[asterisk-users] Asterisk 1.8 Install Problem

[A.H. Jos]

Hi list,
I have a problem with installing Asterisk (under
https://wiki.asterisk.org/wiki/display/AST/Asterisk+Packages):

sudo apt-get install asterisk-1.8
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'asterisk' instead of 'asterisk-1.8'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 asterisk : Depends: asterisk-core-sounds-en-gsm (>= 1.4.21) but it is not
going to be installed
E: Broken packages

Thank you for your help
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