Attachments have file size limits. While we would still encourage keeping file sizes small, if you do need to send a larger file, attachments have file size limits. For files larger than 10MB using a link should be a rule. Attachments can use up a lot of storage.
Welcome to TDOP. The Teaching Dimensions Observation Protocol (TDOP) is a customizable observation protocol can be used to produce robust and nuanced depictions of the dynamics that unfold among teachers, students, and technologies in the classroom.
H.225 RAS Signaling. RAS is the signaling protocol used between gateways and gatekeepers. The RAS channel is opened before any other channel and is independent of the call setup and media transport channels. RAS uses User Datagram Protocol (UDP) ports 1719 (H.225 RAS messages) and 1718 (multicast gatekeeper discovery).