H.225.0

From Free net encyclopedia

H.225.0 is a sub-standard of H.323.

The main objective of H.225.0 is the definition of messages:

  • Call Signaling: establish, control and end an H.323 call. The call signaling of H.225.0 is based on the call setup procedures for ISDN, Recommendation Q.931.
  • RAS Signaling Function: perform registration, admission, bandwidth changes, status and dissengange procedures between endpoints and an H.323 Gatekeeper. The RAS signaling function uses a separate channel ( RAS channel). This set of messages is called Registration, Admission and Status ( RAS).

The Message Encoding is performed by utilizing Q.931 User-to-User information elements to convey H.225 messages. The messages themselves are encoded according to the Packed Encoding Rules (PER) of ASN.1.de:H.225.0 fr:H.225

Retrieved from "http://www.netipedia.com/index.php/H.225.0"