Solved for me...
Had My issue solved (well mostly)Via the call centre...
They sent me what looks like part of a setup Manual. The guy I spoke to I logged on to my Antenna and that is in bridge mode they said not to fiddle with that.. the rest I pasted below.. Hope it works for you... POST if this works for you..
Configuring ZyXEL Router
Applicable for Firmware Version: V1.00(AAJZ.3)b1_D0
Connect Ethernet cable from your computer to one of the Ethernet ports on the ZyXEL router. To configure the ZyXEL Router, open Internet Explorer and browse to 192.168.1.1. Logon using your logon or default logon details.
The router will request you to change your password. You can change password and write down the new password and store in a safe place. To do this later, click ‘Skip’.
A Quick Start setup window will open. Ignore this message by clicking on ‘Close’.
On the ZyXEL router, enable Ethernet WAN port. To do this click on Network Setting and then on Broadband in the menu.
Click on the Ethernet WAN tab, then select ‘Enable’ and then click on the Apply button.
Create a new WAN Interface profile. To do this click on the Broadband tab and then ‘Add New WAN Interface’.
Type in details as shown below.
Click Apply after filling in the details. You should see the newly created profile appearing in the Interface list.
Add DNS Server IP addresses on the ZyXEL router. To do this click on Network Setting and then on Broadband in the menu.
Scroll down to the DNS Values and select ‘Static’. Type in the DNS Servers as follows

already on the forums here somewhere)
DNS Server 1: 41.160.0.37
DNS Server 2: 41.164.0.11
Then click on ‘Apply’.
Final step is to enable SIP ALG. To do this, click on Network Setting>NAT.
Select the ALG tab, then click on ‘Enable’ for SIP ALG and then click Apply.
Power cycle the ZyXEL router.
Connect the A-Tel LTE CPE (use the LAN port of A-Tel LTE POE adapter) to Ethernet Port 4 on the ZyXEL router. If your computer is connected to the ZyXEL router it will be issued an IP address.