Specifications

Reference Guide 3-77

System Configuration and Operation CPU Card Redundancy

Figure 3-61. Typical Redundant-Power Supply System Main Screen

3.21 CPU Card Redundancy

CPU card redundancy is valuable because the CPU card is essential to system operation. CPU

redundancy is supported in both cross-connect and enhanced bus-connect systems using two

CPU-3 XCON (8801) or CPU-3 RCON (8804) models respectively. The CPU card in slot C2

will be the redundant card for the CPU RCON 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.

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