Originating Point Code (OPC) means a code assigned to identify CLEC’s system(s) that originate SS7 messages, including LIDB Service Queries.
Service Switching Point (SSP) means the telephone Central Office Switch equipped with a Signaling System 7 (SS7) interface.
SPID is the number that identifies a service provider to the relevant NPAC. The SPID may be a state-specific number. "Serving Wire Center" denotes the CenturyLink building from which dial tone for local Exchange Service would normally be provided to a particular End User Customer premises. "Signaling System 7" or "SS7" is an out-of-band signaling protocol consisting of four basic sub- protocols:
Service Switching Point (SSP) is a telephone central office switch equipped with a Signaling System 7 (SS7) interface.
Public safety answering point (PSAP) means a 24-hour, state, local, or contracted communications facility, which has been designated by the local service board to receive 911 service calls and dispatch emergency response services in accordance with the E911 service plan.