Call routing procedure for incoming calls

For incoming calls, the telephone network exchange removes the prefix from the number dialed (destination number). Therefore, the LANCOM only receives the number itself, which may be treated differently depending on the source:

With the altered number, the Call Manager begins to search the call routing table from top to bottom. If the Call Router cannot find a matching entry there, the call is forwarded directly to the internal number:

  Remote site dials Call router receives Assigned via Number in use Correct call route Destination line
1 0 123 456 789 456 789 internal destination number for SIP line 11 None Internal
2 0 123 555 555 1 555 555 1 ISDN mapping 11 None Internal
3 0 123 555 555 2 555 555 2 ISDN mapping 12 None Internal

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