Hello @azimullahhabibi
First, it's possible that there is a routing issue between the CME router and the ASA in the main office. You mentioned that you are unable to ping from the CME router to the ASA, so it's possible that there is a misconfiguration or a missing route.
- Verify that the interface on the CME router connected to the switch is up and configured correctly.
- Verify that the interface on the ASA in the main office connected to the CME router is up and configured correctly.
- Check the routing table on both the CME router and the ASA to ensure that there are no missing or incorrect routes.
- Verify that the firewall rules on the ASA are not blocking the traffic between the CME router and the ASA.
After that we can follow the debug.
Best regards
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Ben