Service Profile Identifier
A Service Profile Identifier - (SPID) is a number issued by ISDN service providers in North America that identifies the services and features of an ISDN circuit. Service providers typically assign each B channel a unique SPID. A SPID is derived from the telephone number assigned to the circuit, and in the U.S. it typically follows a generic, 14-digit format.
References
"Terminologies Simplified". Network Magazine: Technology Decisions for the Enterprise. Retrieved Dec 5. {{cite web}}
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"What is a SPID?". PC Webopedia. Retrieved Dec 05. {{cite web}}
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