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Primary and Rate
DPNSS was developed in the early 1980s by BT, or its forerunner, Post Office Telecommunications in recognition that the emerging Digital Private Circuit Primary Rate product ' Megastream ' had to address the market for both data and voice, the latter being significantly greater because of the market for PBXs.
There are several kinds of access interfaces to ISDN defined as Basic Rate Interface ( BRI ), Primary Rate Interface ( PRI ) and Broadband ISDN ( B-ISDN ).
The other ISDN access available is the Primary Rate Interface ( PRI ), which is carried over an E1 ( 2048 kbit / s ) in most parts of the world.
The following is an example of a Primary Rate ( PRI ) ISDN call showing the Q. 921 / LAPD and the Q. 931 / Network message intermixed ( i. e. exactly what was exchanged on the D-channel ).
The Primary Rate Interface ( PRI ) is a standardized telecommunications service level within the Integrated Services Digital Network ( ISDN ) specification for carrying multiple DS0 voice and data transmissions between a network and a user.
The Integrated Services Digital Network ( ISDN ) prescribes two levels of service, the Basic Rate Interface ( BRI ), intended for the homes and small enterprises, and the Primary Rate Interface ( PRI ), for larger applications.
The Primary Rate Interface ( PRI ) consists of 23 64-kbit / s B-channels and one 64-kbit / s D-channel using a T1 line, often referred to as " 23B + D ", ( North American and Japanese standard ) or 30 B-channels and one D-channel using an E1 line ( Europe / rest of world ).
A T1 Primary Rate Interface user would have access to a 1. 472-Mbit / s data service.
An E1 Primary Rate Interface user would have access to a 1. 920 Mbit / s data service
The Primary Rate Interface channels are typically used by medium to large enterprises with digital PBXs to provide them digital access to the Public Switched Telephone Network ( PSTN ).
The Primary Rate user is hooked up directly to the telephone company central office.
fr: Primary Rate Interface
it: Primary Rate Interface
pl: Primary Rate Interface
In contrast to the BRI, the Primary Rate Interface ( PRI ) configuration provides more B channels and operates at a higher bit rate.
In the typical telephony environment, a PBX connects to the local service provider through Primary Rate Interface ( PRI ) trunks.
* Primary Rate Interface, telecommunication standard
Additionally, for voice T1s there are two main types: so-called " plain " or Inband T1s and PRI ( Primary Rate Interface ).
Non-Facility Associated Signalling or NFAS is a Primary Rate Interface configuration whereby multiple T1 carriers share a signalling channel ( or D channel ).
When a T1 circuit is used to carry Primary Rate ISDN one of the timeslots is used to carry the D channel.
A single Primary Rate ISDN circuit is thus sometimes described as 23B + D. There are 23 bearer channels carrying voice or data, and one D channel carrying the Common Channel Signaling.
Customers ordering a Primary Rate ISDN service will be charged for each signalling channel.

Primary and Interface
* Non-Facility Associated Signalling, a Primary Rate Interface configuration whereby multiple T1 carriers share a signaling channel ( or D channel ).
Primary research articles are published in the sister journals Proceedings of the Royal Society, Biology Letters, Journal of the Royal Society Interface, and Interface Focus.

Primary and PRI
E & M is considered an obsolete technology for new installations, which generally use Basic Rate ( BRI ) or Primary Rate ( PRI ) digital interfaces.

