- In
high and critical reliability R7 or later si systems, copies contents
of memory from the primary Switch
- Processing
Element (SPE) to a standby SPE, so that the latter can take over
immediately when the former fails
Two TN792 circuit packs required, one for primary control carrier
and one for standby
- You
can replace TN772 duplication interfaces with TN792s, but you
must replace them in pairs
- A
TN772 cannot communicate with a TN792
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