Ported-In Call Processing - Cisco BTS 10200 Softswitch Manual

Chapter 2 Routing

Ported-In Call Processing

This section provides a detailed description of the Cisco BTS 10200 Softswitch routing and call flow for
ported-in call processing calls. Refer to
processing call routing flow while reviewing the following detailed step-by-step ported-in call
processing call routing flow. Note that in
Standards Institute (ANSI)/North America; for International Telecommunication Union (ITU) local
number portability (LNP), the logic is different. For a complete explanation of the call processing logic
for ITU LNP, refer to the ITU Local Number Portability Feature Module.
A ported-in call is received. If a query has already been performed (e.g., Forward Call Indicators (FCI)
Step 1
is set to "number translated", then a query is not performed in the Cisco BTS 10200 Softswitch. Proceed
to Step 7.
The office code is not assigned to the Cisco BTS 10200 Softswitch.
Step 2
Determine if the office code is in the ported-in office code table. If the office code is in the ported-in
Step 3
office code table, proceed to Step 4. if the office code is not in the ported-in office code table, perform
normal call processing.
Step 4 Determine if the in-call agent flag is set. If the in-call agent flag is set, proceed to Step 5. If the in-call
agent flag is not set, the Cisco BTS 10200 Softswitch will perform an LNP query. Please note that a
query is not performed if it has already been completed on a previous switch.
Determine if the subscriber is included the dn2subscriber table. If the subscriber is included in the
Step 5
dn2sunscriber table, proceed to Step 6. If the subscriber is not included in dn2subscriber table, proceed
to Step 7.
Determine if the LNP trigger flag is set. If the LNP trigger flag is set, the Cisco BTS 10200 Softswitch
Step 6
will perform an LNP query and port out the call. If the LNP trigger flag is not set, the Cisco BTS 10200
Softswitch will check the status field to determine if a LNP trigger has been assigned and will port out
the call or terminate the call to the subscriber. Please note that a query is not performed if it has already
been completed on a previous switch.
Alternately, if dn2subscriber status = PORTED-OUT, or LNP-TRIGGER = Y an LNP query is
performed, and depending upon the result of the query (whether or not an local routing number (LRN)
is found), the call may be routed to a ported-in DN, routed out to a DN ported-in to another switch, routed
in or out if the DN is not ported at all, or the call may fail if routing is not possible.
Check the destination table for the subscriber information. Based on the destination table information,
Step 7
the Cisco BTS 10200 Softswitch will route the call or issue a subscriber terminator, release the call, and
play the released call announcement. As part of routing the call, the Cisco BTS 10200 Softswitch will
perform an LNP query and , if necessary, port out the call. Please note that a query is not performed if
it has already been completed on a previous switch.
OL-8001-10
Figure 2-16 for visual representation of the ported-in call
Figure 2-16 the call flow logic applies to American National
Cisco BTS 10200 Softswitch Dial Plan Guide, Release 4.5.x
Call Types
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