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SIP trunk problem on UC520

renatorados
Level 1
Level 1

Hello. I have a problem with SIP trunk on UC520. Actually I can make a call but I cannot hear anything and no one can`t hear me.

I`m using a simple SIP provider with user name, password on 5060 port. Preferred voice codec is G711ulaw  Can any one know what can cause this problem? Thanks in advance.

 

1 Reply 1

saif musa
Level 4
Level 4

Check if there is any firewall process befor or after your UC520, as long as you can make a call and there is no voice streaming then it's something related to RTP streaming.

 

Regards

 

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