---

---

Simply do feature negotiation.

---

Posted by Hash007

H.245 used in VOIP and Once a call has initiated (but not necessarily fully connected) endpoints may initiate H.245 call control signaling in order to provide more extensive control over the conference. H.245 is a rather voluminous specification with many procedures that fully enable multipoint communication, though in practice most implementations only implement the minimum necessary in order to enable point-to-point voice and video communication.
H.245 provides capabilities such as capability negotiation, master/slave determination, opening and closing of "logical channels" (i.e., audio and video flows), flow control, and conference control. It has support for both unicast and multicast communication, allowing the size of a conference to theoretically grow without bound.

---

Posted by HamidAliKhan

A protocol that performs call control, including exchanging gateway capabilities (for example, the supported CODECS) between H.323 end
systems.

---

Posted by suresh123