1 Avaya station per call x 20 Erlangs of outbound
call usage)
The 70 Erlangs that are associated with intercom calls, plus the 10 Erlangs that are associated
with inbound calls, plus the 20 Erlangs that are associated with outbound calls total 100 Erlangs
of station usage.
However, suppose that once again the station usage is 100 Erlangs. Assuming that there is no
tandem traffic, this cannot correspond to 10 Erlangs of intercom call usage, 20 Erlangs of
inbound PSTN usage, and 30 Erlangs of outbound PSTN usage.
●
Intercom station usage = 20 Erlangs (2 Avaya stations per call x 10 Erlangs of intercom
call usage)
●
Inbound station usage = 20 Erlangs (1 Avaya station per call x 20 Erlangs of inbound call
usage)
●
Outbound station usage = 30 Erlangs (1 Avaya station per call x 30 Erlangs of outbound
call usage)
The 20 Erlangs that are associated with intercom calls, plus the 20 Erlangs that are associated
with inbound calls, plus the 30 Erlangs that are associated with outbound calls total 70 Erlangs,
leaving 30 Erlangs of unaccounted station usage. This is a sign that the parsing of call traffic
into intercom, inbound, and outbound might have been done erroneously. One possible
explanation for the extra 30 Erlangs of station usage is adjunct traffic, such as stations that are
connected to voice mail, providing that 30 Erlangs of voice mail calls makes sense in the model.
The bottom line is, regardless of what model is used to parse call traffic into its various
components, one must be able to reconcile the overall station usage with the overall call usage.
Specifically, if there is no tandem traffic, the following relationship must hold:
Having established that point, several examples describe some methods for populating the COI
matrix. For the sake of continuity, all of the examples are built upon
Example 1
.
SUR
2
intercom CUR
×
(
)
inbound PSTN CUR
outbound PSTN CUR
+
+
=
Содержание Application Solutions
Страница 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Страница 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Страница 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 74: ...Avaya Application Solutions platforms 74 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Страница 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 214: ...Voice quality network requirements 214 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 239: ...Reliability Issue 3 4 1 June 2005 239 Figure 69 S8700 Media Server in a high reliability configuration ...
Страница 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Страница 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 350: ...Implementing Communication Manager on a data network 350 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Страница 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...