We recently purchased Dinstar DWG 2000C - 4G GSM Gateway, and we were unable to make it work properly.
We need a basic usage. This gateway had 3 SIM Cards/Channels which we registered as 3 SIP channels on asterisk - gsm0 to gsm2. That works.
When user calls asterisk, we want to be able to dial all these SIP channels. After first user responds to a call, other SIP channels (mobile phones) should stop ringing. The problem that we have is that as soon as the first line is connected, when the next user calls asterisk reply that ALL SIP lines are busy. This looks like some error in config, and I am posting our sip.conf and also extensions.conf. Hope that someone will be able to help.
PS: We are testing it on extension 8215
;--------------------------------- test 8215
exten => 8215,1,Answer
exten => 8215,n,Goto(astronew,s,1)
exten => s,1,Answer
exten => s,n,Set(VOLUME(TX)=0)
exten => s,n,Dial(SIP/gsm0/063263587&SIP/gsm1/062440209,m(astrocentar))
exten => s,n,Hangup()
So after one of these sip channels connects, all other channels are busy.
Thanks in advance.