112 Memory calculations
Note
19 : Each DCHI consists of the following unprotected data blocks:
1. DCH U BLOCK = 43 words
44forR13andR14
_
47
for R15
2. Output request buffers = 5 x
#
of OTBFs
3. Output buffer = 261 words
4. Input buffer = 261 words
5. Unprotected call reference table = 2 + M
6. Unprotected message link table =
-
1 + M
M is computed as follows:
(a) If PRI 111 nn is defined for the DCH link:
M=24x
(max
@IN)+
1)
(b) If PRI 111 nn is not defined and the backup D-channel is defined
for the DCH link:
M=24x
2
(c) If PRI 111 nn and the backup D-channel are not defined:
M=24.
(d) If DCHI is in ISL mode:
M = maximum number of ISL trunks defined
(e) If DCHI is in SHARED mode:
M = (a) or
(b)
or (c) + maximum number of ISL trunks defined.
(f)
PR12 ONLY: unprotected data block of 65 words.
Note 20 : SIZE
(BG-lNPUT
AREA) (= 15)
+ SIZE
(BGW-WORK-ENTRY)
(= 26)
+ SIZE
(BGS.SCAN-ENTRY)
(= 25)
Total=66
Memory calculations 553-2201-151 Appendix 1
c.
I