Dear ALL:
Question: How can UA1 know UA2 under SER2 if UA1 registers to SER1 sip server(domainA.com) and another UA2 registers to SER2 sip server(domainB.com) ?
UA1 ==> SER1(domainA.com) <== ?? ==> SER2(domainB.com) ==> UA2
Is there any middleware like freeradius or mysql to let UA1 know the location of UA2 ?
Thank you for your kind to answer my question.
Best Regard.
Charles