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United Kingdom's Citizens Advice Bureau Deploys Sangoma Vega50 Gateways to Improve Operational Efficiency

United Kingdom's Citizens Advice Bureau Deploys Sangoma Vega50 Gateways to Improve Operational Efficiency | GradISDN | Scoop.it

Information on CAB's use of Sangoma Vega Gateways

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Primary Rate Interface - Wikipedia, the free encyclopedia

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.

PRI is the standard for providing telecommunication services to offices. It is based on the T-carrier (T1) line in the US and Canada, and the E-carrier (E1) line in Europe. The T1 line consists of 24 channels, while an E1 has 32.

PRI provides a varying number of channels depending on the standards in the country of implementation. In North America and Japan it consists of 23xB (B channels (be/s). In Europe and Australia it is 30xB + 1xD on an E1 2.048 Mbit/s. One timeslot on the E1 is used for synchronization purposes and is not considered to be a B or D channel.

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An introduction to ISDN

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An OK introduction to ISDN technologies, including a discussion on the differences between BRI and PRI circuits. It'll help you understand some of the things a customer might say to you about their current setup.

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The Slow Death of ISDN

The Slow Death of ISDN | GradISDN | Scoop.it
The major telephone companies wish they'd never seen ISDN. It's a pain in the butt to provision, switch, maintain, uphold, and they're not even sure why they do it.
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UK IP/SIP Market Continue to Grow Strongly

A high level overview of developments in the UK telecoms market

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Vega Appliance Series

Vega Appliance Series | GradISDN | Scoop.it
[raw] [/raw] The award-winning Vega series offers a broad range of IP-to-TDM stand-alone gateway devices designed to bridge disparate technologies easily and cost-effectively. Vega gateways provide...
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Basic Rate Interface - Wikipedia, the free encyclopedia

Basic Rate Interface (BRI, 2B+D, 2B1D) is an Integrated Services Digital Network (ISDN) configuration intended primarily for use in subscriber lines similar to those that have long been used for plain old telephone service. The BRI configuration provides 2 bearer channels (B channels) at 64 kbit/s each and 1 data channel (D channel) at 16 kbit/s. The B channels are used for voice or user data, and the D channel is used for any combination of data, control/signalling, and X.25 packet networking. The 2 B channels can be aggregated by channel bonding providing a total data rate of 128 kbit/s. The BRI ISDN service is commonly installed for residential or small business service (ISDN PABX) in many countries.

In contrast to the BRI, the Primary Rate Interface (PRI) configuration provides more B channels and operates at a higher bit rate.

The BRI is split in two sections: a) in-house cabling (S/T reference point or S-bus) from the ISDN terminal up to the NT and b) transmission from the NT to the central office (U reference point).

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BBC NEWS | Broadband kills off consumer ISDN

BBC NEWS | Broadband kills off consumer ISDN | GradISDN | Scoop.it
BT is to withdraw ISDN lines for consumer use later this year due to the growth of broadband in the UK.
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