You could download the manual from :
You need to click on ' Download your PANASONIC KX-TG5521 user guide or user manual.Once clicked, a new browser window would open.You have to rate all the 4 questions.Once done, you need to click on ' Download the user guide '. Once clicked, you have to enter the correct string and you could download the manual.
You need to have acrobat reader to view the file.
In case, if you are still unable to download, revert and i would be able to upload the same in any of the free uploading sites.
Let me know,if needed further assistance.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!