Avaya S8700 Maintenance Manual page 2385

TONE-BD (Tone-Clock Circuit)
Figure 8-100. Critical-Reliability Configuration
Tone-Clock Interchange Strategy
There are three types of Tone-Clock interchanges:
Autonomous interchanges initiated as a part of maintenance software
strategy for the Tone-Clock or IPSI circuit packs.
Manual interchanges initiated by entering the set tone-clock or set
ipserver-interface command.
Firmware-initiated Tone-Clock interchanges
555-233-143
Server A
Control Network A
IPSI IPSI IPSI
EPN 1
EI EI EI
Bearer Network A
Server B
Control Network B
IPSI T/C
EPN 2 EPN 3
EI EI
Bearer Network B
Issue 1 May 2002
T/C
EI
8-1663