There really isn't much to it... I think it's in the tech handbook too (it is on the SX-200 tech handbook, just the ports are different)
Assuming you have everything setup in the 3300... Enter setup of the Ipocket, set all the local network parameters to "0.0.0.0" which means DHCP (the default), set the serial port parameters to whatever you need them to be, and then go into the remote configuration and set it to Telnet client and give it the IP address of the 3300 and port 1752. Save and reboot, you should get a banner message saying "Connected to <3300 IP Addr> on port 1752..." or something similar if successful.
