JM170

Hello Riogrande, the software that I use is 3CX System, it is a free license PBX, it is software for Windows and it works perfectly, I use it as a SIP telephone exchange. a greeting

Hello, I have installed the 3CX system PBX and I have connected a VTO2000A with the SIP v 1.0 on the network. As a SIP client I have Zoiper as a softphone and also one smartphone. Everything works fine except that from time to time when they call the VTO I can not hear what they say in the VTO, however he can hear what I say from the softphone. Where is the problem regards