Memory calculations 105
Assumptions:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
The peak day traffic = 1.42 x ABSBH traffic for business offices.
All outgoing calls require authorization (worst case assumption).
An additional call register is required for 20 s to hold the
authorization code.
50% of outgoing calls use the charge account feature (worst case
assumption).
An additional call register is required for 20 s to hold the charge
account.
The additional holding time of the call register for CDR purposes is 5
seconds.
.
The average number of ports used in the multiple CDR ports
feature is 2.
A call register is required for each incoming ACD trunk.
The intra-office ration R = 0 (worst case assumption).
(10) The number of originating calls = the number of terminating calls.
(11) The blocking peak of the day traffic is PO.01.
(12) The average
NARVBARS
call takes 20 s to dial and 20 s to complete
outpulsing and delay for answer.
(13) The average holding time of a RAN is 15 s.
(14) The average Telset Message takes 6 s to dial and 20 s to complete
outpulsing and delay for answer.
(15) The average IMS call takes 8 s to dial, 15 seconds ringing and 40 s
with message attendant. During the busy hour, 60% of tenninating
calls are unanswered, of which 50% require IMS.
(16) A call register is required for active Ring Again call.
Memory calculations 553-2201-l 51 Appendix 1