106 Memory calculations
(17) Music Trunk holding time is 30 s.
(18) Average Call Park holding time is 1 min.
(19) Average holding time for New Flexible Code Restriction is 4 s.
(20) ESN Signalling Feature holding time is 15 s and 35% of calls need
signalling feature.
(21) The average IVMS call takes 8 s to dial, 15 s ringing, 10 s listening
to
greeting and 50 seconds leaving message. During the busy hour, 60%
of terminating calls are unanswered, of which 50% require IVMS
(R4-5).
(22) Individual Hold call holding time is 30 s (R4-5).
Note 9 : Size per item for Call Park
k + ceiling (s/16), for
UCALL-PARK-BLOCK
where:
s = number of System Park DNs per customer
k=2
UCPRKBLGCKLENGTH
(1 .O)
FREE-DNJNDEX
(0.5)
NUM-SYS-PRK-USED
(0.5)
Memory calculations 553-2201-151 Appendix 1