I have yet to encounter many use cases for this - Grand
Central has the concept of notification messages, but
few customers use them at this point. I imagine though
that this has something to do with a service returning an
HTTP status code of 202 (Accepted), or 204 (No
response).
HTTP Status Code Reference:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
Logged In: YES
user_id=28043
Support one-way transport for both async and synchronous
messaging modes.