#Sip definition electronic records series

SIP takes less CPU cycles to generate signaling messages therefore a server could theoretically handle more transactions. SIP supports n to n scaling between UAs and servers. A gateway can use messages defined in H.225 to assist the gatekeeper in performing load balancing across gateways.Ĭall control can be implemented in a call stateless manner. H.323 call control can be implemented in a stateless manner. The SIP Registrar and redirect servers were designed to support user location. When multiple servers are involved in setting up a call, SIP uses a loop detection algorithm similar to the one used in BGP, which can be done in a stateless manner, thus avoiding scalability issues. SIP inherently supports wide area addressing. Performing the loop detection can be done (using the PathValue field), but introduces other issues related to scalability. In multi-domain searches, there is no easy way to perform loop detection. Annex G defines communication between administrative domains, describing methods to allow for address resolution, access authorization and usage reporting between administrative domains. Procedures are defined for “user location” across zones for email names. The concept of a zone was added to accommodate wide area addressing. The initial intent of H.323 was for the support of LANs, so it was not inherently designed for wide area addressing. Yes, through SIP as described in separate Internet Drafts.

#Sip definition electronic records series

More sophisticated control is defined by the related H.450.x series of standards. Yes, through third-party pause and re-routing which is defined within H.323. Yes, location requests (LRQ) and auto gatekeeper discovery (GRQ).

Other features are in other separate orthogonal protocols. SIP is modular because it covers basic call signaling, user location, and registration. H.323 covers almost every service, such as capability exchange, conference control, basic signaling, QoS, registration, service discovery, and so on. Which protocol will win out in the end? It is still too early to tell, but our unbiassed analysis will help you decide which protocol best suites your application. SIP is currently less defined, but has greater scalability which could ease internet application integration. H.323 is the more mature of the two, but problems may arise due to lack of flexibility. As a manufacturer of telephone test equipment, we have to evaluate the potential market for both H.323 and SIP.