I was trying to install the asterisk subagent on ubuntu from .deb package. I ran the command 'sudo apt install netxms-agent-asterisk' and it finds the subagent but it gives the error "netxms-agent-asterisk : Depends: libexosip2-11 but it is not installable". I have tried install libexosip2-11 but it's not found. Any help would be appreciated.