Primary and ),
The ACT public education system schooling is normally split up into Pre-School, Primary School ( K-6 ), High School ( 7 – 10 ) and College ( 11 – 12 ) followed by studies at university or TAFE.
There are three classifications of Primary Progressive Aphasia: Progressive nonfluent aphasia ( PNFA ), Semantic Dementia ( SD ), and Logopenic progressive aphasia ( LPA )
The films Primary and Crisis: Behind a Presidential Commitment ( both produced by Robert Drew ), Harlan County, USA ( directed by Barbara Kopple ), Dont Look Back ( D. A. Pennebaker ), Lonely Boy ( Wolf Koenig and Roman Kroitor ) are all frequently deemed cinéma vérité films.
Primary power for the mission was produced by a new solar array technology, the Solar Concentrator Array with Refractive Linear Element Technology ( SCARLET ), which uses linear Fresnel lenses made of silicone to concentrate sunlight onto solar cells.
The Britannica contains 100, 000 articles and Merriam-Webster's Dictionary and Thesaurus ( US only ), and offers Primary and Secondary School editions.
Primary endosymbionts ( sometimes referred to as P-endosymbionts ) have been associated with their insect hosts for many millions of years ( from 10 to several hundred million years in some cases ), they form obligate associations ( see below ), and display cospeciation with their insect hosts.
Primary among the dissolved cations ( positively charged ions ) are Ca < sup > 2 +</ sup > ( calcium ), ( magnesium ), and ( potassium ); the major nutrient anions in nutrient solutions are ( nitrate ), ( sulfate ), and ( dihydrogen phosphate ).
He also served on the Habitat for Humanity Board of Directors, and served on the board of Atlanta-based software maker EzGov Inc. Kemp also served on the Board of Directors of Election. com, which was the private company that ran the world's first election on the internet ( won by Al Gore ), the 2000 Arizona Democratic Primary.
Primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarisation, while its speed in a vacuum, 299, 792, 458 meters per second ( about 300, 000 kilometers per second ), is one of the fundamental constants of nature.
According to the Primary Chronicle, Olga was born in Pleskov ( Pskov ) ( perhaps in Plisnensk near Lviv ), into a family of Varyag origin.
Pressure waves or Primary waves ( P-waves ), are longitudinal waves that involve compression and rarefaction ( expansion ) in the direction that the wave is traveling.
In 2005, USC established a federal relations office in Washington, D. C. A Health Sciences Alhambra campus holds The Primary Care Physician Assistant Program, the Institute for Health Promotion and Disease Prevention Research ( IPR ), and the Masters in Public Health Program.
Padnell Infants and Junior School, Hart Plain Infants and Junior schools, Springwood Infant School ( formerly Stakes Hill Infant School ), Springwood Junior School ( formerly Hulbert Junior School ), Waite End Primary School, Purbrook Junior School, Queens Inclosure Primary and St. Peter's Catholic Primary.

Primary and also
Primary industries are also of great importance, however.
: This innate coordination that emerges is also described more specifically as " Primary Control ".
Victoria Primary School is also in this area on a large grounds.
Primary pathogens may also cause more severe disease in a host with depressed resistance than would normally occur in an immunosufficient host.
Primary external rail links connect the republic's network with Odessa ( in Ukraine ) on the Black Sea and with the Romanian cities of Iaşi and Galaţi ; they also lead northward into Ukraine.
Characters also each had a Primary Skill Area ( PSA Military, Technological, or Biosocial ) which allowed them to buy skills that fell into their PSA at a discount.
Primary clays, also known as kaolins, are located at the site of formation.
Students in Primary and Secondary schools learning English as the language of instruction also learn a second language called their " Mother Tongue " by the Ministry of Education, where they are either taught Mandarin Chinese, Malay or Tamil.
Williams attended Mill Hill Primary School in Stoke-on-Trent then St Margaret Ward Roman Catholic School in Tunstall, and also attended dance school UKDDF in Tunstall.
Over the next 15 years he held the portfolios of Social Services, Primary Industry and Labour and National Service, and he was also Vice-President of the Executive Council.
With respect to a Primary Health Care setting, they are also educated in a range of Diagnostic techniques.
There are also two state Church Schools ; Llandaff City Church in Wales Primary School and Bishop of Llandaff Church in Wales High School.
Stirling also has a Gaelic-medium unit situated in the city's Riverside Primary School which teaches pupils from across Stirling and Clackmannanshire through the medium of Scottish Gaelic.
There are two doctors ' surgeries in Shepton Mallet, a National Health Service community hospital operated by Somerset Primary Care Trust, and also an independent sector treatment centre which carries out a range of surgical procedures.
Hunterdon also supported Steve Lonegan for Governor over Chris Christie, his less conservative opponent in the 2009 Republican Primary, by a 4. 0 % margin.
Branson has been very supportive of Kenya during its troubles, and in May 2008 had gone to Masai Mara to open a new school ( Sekenani Primary School ) which has also been partly funded by Virgin Atlantic frequent flyers who volunteered their time to help with the construction.
On the outskirts of Biggin Hill, there is also Cudham CoE Primary School which is situated near Foal Farm, Tatsfield Primary and Downe Primary in the Downe village.
There are also a number of primary schools in the area such as Cuddington Croft, St Cecilias Catholic Primary School, Cheam Fields Primary, Cheam Common Primary, Cheam Park Farm Nursery and Infants School, Cheam Park Farm Juniors, Nonsuch Primary and St. Dunstans Church of England Primary.

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