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17-6 Pri Progress Indicator Transport
Table 17-
Scenario 3: Parameter field mapping for PTS to ISUP to PRI
Calling user/network
n/a
no mapping applied
n/a
no mapping applied
Scenario 4: PRI-to-ISUP-to-PRI
The originator for this scenario is a PRI trunk. This originator interworks
with an ISUP trunk, which interworks with a PRI terminator.
297-2521-106 Standard 23.01 March 2001
Network
ACM
backward call
indicators
DC=01 subscriber free
I=0 no interworking
encountered
K=1 uses ISUP end to
end
M=1 terminating
access ISDN
ACM
backward call
indicators
DC=00 no indication
I=0 no interworking
encountered
K=1 uses ISUP end to
end
M=1 terminating
access ISDN
ATP carries progress
indicator
—end—
Called user/network
ALERTING
no progress indicator
PROGRESS
progress indicator
progress
description=#8, in-band
information or an
appropriate pattern is
available
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