ISDN redirects here. For other uses, see ISDN (disambiguation). Not to be confused with SDN ( Software-defined networking). Integrated Services for Digital Network ( ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. It was first defined in 1988 in the CCITT red book.[1] Prior to ISDN, the telephone system was viewed as a way to transport voice, with some special services available for data. The key feature of ISDN is that it integrates speech and data on the same lines, adding features that were not available in the classic telephone system. There are several kinds of access interfaces to ISDN defined as Basic Rate Interface ( BRI Primary Rate Interface ( PRI Narrowband ISDN ( N- ISDN and Broadband ISDN ( B- ISDN). ISDN is a circuit-switched telephone network system, which also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in potentially better voice quality than an analog phone can provide. It offers circuit-switched connections (for either voice or data and packet-switched connections (for data in increments of 64 kilobit/s. A major market application for ISDN in some countries is Internet access, where ISDN typically provides a maximum of 128 kbit/s in both upstream and downstream directions. Channel bonding can achieve a greater data rate; typically the ISDN B-channels of three or four BRIs (six to eight 64 kbit/s channels) are bonded. ISDN should not be mistaken for its use with a specific protocol, such as Q.931 whereas ISDN is employed as the network, data-link and physical layers in the context of the OSI model. In a broad sense ISDN can be considered a suite of digital services existing on layers 1, 2.
Page 1 Cisco Tele Presence ISDN Link Installation guide Package contents: • ISDN Link • Power Adapter • LAN Cable • Foot bumpers • Installation Guide | JANUARY 2013. Copyright © 2013 Cisco Systems, Inc. All rights reserved. Page 2: Front Panel The LED lights up and remains lit when the ISDN Link is powered up. When the ISDN Link is not configured correctly this LED will be red. This will typically happen when you power up the unit for the first time. Page 3: Rear Panel Connect to a PC/laptop for configuration. Use: 115200 bps, 8 data bits, 1 stop bit, no parity. Power External power adapter with 12 V/1.25 A DC output supports 100/240 VAC and 50/60 Hz inputs. Page 3 of 16 Copyright © 2013 Cisco Systems, Inc. All rights reserved. Page 4 Select one of the three options for the For system configuration, connect a ISDN line connection: Category 5e Ethernet cable between the Ethernet port on the ISDN Link and the Connect the ISDN cable(s) between LAN network. the ISDN BRI port(s) and the ISDN. Page 5 Installation guide Automatic pairing mode Pairing is a process in which the ISDN Link and endpoint communicate with each other in order to establish a connection. The ISDN Link is shipped with pairing mode set to Auto, which enables the ISDN Link to be discovered by an endpoint. When pairing is completed the ISDN Link is dedicated to the endpoint it has been paired with. Page 6 Cisco Tele Presence ISDN Link Installation guide Configuring the ISDN Link Navigate to Configuration > Peripherals > Manage ISDN Link > ISDN Link Configuration. Click ISDN Link Configuration to open the configuration menu. Page 6 of 16 Copyright © 2013 Cisco Systems, Inc. All rights reserved. Page 7 ISDN status information to confirm there are no errors before proceeding. If any errors, or if the power LED is red, please check your.
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