SIP trunk PSTN error

[Sandi22]

Hello ! 

I am having a problem with a SIP trunk , i can make calls to outside PSTN after i remove and reinsert the static route to the SBC provider . The connection works for a limited amount of time , then i receive 503 service unavailable so i always have to do the same process of deleting and reinserting . From outside i can receive calls permanently without any problem .

Thanking in advance for further advice !!

[Olamideharrison]

Bro it might be that not every SIP is compatible with every PBX system and even if they are, there may be licensing requirements causing issues for you

Also it could be If you’re experiencing inadequate audio call with your SIP trunking service, it could be the result of insufficient bandwidth, network issues or limitations to SBCs. There are several things that may be causing these issue which might be codec mismatch,latency,jitter or tbh If you haven’t upgraded in a while, simply call your internet provider to discuss upgrade options. This is a simple fix to your issue