EE 284 Lecture Notes - Lecture 7: User Datagram Protocol, H.323, Called Party
Document Summary
The very first request issued by a client is likely to be register, because this is the request that provides the server with an address at which the user can be reached for sip sessions. The register request is somewhat similar to the registration request between a terminal and a gatekeeper in h. 323. In this scenario, collins has logged in to host station1. work. com. Register request to be sent to the local registrar. Note the format of the via: header and in particular the fact that it specifies the transport being used. The default is the user datagram protocol (udp). Note also that the via: header contains a branch parameter which will discusses in proxy servers. The from: header field indicates the address of the individual who has initiated the registration. The to: header field indicates the address of record of the user being registered and is the address that the registrar will store for that user.
