Nortel DMS-100 Series Maintenance Manual page 82

1-66 Maintenance overview
Dynamic data update
A dynamic data update occurs on an continuous basis. Changed data in the
active unit is updated in the inactive unit. Dynamic data updates include the
following information:
When the bulk transfer of critical data is complete, communication
continues between the mates. Information continues to flow from the active
unit to the inactive unit. This flow of information is an ongoing data update.
As these data change, the inactive unit is updated. The inactive unit is
updated to maintain the ability to take over call processing from its mate if a
switch of activity (SWACT) occurs.
The following table lists critical dynamic data transferred to the inactive
unit. The active unit sends this data to its mate. The data is sent in bulk,
then on a continuous basis, as data in the active unit change.
Critical dynamic data
Dynamic data
Call data
Terminal status
Port status
DS-1 maintenance
P-side node status
Protection switching
Nailed-up connections
297-8231-550 Standard 09.01 August 1998
RCS status (in-service or busy)
FSR codes
subscriber states
channel reassignment
port statuses
DS-1 link information
Condition for change
Call established or disconnected.
Terminal (line or trunk) put into or
taken out-of-service.
P- or C-side port change in state
(open or close) is requested.
Maintenance or data synchronization
reporting over DS-1 links is enabled or
disabled.
P-side node (RCS) is busied or
returned to service.
Protection switching is enabled,
disabled, switched, or unswitched.
P-side to P-side nailed-up connection
for special services is established or
taken down.