I am having a requirement in one of our customers like, I will be having different voice gateways for Local and International Calls. When a international calls come in, it should not be transferred or conferenced with any PSTN calls, but only to internal extensions. Same case with Local PSTN calls also like these should be transferred or conference with only internal extensions, but not to ISD calls.
I am using only a single line phone.
Can anyone have any solutions to these requirement?