Avaya 555-245-600 사용자 설명서

다운로드
페이지 378
Call usage rates
Issue 6 January 2008
191
 
, an
, respectively, for the Uniform Distribution model based on relative SUR 
are:
Example 3: Empirical approach for existing systems
Another possible means of populating the COI matrices exists for established systems. In such 
cases, the necessary information can be read from traffic reports. This method is particularly 
useful for customers who are considering an upgrade from their current equipment.
Expanded COI matrices
So far, all the discussion pertaining to COI matrices has focused on a macroscopic view of sites. 
In particular, all the COI matrices presented have dedicated one cell for each pair of sites. In 
preparation for 
on page 198, it is useful to partition each such cell into 
collections of smaller cells that describe the call flows between different communities of 
endpoint types within the sites.
One possible partitioning scheme for each site is to create the following three general endpoint 
categories:
IP endpoints
Circuit-switched endpoints
PSTN trunks
Inbound CUR to Site i 
 total station usage in Site i 
total station usage
------------------------------------------------------------------
total inbound CUR
(
)
×
=
Outbound CUR from Site i 
 total station usage in Site i 
total station usage
------------------------------------------------------------------
total outbound CUR
(
)
×
=
Intercom CUR from Site i to Site j 
 total station usage in Site j 
total station usage
------------------------------------------------------------------
total intercom CUR
originating in Site i 
×
=