|
Guys what is SIP Proxy Server ? rubanroy 05-June-2008 08:22:56 AMComments Proxy Server: A proxy server is an intermediate entity that receives SIP requests and forwards them on behalf of the requestor. Proxy servers route requests to the user’s current location, authenticate and authorize users for services, and implement provider call-routing policies. It also enforces polices for a user and provides name mapping. For each new request, a proxy can function either in stateful or stateless mode. When it functions as a stateless proxy server, it acts as a simple forwarding element. A stateless proxy server discards information about a message after the message is forwarded. A stateful proxy server remembers information (specifically, transaction state) about each incoming request and also about requests it sends as a result of processing the incoming request. It uses this information to influence the processing of future messages associated with that request. SIP proxy servers use presence services to track users and to check the willingness and ability of users to communicate with other users on the network. A presence service is an application of the SIP-specific event notification mechanism (RFC 3265 (Session Initiation Protocol (SIP) - Specific Event Notification)). It enables a user to be located regardless of the physical location. It also accepts presence information from users, stores, and distributes the presence information to other interested users. Posted by sagitraz It forwards the SIP messages to multiple proxy servers, creating a search tree, in order for the SIP messages to reach their destination. There are two different operating modes for these servers: stateless (the server forgets all the information once the request is sent) and stateful (the server save previous routing information and is able to use it for improving the message transfer). Posted by adalson007 |
Posted: 06-June-2008 07:08:35 PM By: adalson007 It forwards the SIP messages to multiple proxy servers, creating a search tree, in order for the SIP messages to reach their destination. There are two different operating modes for these servers: stateless (the server forgets all the information once the request is sent) and stateful (the server save previous routing information and is able to use it for improving the message transfer). | |
Posted: 29-June-2008 04:52:38 AM By: sagitraz Proxy Server: A proxy server is an intermediate entity that receives SIP requests and forwards them on behalf of the requestor. Proxy servers route requests to the user’s current location, authenticate and authorize users for services, and implement provider call-routing policies. It also enforces polices for a user and provides name mapping. For each new request, a proxy can function either in stateful or stateless mode. When it functions as a stateless proxy server, it acts as a simple forwarding element. A stateless proxy server discards information about a message after the message is forwarded. A stateful proxy server remembers information (specifically, transaction state) about each incoming request and also about requests it sends as a result of processing the incoming request. It uses this information to influence the processing of future messages associated with that request. SIP proxy servers use presence services to track users and to check the willingness and ability of users to communicate with other users on the network. A presence service is an application of the SIP-specific event notification mechanism (RFC 3265 (Session Initiation Protocol (SIP) - Specific Event Notification)). It enables a user to be located regardless of the physical location. It also accepts presence information from users, stores, and distributes the presence information to other interested users. |