Integrated Services Digital Network (ISDN)
Basic Rate Interface (BRI)​​ 

Resumen​​ 

ISDN BRI is a telecommunications standard specified by the International Telecommunication Union (ITU) that provides an all-digital, switched connection to support voice and data services.​​ 

ISDN BRI integrates service by allowing users to perform several digital functions at one time. ISDN BRI customers can research pertinent data on the Internet while participating in a conference call, fax important documents while e-mailing the recipients and send large digital files (graphics or text) in a fraction of the time it would take with regular dial-up. All of this is accomplished with ordinary copper phone lines and an ISDN BRI card.​​ 

Benefits​​ 
 

• Help Increase Productivity. Using ISDN BRI’s higher speeds—ISDN BRI utilizes two separate 64 Kbps channels that can be combined into one 128 Kbps channel.​​ 
• Faster Data Transmission Speeds. Result in quick connection times and low usage costs.​​ 
• Avoid Costs and Inflexibility of Dedicated Lines. The same ISDN line can be used to carry both voice and data, so there is no need to wait for a fax to finish before making a call.​​ 
• Productivity-Enhancing Applications. Take advantage of these applications, such as remote Local Area Network (LAN) access, videoconferencing, pre-press graphics, postproduction editing and digital broadcasting that can reduce travel costs and product development time.​​ 
• Clear, Digital Transmission. This results in few errors or re-transmissions and provides a highly reliable network– all of which can help increase productivity.​​ 
• Back Up Overflow-Dedicated Services. ISDN can be used to protect against outages or to provide cost effective insurance against high-volume congestion for mission critical information. In a large government office, ISDN may be provisioned for use as a disaster recovery backup.​​ 

Características​​ 

ISDN BRI is a two-wire digital subscriber line that provides the following features:​​ 

• Two 64 Kbps bearer (B) channels used for voice, data, and video; both B channels can be bonded providing a 128Kbps circuit.​​ 
• One 16 Kbps data (D) channel used as the signaling channel for call set-up and call-completion messages to support enhanced features such as caller ID and to carry low-bandwidth, packet-switched data.​​ 

Verizon supports both national (standard) and custom ISDN, though national is promoted and preferred. National ISDN is standards-based and supported by all switch suppliers to ensure switch interoperability.​​ 

ISDN BRI lines are supported per the specifications found in ANSI/EIA T1.607 and 610. ISDN BRI lines can consist of one or two B channels of 64 Kbps each and one D channel of 16 Kbps.​​