3GPP Sh  Application ( 16777217 )

The Sh reference point resides between the Home Subscriber Server (HSS) and an Application Function (AF). The Sh interface implements a Diameter application that allows the download and update of transparent and not-transparent user data, and allows requests and notifications on changes to user data.
Reference:  3GPP TS29.328/TS29.329   View
MESSAGES

Name

Code

User-Data-Request 306
User-Data-Answer 306
Profile-Update-Request 307
Profile-Update-Answer 307
Subscribe-Notifications-Request 308
Subscribe-Notifications-Answer 308
Push-Notification-Request 309
Push-Notification-Answer 309