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  1. Local SIP and RTP ports for 2 phones

    We have few customers with just 2 to 3 phones using Grandstream GXP2130/2135 phones. Both phones are in a Ring Group for incoming calls. We are not able to put an SBC due to cost reasons so using STUN. Everything was working OK until now where the 2nd phone doesn't ring. The Local SIP Port of...
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