LBI-38965
C-2
Figure C.1 shows the architecture for a fault tolerant EDACS billing system.
RF
System
Console
Terminal
MIM
(Primary)
MIM
BCU
BCU
C
A
M
C
A
M
AREA
IMC
Console
Terminal
To StarGate
Primary
Downlink
Backup
Downlink
(Backup)
Figure C.1 - EDACS Billing Fault Tolerant Architecture
Redundant MIM processors are added to each RF System interface within the IMC. A duplicate CAM is added, which
connects to the redundant BCU/CAL and tape drive.
REDUNDANT OPERATION
The primary and redundant MIM processors operate in a hot standby configuration, i.e., once primary unit failure is
detected, the backup becomes the active processor with minimal disruption to calls in progress. The redundant CAM,
BCU/CAL and tape drive are operated as on-line mirror duplicates. This eliminates any changeover operation; in the event of
failure of one BCU/CAL, or its associated components; the remaining unit continues to operate and process call activity.
Содержание LBI-38965
Страница 34: ......
Страница 35: ...LBI 38965 A 1 APPENDIX A EDACS BILLING CDR FORMAT...
Страница 43: ...LBI 38965 B 1 APPENDIX B PHYSICAL CONFIGURATION DETAILS...
Страница 47: ...LBI 38965 B 5 Figure B 4 fv5310 Main Board...
Страница 48: ...LBI 38965 B 6 Figure B 5 fv5310 Mezzanine Card PORT 0 DTE WITH DCE PROVIDING RX AND TX CLOCKS IMC CAM INTERFACE...
Страница 57: ...LBI 38965 C 1 APPENDIX C FAULT TOLERANCE...