$ sudo apt-get update
$ sudo apt-get install isdnvboxserver 

isdnvboxserver is installed in your system.

Make ensure the isdnvboxserver package were installed using the commands given below,

$ sudo dpkg-query -l | grep isdnvboxserver *

You will get with isdnvboxserver package name, version, architecture and description in a table

isdnvboxserver package basic information: