Avaya S8700 Maintenance Manual page 1673

IPSV-CTL (Ipserver Interface Control)
Active IPSI has a faulty Archangel.
1. PKT-INT detects dead EAL and reports it to software.
2. Software interchanges PKT-INT.
3. Software interchanges Archangel.
4. Software interchanges Tone-Clock.
Both IPSIs are healthy (planned interchange sequence).
1. Software interchanges Tone-Clock.
2. Software interchanges PKT-INT.
3. Software interchanges Archangel.
If both of an PN's IPSIs have faulty Tone-Clock, then the PN is out of service.
If both of an PN's IPSIs have faulty components (but at least one has a good
Tone-Clock circuit), then the PN "falls back" to EI-EAL mode of operation, where:
The PN's EI provides Archangel functionality
Another PN's IPSI provides PKT-INT functionality
For details, see
The following tables show the only valid combinations of IPSIs and EIs providing
Tone-Clock, PKT-INT, and Archangel functions. Any combination not shown here
is invalid.
Table 8-370. IPSI A is Active
Function
Tone-Clock
PKT-INT
Archangel
555-233-143
''EXP-INTF (Expansion Interface Circuit Pack)'' on page
IPSI A IPSI B
X
X
X
IPSI in
EI Another PN
Issue 1 May 2002
8-762.
8-951