EIA/TIA-856.500-C:2011

General Overview The Default Signaling Application encompasses the Signaling Network Protocol (SNP) and 5 the Signaling Link Protocol (SLP). Protocols in each layer use SNP to exchange messages.SNP is also used by application specific control messages. SNP provides a one or two octet header that defines the Type of the protocol and the protocol instance (i.e., InConfiguration or InUse) with which the message is associated. TheSNP uses the header to route the message to the appropriate protocol instance. SLP provides message fragmentation, reliable and best-effort message delivery and duplicate detection for messages that are delivered reliably.