Hi,
Both IP PBX and VoIP Gateway can be connected using IP. So you don't
need any optional cards. Make sure both device SIP enabled.
Are you using Briker as IP PBX ?
What is your VoIP Gateway ?
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What's new? playSMS 0.9.4-svn, Banjar 0.8.1, Briker 1.0.2
VoIP Rakyat: +62 188 1001 20001