SIP 2 - Can't find matching codec in SDP, service or option not implemented, unspecified

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there is incoming call but just notification, and showing this problem on zoiper when i try to call from browser to softphone.. while on zoiper log said :

Call failure: service or option not implemented, unspecified

when i try to call from softphone to browser got:

error 488-not acceptable here, bearer capability is not presently available

asked Nov 21, 2016 in Windows by Ahmad Fahmi Osman (140 points)  
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