Hi list! I have done a H.323 - SIP Gateway. The SIP Register is within Asterisk, so all the SIP phones are known and are all registed in Asterisk. Now it works ok, because there are no so many phones connected, about four, but I would like to know if when the SIP network would be bigger, if there will be problems with the dimensions. 100 or more phones connected to the same Gateway and all these extensions will be passed to the Gatekeeper. Thanks a lot for your help. Mireia PS: If I haven't explain correctly or I haven't given all the information, please ask.