Hi, I have the same problem but after dpkg-reconfigure I get this:
Loading new asl-dahdi-linux-2.11.1 DKMS files...
First Installation: checking all kernels...
Building only for 4.1.6-voyage
Building for architecture i386
Module build for the currently running kernel was skipped since the
kernel source for this kernel does not seem to be installed.
root@panelpc:~# dpkg --list | egrep -i --color 'linux-image|linux-headers'
ii linux-headers-4.1.6-voyage 17.2-1 i386 Header files related to Linux kernel, specifically,
ii linux-image-4.1.6-voyage 17.2-1 i386 Linux kernel binary image for version 4.1.6-voyage
73 Marco IW0RED