User Manual

Software descrIption
Nortel Networks Confidential
4–12
PE/DCL/DD/0063
411–9001–063
Standard 12.07/EN September 2000
GSM/BSS V12
4.2.2.1 Defense
The BCF contains several defense mechanisms:
paired units operating in active/standby mode:
• two synchronization boards (SYNC)
• two gateway boards (GTW)
• two control and switching boards (CSWM). In order to provide switching in
warm duplex mode, the standby chain is updated in real time.
redundant units:
• one DSC board can be reserved for redundant use
• one PCM interface bord can be reserved for redundant use.
4.2.3 CBCF software functions
CBCF Software is based on a COAM software architecture, which is composed of
three main parts:
common software for various BTS products
• OS Kernel
• O&M Kernel
BTS–specific software dedicated to a BTS product
• OS–specific
• O&M–specific
slave managers
The COAM architecture is shown in Figure 4–3.
The CBCF software manages the following O&M functions:
PCM management
configuration and supervision management
software management
synchronization management
test management
duplex management