
262 Chapter 24 Dialing plans
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• If the call is from (ETSI-QSIG, MCDN, NI, DMS100, DMS250) and tagged as
Private/Subscriber, the system prepends the Private access code, if the dialing plan is UDP.
• If the call is tagged as Unknown/Unknown or Private/Unknown (ETSI-QSIG, MCDN, N1,
DMS100, DMS250 trunks), no access code is added.
• For all other call types, the system truncates the trailing digits to the Public Received #
Length. (Go to step 4)
Private calls:
• If the call is tagged as Private/Subscriber or Private/UDP, the system prepends the Private
access code.
• If the call is tagged as Private/CDP, no access code is added.
3 The system tries to match the first digits of the dial string to a destination code. If the digits
match, the dial string is routed out of the system.
4 If the system cannot match the first digits to a destination code, the system tries to match the
dial string to a target line (Public or Private Received Number). If the dial string does not
match any target lines, the call is routed to the prime set for the line.
Figure 84 illustrates the incoming call processing.
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