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- May 3, 2011
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hi
just setup a grandstream 4004 in order to fax out via 3cx / SIP
using the little handset on the fax I can dial an internal extension and all works fine
however when we dial an external number, the other party phone rings and they hear me but we cant hear them.
extension assigned to grandstream is registered in 3cx
reset grandstream to factory and rebuilt and still get same results
any ideas ?
just setup a grandstream 4004 in order to fax out via 3cx / SIP
using the little handset on the fax I can dial an internal extension and all works fine
however when we dial an external number, the other party phone rings and they hear me but we cant hear them.
extension assigned to grandstream is registered in 3cx
reset grandstream to factory and rebuilt and still get same results
any ideas ?