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What (who) is Primary Rate Interface - definition

TELECOMMUNICATION STANDARD

Primary rate access; Primary Rate; PRI Modem; Pri modem; PRI/T1; ISDN30; Primary rate interface; PRI line; ISDN PRI

Primary Rate Interface

(PRI) A type of ISDN connection. In North America and Japan, this consists of 24 channels, usually divided into 23 B channels and 1 D channel, and runs over the same physical interface as T1. Elsewhere the PRI has 31 user channels, usually divided into 30 B channels and 1 D channel and is based on the E1 interface. PRI is typically used for connections such as one between a PBX (private branch exchange, a telephone exchange operated by the customer of a telephone company) and a CO (central office, of the telephone company) or IXC (inter exchange carrier, a long distance telephone company). (1995-01-18)

Primary Rate Interface

The Primary Rate Interface (PRI) is a telecommunications interface standard used on an Integrated Services Digital Network (ISDN) for carrying multiple DS0 voice and data transmissions between the network and a user.

https://en.wikipedia.org/wiki/Primary_Rate_Interface

Interface (computing)

CONCEPT OF COMPUTER SCIENCE; POINT OF INTERACTION BETWEEN TWO THINGS

Interfaces (computer science); Interface pattern; Interface (programming); Computer interface; Subinterface; Software Interface; Software interface; Interface Pattern; Interface (software); Interface (Software); Interface (computer science); Function call interface

In computing, an interface is a shared boundary across which two or more separate components of a computer system exchange information. The exchange can be between software, computer hardware, peripheral devices, humans, and combinations of these.

https://en.wikipedia.org/wiki/Interface_(computing)

Wikipedia

Primary Rate Interface

The Primary Rate Interface (PRI) is a telecommunications interface standard used on an Integrated Services Digital Network (ISDN) for carrying multiple DS0 voice and data transmissions between the network and a user.

PRI is the standard for providing telecommunication services to enterprises and offices. It is based on T-carrier (T1) transmission in the US, Canada, and Japan, while the E-carrier (E1) is common in Europe and Australia. The T1 line consists of 23 bearer (B) channels and one data (D) channel for control purposes, for a total bandwidth of 24x64-kbit/s or 1.544 Mbit/s. The E1 carrier provides 30 B- and one D-channel for a bandwidth of 2.048 Mbit/s. The first timeslot on the E1 is used for synchronization purposes and is not considered to be a B- or D-channel. The D-channel typically uses timeslot 16 on an E1, while it is timeslot 24 for a T1. Fewer active bearer channels, sometimes called user channels, may be used in fractional T1 or E1 services.

https://en.wikipedia.org/wiki/Primary Rate Interface