On 12/12/05, Rodrigo Pimenta Carvalho <[EMAIL PROTECTED]> wrote: > > Hi > > > > I have some basic questions. Can someone help-me? > > > > 1) Does a Proxy Server be always a software?
It can be hardware or software. 2) How can an User Agent Client know a Proxy Server IP address, when it is > necessary to send an INVITE? What I wonder is the way an UAC discover the > proxy's ip. It doesn't, at least by default. I think you can do that by DHCP, but the usual way is to configure the UAC with the proper IP address. 3) If an UAC knows the IP of several proxies, what proxy should be chosen to > the UAC send the INVITE? That is: is there any policy to choose a proxy? Usually, the UAC has a different prefix for each proxy, but once more, that can be configured. And i think there is always a default one. 4) Who or what software is responsible to pass a proxy IP to a UAC, if the > UAC needs a proxy? Normally, the are both in the same software. So you choose the best way to communicate between them. 5) Can I replace a DNS server of a Proxy with a data base (like MySQL) > containing the values URL / IP , since my proxy server can access such > data > from the data base? Didn't understand the question. But you don't need to put your database server in your DNS records. 6) Lets suppose my address is: sip:[EMAIL PROTECTED] I have an IP Phone > here in Inatel. But, next week I'm going to travel to another country, > where > I will have to use IP Phones too. In the other country, should I register > the sip:[EMAIL PROTECTED] again? If yes, have I to choose a new proxy, > running in some machine there? If I choose a new proxy there, how can the > old proxy know about it and update its registrar records? You don't need to change proxy. SIP/SER supports multiple registrations if you use forking. You just need to take the IP phone with you and connect it to the Internet. 7)Lets suppose a Proxy Server's DNS server doesn't have the IP of a called > UAS and any other information. That is, the proxy receiving an INVITE > knows > nothing about the domain of the called person. In this case, the proxy > will > decide to redirect the invite to other proxy. But, in this case, what > another proxy could be an appropriate proxy for that. How to decide it? Didn't understood quite well. But in my opinion, your DNS records that connect to other networks do that automatically. Any hint will be very helpful! > > > > Thanks. > > > > Rodrigo Pimenta Carvalho. > > Brazil > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > I hope i have helped a bit more. José Simões _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
