Hi Ramu,
SIP uses the Internet model for scalability - fast and simple in the core,
smarter with less volume in the periphery. To accomplish this, SIP defines
several types of proxy servers. "Call-stateful" proxies generally live at
the edge of the network. These proxies track call state, and can provide
rich sets of services based on this knowledge. Closer to the core,
"transaction-stateful" (also known as just "stateful") proxies track
requests and responses, but have no knowledge of session or call state.
Once a session invitation is accepted, the proxy forgets about it. When the
session termination arrives, the proxy forwards it without needing to know
about the session.
Finally, "stateless" proxies exist in the core. These proxies receive
requests, like INVITE, forward them, and immediately forget. The SIP
protocol provides facilities to ensure that the response can be correctly
routed back to the caller. Stateless proxies are very fast, but can provide
few services. Call-stateful proxies are not as fast, but they live at the
periphery, where call volumes are lower.
Regards,
Thangarajan.
FlextronicsSoftware
Worlds largest SIP stack vendor
nath ramu
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[Sip-implementors] stateful and
statless proxy
01/18/2006 10:20
AM
Hi,
Am a newbie to SIP. I want to know the actual
differences between statelss and stateful proxy. Under
what situations we use these? Pls help me out...
thanks in advance.
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