IN (Intelligent Network)

A public switched telephone network (PSTN) that, at a minimum, provides

for the switches to consult centralized, service- and customer-specific databases for routing instructions and authorization code verification. Intelligent Network Version 1 (IN/1) was conceived at Bell Labs and unveiled in 1976 with the introduction of INWATS (800) services and the first common channel signaling (CCS) system. IN/1 services included INWATS, calling card verification, and voice virtual private networks (VPNs). IN is dependent on the service creation element (SCE), a set of modular programming tools permitting services to be developed independently of the switch, thereby divorcing the service-specific programmed logic from the switch logic.This enables the service to be developed independently and

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• carrier frequency
• carrier grade
• Carrier Identification Code (CIC)
• carrierless amplitude phase modulation (CAP)
• carrier sense multiple access/collision avoidance (CSMA/CA)
• carrier sense multiple access (CSMA)
• carrier sense multiple access with collision detection (CSMA/CD)
• carrier serving area (CSA)
• carrier system
• carrier system
• Carterfone Decision
• Carterfone Decision
• Cartesian coordinates
• Carty, John Joseph (1861–1932)
• CAS
• Cat 1 (Category 1)
• Cat 2 (Category 2)
• Cat 3 (Category 3)
• Cat 4 (Category 4)
• Cat 4 (Category 4)
• Cat 5 (Category 5)
• Cat 5 (Category 5)
• Cat 5e (Category 5 enhanced)
• Cat 6 (Category 6)
• Cat 7 (Category 7)