Feature calculations
4-3
Calculations with Charge Account for CDR
The receiver holding time for outgoing calls changes from 14.1 seconds to
20.8 seconds.
Apply this change to (2) and (3) in Method 1 and (3) in Method 2 to
determine DTR requirements for a system with the charge account for CDR
option.
The following is assumed:
-
50% of the Digitone outgoing calls require charge account.
-
The average number of SSP digits is 2 (maximum is 4).
-
The average number of digits in the account number is 10 (range is 2
to
23 digits).
-
The average receiver holding time is 13.4 seconds. See Table e-7.
System engineering 553-3001-l 51
C.