Specifications

Reference Guide
4-93
System Configuration and Operation CPU Card Redundancy
Figure 4-62. Typical Redundant-Power Supply System Main Screen
4.26 CPU Card Redundancy
CPU card redundancy is valuable because the CPU card is essential to system operation. CPU
redundancy is supported using two CPU-5 XCON (8803). The CPU card in slot C2 will be the
redundant card for the CPU XCON card in slot C1, but
only if they are both the same type.
A switch from one CPU card to the other is triggered by any of the following:
•
A software command issued by an operator
•
Removal of the active CPU card from the system
•
Failure or malfunction of the active CPU card
During a CPU redundancy switch over, disruptions to voice and data traffic are momentary
and traffic will recover automatically.
Figure 4-62 shows a System Main Screen with redundant CPU cards. The card in slot C1 is
active, and the card in slot C2 is redundant. To switch operation to the redundant CPU card,
press “
w
” to invoke the
cpusWtch
command from the bottom highlighted line of this screen.
The system prompts you with a yes/no confirmation prompt, as shown.
Node_1 | | 12-31-99 14:33
Slot Installed Status Slot Installed Status
PS1 OOS
C1 CPU XCON IF INTF+modem
C2 CPU XCON RDNT U1 ALR
P1 ADPCM-64 U2 E&M 4Wx8-6
P2 ADPCM-64 U3 FXS 2Wx8-9
P3 ADPCM-64 U4 FXO 2Wx8-9
W1 CSU+CSU U5 HSU 366x2
W2 CSU+CSU U6 OCU-DPx5
W3 CEPT+CEPT U7 FRAD-10
W4 CEPT+CEPT U8 SRU 232x10
F1 PS1 OOS R1 RINGER
F2 PS2
Alarms | Config | Del | accepT | Xcon | sYs| Logout | Oos | cpusWtch