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Table 17-
Scenario 6: Parameter field mapping for PRI to ISUP to ISUP
Calling user/network
Note: A fast answer scenario would also behave in the same manner as this
scenario.
Migration strategy
To convert the switches from MCI16 or MCI17 to MCI18, the office
parameter ATP_PROGRESS_IND in the OFCOPT table is set to N when the
ONP is complete for MCI18. The parameter remains set to N until all
switches convert to MCI18. At that time, the office parameter changes to Y.
The office parameter allows you to turn the feature off and on by changing
the datafill. Until all switches convert to MCI18, the code for patch BAV40
needs to be active.
For MCI18, Nortel Networks will support both the patch and the feature
functionality to avoid any migration issues and help prevent the need to
convert all switches at once.
To turn the feature on, proceed as follows:
This process transports the progress indicator in a PRI to PRI scenario
without the location mapping.
Feature impact
The restrictions and limitations of this feature are as follows:
Change the setting of ATP_PROGRESS_IND to Y.
Enter the datafill into the default action of the CONNECT message in
ISDNPARM to ATP.
A progress indicator received in a Q.931 ALERTING, DISCONNECT,
or SETUP message does not transport through the network in the ATP.
A progress indicator received in a Q.931 CONNECT message transports
through the ATP of an ISUP ANM. To transport this progress indicator,
you must enter the datafill with a default action of ATP for the Q.931
CONNECT message in the ISDNPARM table
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Pri Progress Indicator Transport 17-9
Network
M=1 terminating
access ISDN
ATP carries progress
indicator
—end—
(continued)
Called user/network
M=1 terminating
access ISDN
ATP carries progress
indicator
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