Power connect 3524 Telent issue form remote network

Hello

I have several PowerConnect 3524 distributed on a network, all of the with TELNET and HTTP access enabled. The management IP addressesa are in the 10.10.10.0/24 network

If I try to access any of these switches from the same network:

 - HTTP access works fine

 - PING works fine

 - TELNET works fine

 

If I try to access any of these switches from a different network (via router of course)

 - HTTP access works fine

 - PING works fine

 - TELNET doesn't work

 

I get this message: 17-Apr-2012 16:51:46 %AAA-W-REJECT: New telnet connection for user line telnet, source 172.16.108.202 destination 10.10.10.8  REJECTED

Is there any limitation in the TELNET access to this switches to allow only connections from local network?