Telcobridges - Session Border Controllers
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Telcobridges - Session Border Controllers

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SYNC_DROP call logs

Telcobridges - Session Border Controllers :: Troubleshooting :: Troubleshooting

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SYNC_DROP call logs Empty SYNC_DROP call logs

Post by Guest Wed Jan 20, 2021 4:43 pm

I would like to know what could be the reason(s) for an SYNC_DROP in call logs?

This morning I had 2 NAPs that had a lot of SYNC_DROP and I would like to understand why?

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SYNC_DROP call logs Empty Re: SYNC_DROP call logs

Post by Guest Wed Jan 20, 2021 5:02 pm

SYNC_DROP indicates that the call leg is no more present in toolpack_engine after re-synchronizing, and must thus be freed in the CAF (Customer Application Framework) application too.

If you do not have a SIP Proxy IP address on any NAP, the engine might be stopped working and the error can be seen regarding the NAPs that do not have SIP Proxy IP addresses.

So it is required to enter one of the IP addresses in the ACL to NAP SIP Proxy. It will still work and receive the calls from all the IPs even it is only receiving NAP for the calls. But leaving the NAP SIP proxy empty might cause a problem.

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