We have a SIP trunk with HFO Telekom in Germany. We can do 2 simultaneous calls outbound but unlimited inbound and I've set the value for "Number of SIM Calls" to 2. We use this trunk as a company hotline number and in our tests, when two outbound calls are made, the next person calling inbound gets a busy signal. How can I configure this that 2 outbound calls are possible but unlimited inbound? Should I set the value for "Number of SIM Calls" to 200? Thanks for your help.