TONE-BD (Tone-Clock Circuit)
Issue 1 May 2002
8-1661
555-233-143
Figure 8-98.
Duplex-Reliability Configuration
High-Reliability Configuration
The high-reliability configuration shown in
duplicated control network, and duplicated IPSIs in the IPSI-connected port
networks. With this configuration, every IPSI-connected EPN must have
duplicated IPSIs. The control network is duplicated so that a single fault in the
control network, such as a bad Ethernet switch, won’t bring the whole system
down. The non-IPSI-connected port networks have unduplicated Tone-Clock
boards. Each EPN’s Tone-Clock circuit is active for both tones and clock signals
for its port network.
EI
EPN 3
Server A
Server B
IPSI
EI
EPN 2
IPSI
EI
EPN 1
Control Network A
Bearer Network
T/C
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...