i have a Call Manager which is connect to Cisco 2800 series acting as MGCP getway. ISDN connection between the 2800 and the carrier ( telestra sydney ). the call manager is seeing the gateway and i have configured a numbering plan on the call manager for the phones. the phones can call internally but externally i dont what configuration i should configure under the BRI interface for the carrier ( telestra ) to recongnise my number plan. please if you have any demo configuration or configuration that has perviously used post to me.