Again, should be working, 'ppp ipcp dns request' should seed your router with Telkom's DNS servers?
BTW are you pinging from the router CLI or an attached PC?
Then I can only think its a bit of a dodgy image ... try upgrading to a later one.
From the router CLI... I do have 'ppp ipcp dns request'
so this doesnt make sense as it should lookup www.google.com from telkom DNS servers.
But I get:
Cisco-01#ping www.google.com
Translating "www.google.com"
% Unrecognized host or address, or protocol not running.
Yeah, Will definitely take a look at upgrading the IOS.