Guide found here.
The default IP address 192.168.1.253 is correct, but this can be changed via the command line if you flush the DHCP leases and establish a new reservation for the LPD you can then set it to whatever you want.
I also changed the LPR Queue name to "Brother" on my router while i was at it..
You can check what the queue name is and the IP address of the print server via telnet. If you don't like the cli you can type menu and you get a basic ascii navigate-able menu.
printersharing LPD list
LPD printserver service:
printersharing LPD queue list
LPD queue info:
dhcp server lease list
Lease Pool TTL State Clientid
4 192.168.1.253 LAN_private infinite USED  5a:98:35:a5:6e:00
It would have been nice if telecom had a guide up on how to use this feature on their router.