If you enable the call waiting function,Now the gateway working like belows:
You have a call from cellphone 1 to Gateway gsm port 1(Cellphone 1
>Softphone),the call have been established;
Now you have another cellphone 2 call in the gateway,your softphone will get an waring tone.Now if your Cellphone 1 hangup,the call will coming to softphone!
If you have other questions,please let me know.My contact info be shown as below:
Thank you for your answer.And isn't it possible to see who is calling while in first call? Such function is working pretty well with chan_dongle. The thing is that the line is almost always busy and I have to get the phone numbers of calls which were missed and write them to the database, so I can call them back when later.