Overview

The incoming calls from the external caller are getting a busy signal "Decline (603)", and then the call fails.

Solution

To start with troubleshooting, we will need call samples. Open a ticket with Support, making sure to describe the issue and any symptoms you observe, and add at least two call samples in the following format:

• Calling From Number:
• Calling To Number:
• Date of call: dd/mm/yy
• Time of call: xx:xx am/pm (time zone)
• Result: ex: dropped call, garbled audio, etc.
• Trouble observed: Inbound / Outbound / Both directions

Based on the troubleshooting the Support team will either take action to fix the issue on our side, or reach back with findings and any next steps required from you.

Verification

Once the root cause is fixed, try to replicate the issue to confirm that it is no longer there.