Once released, BNP binds to and activates the atrial natriuretic factor receptor NPRA, and to a lesser extent NPRB, in a fashion similar to atrial natriuretic peptide (ANP) but with 10-fold lower affinity.
The GTP layer for the control plane (GTP-C) tunnels signaling messages between GSNs in the GPRS backbone network.The GTP-C enables several procedures to be performed through the GPRS backbone network, including path management, tunnel management, location management, and mobility management.he GTP layer for the control plane (GTP-C) tunnels signaling messages between GSNs in the GPRS backbone network.
Call signaling using Q.931 (a connection protocol for digital networks, especially VoIP systems, in which messages are transmitted as octets) is done according to the ITU H.225.0 specification, which defines message formats for digital multimedia and VoIP communications.This was first published in March 2008.all signaling is used in voice over IP (VoIP) systems to establish connections between H.323 endpoints, or between an endpoint and a gatekeeper.