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- The ISDN telephone with the MSN 12345 calls the target subscriber with the phone number +49240598765.
Trace analysis:
1) The ISDN telephone initiates the outbound call and sends a SETUP to the LANCOM router. The SETUP indicates the establishment of the ISDN connection.
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The following important parameters are included in the SETUP :
The following important parameters are included in the SETUP:
- NT-1: The packet was received or sent on the interface ISDN-1. This interface works in NT mode.
- RX: This is an inbound packet.
- Call reference value: That number represents a unique identifier for the call flow on the ISDN. You can find the ISDN call flow in the trace by searching for the complete string (Call reference value: 1).
- Calling party number: This is the number of the calling phone (in this example the 12345).
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| Info |
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For more information on the Call routing table, see this knowledge base article . |
5) The remaining digits of the target number are sent in further INFORMATION packets.
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