#apt-get install zaptel

zaptel         zaptel-source

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  fxload
The following NEW packages will be installed:
  fxload zaptel zaptel-source
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 1460kB of archives.
After this operation, 2519kB of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://10.0.35.1 lenny/main fxload 0.0.20020411-1.1 [14.7kB]
Get:2 http://10.0.35.1 lenny/main zaptel 1:1.4.11~dfsg-3 [299kB]
Get:3 http://10.0.35.1 lenny/main zaptel-source 1:1.4.11~dfsg-3 [1146kB]
Fetched 1460kB in 0s (7525kB/s)
Selecting previously deselected package fxload.
(Reading database ... 26276 files and directories currently installed.)
Unpacking fxload (from .../fxload_0.0.20020411-1.1_i386.deb) ...
Selecting previously deselected package zaptel.
Unpacking zaptel (from .../zaptel_1%3a1.4.11~dfsg-3_i386.deb) ...
Selecting previously deselected package zaptel-source.
Unpacking zaptel-source (from .../zaptel-source_1%3a1.4.11~dfsg-3_all.deb) ...
Processing triggers for man-db ...
Setting up fxload (0.0.20020411-1.1) ...
Setting up zaptel (1:1.4.11~dfsg-3) ...
Zaptel telephony kernel driver: FATAL: Module ztdummy not found.
Setting up zaptel-source (1:1.4.11~dfsg-3) ...