Page102 of 544 Provisioning
553-3011-100 Standard14.00 January 2002

Detailed calculati on: Method 2

This method is used when incoming Digitone trunks are included in the
system. This method uses the same assumptions as Method 1, with the DTR
holding time assumed to be 2.5 seconds for a DID call. Follow the procedure
below for detailed calculation Method 2.
1Calculate intra-office and outgoing Digitone calls as shown in step 1 of
Method 1:
DID calls = 100 x Digitone station traffic (in CCS)
call holding time in seconds
2Calculate total DTR traffic:
DTR traffic = 1.3 x [(6.2 x intra) + (14.1 x outgoing)] + (2.5 x DID calls)
100
3See Table30, “Digitone receiver (DTR) requirements — Poisson 0.1
percent blocking,” on page126 and use the answer from step 2 to
determine the number of DTRs required.
Calculating total system load
Total the line, trunk, console and DTR load for each customer to get the total
load figure for each customer, two-year and five-year intervals. Enter this
figure into “Worksheet B: Total load” on page137.
Calculating number of loops required
Loop provisioning is not required with Option 11C since each card is
automatically assigned to its own loop. By default, the system is non-
blocking.
Each cabinet can house up to 10 Intelligent Peripheral Equipment (IPE) cards.
Each Option 11C Mini chassis can house up to 4 IPE cards.