[App_rpt-users] Radio to Radio communication

Dear All, I am newbie to app_rpt. I have a basic question, I have searched about it, but I could not find an appropriate solution. I have two radios which works in different frequency bands. Both are connected to Asterisk using URI. Reverse Autopatch is working fine from PSTN to the both radios. I want to establish a call between the radios. My question is that "is is possible to configure app_rpt to act as a bidirectional bridge between two radios?", i.e., when radio 1 activates PTT, its TX audio is transferred to radio 2 and vice versa.  Any recommendation/answer would be appreciated. Thanks in advance.  -- Best Regards. Matteo.