3. Configure Index #2 to manipulate destination number of IP calls received from ITSP-B.
The phone number of calls received with prefix 0200 (i.e., from ITSP-B) are removed
except for the last four digits:
• 'Destination Prefix': enter the prefix "0200".
• 'Source Prefix': enter the asterisk (*) symbol to indicate all sources.
• 'Number of Digits to Leave': enter "4" to leave only the last four digits.
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