Hot Brick LB-2 Router....

Google took me straight to the manual. This is a Switch not a router so it operates in layer-2 (ethernet). Layer-2 ports are the interfaces on the back of the switch. You want a router that can do layer-3 TCP/IP port forwarding. Layer-3 ports are unsigned 16-bit integers associated with an IP address and a protocol.

Try these guys.
http://portforward.com/english/routers/port_forwarding/ZyXEL/P-660R-D1/Minecraft_Server.htm

Connect your Internet phone directly to the cable modem and see if you can use Internet phone directly through the modem.
If it works through the modem then it must be the issue with the port forwarding.
First get the port numbers from the phone manufacturer.
Open the setup page of the router and open those port numbers.

Default IP address: 192.168.1.1try this one... ^_^ have a nice day ahead

Navigate to "My Network Places" on your computer. Right-click on the LAN with which you connect to the Internet.Select "Properties" from the drop-down list.Click the "Advanced" button, and highlight your connection. Then, click on "Settings." A window will open showing the ports that you currently have set up.Click on the "Add" button to make a new port. Put the desired IP in the Name or IP Address box. Put the port number in the fields below it. Also, you probably will want to select "TCP," as it is the newest technology with the most services and compatibility
Creating Ports in Your Router
Access your router by opening your web browser and typing 192.168.1.1. Type your router administrative user name and password when the login box opens. Once you type this, the routers settings should open on the screen Navigate to the applications tab of the settings window and select port forwarding. This should open a screen full of port range boxes. Fill these with the same settings you used on your LAN connection and click "Save Settings.
Restart your system to implement the changes you have made.

it is the problem with router....the firewall built-in in the router will not allow certain gaming devices to go online...for this purpose you need to forward certain ports in the belkin router...for the list of port numbers to be forwarded, contact xbox vendor....once you got those port numbers, you can call 24x7 toll free belkin tech support(1800-2-235546)(1800-2-belkin) and ask them to assist u to forward ports... or you can can connect a computer to one of the wired ports(1 to 4) and open internet explorer and type 192.168.2.1 in address bar and hit "enter key". you ll see belkin router setup page...on the left side you ll find "virtual servers"...open that link(if it asks password, leave it blank and click submit) fill the IP address of your xbox in that form and type the port numbers and select appropriate (tcp/udp)... also click on"firewall" in left and disable it.... also click on DMZ in left and type your xbox ip address there and enable it... thats it.... you are done with that...

Forwarding Port – If you select 'Same as Incoming port' then all incoming traffic on specified Service is forwarded to LAN server without modifying Destination Port. – If you select 'Forward to another port range' then all incoming traffic received on the Service port (or range of ports) is forwarded to this port or range of ports of the LAN Server. – This field is disabled if action selected is "Block Always". – If you want to forward the traffic to a single port then enter port value in start port and leave finish port empty. – If you want to forward the traffic to range of ports then enter non zero value in finish port and make sure that service record attached to this rule has range of ports and range is equal to that of forwarding ports. – For example if you select Service as HTTP (TCP/80), LAN Server IP address as 192.168.15.10 and Forwarding port as 8080 then all traffic coming from internet on – TCP/80 (HTTP) to this Router is redirected to TCP/8080 port of 192.168.15.10 • WAN Users: These settings determine which packets are covered by the firewall rule, based on their source (WAN) IP address. Select the desired option: – Any All IP addresses are covered by this firewall rule. – Address range If this option is selected, you must enter the "Start" and "Finish" fields. – Single address Enter the required address in the "Start" fields. • Log: This determines whether packets covered by this firewall rule are logged. Select the desired action. – Never - never log traffic considered by this firewall rule, whether it matches or not. – Match - Log traffic only it matches this firewall rule. (The action is determined by this firewall rule.)
Ok well this is out of the manual, to me it seems straight forwards, but it is a brick too though, there is an example to help you, basically you tell it the Address of the PC, (Right click on NIC and get address) that you want ports to go to.. then ALLOW it, UN-disable actually.. in the tables.

There may be a place in the router panel just for the xbox, there is in mine. Also, you may need to forward some ports for that. I flashed my router with DDWRT, and that router panel is awsum. If you decide to flash the router with DDWRT, be VERY careful, follow the instructions to the T. If you brick the router you're screwed.

You have two options:
1. You can open port using router's web interface. Check what ports used your software, what protocol TCP/UDP/BOTH then go to web interface's virtual server and add new user's rule. Then you have to save and reboot router. Every time your PC IP changed (static IP recommended) or program you using changed port number you have to do web interface operation again.
2. Download and install Router Commander (fully compatible with your router) and that's all. The software will forward ports automatically

It is not possible to close all the ports on the router.
you can open other ports.
by default port 80 is open on the router.
On the router there is no such setting to close the port.