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Functional Description
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The Crocus HDSL (High bit rate Digital Subscriber Line) is a new-generation manageable baseband modem for E1 digital subscriber lines or private copper networks. The Crocus HDSL integrates the high performance HDSL technology into a product designed to cover long distances at 2 Mbit/s over unshielded twisted pairs without the need for expensive repeaters or pair selection. Therefore, the Crocus HDSL re-enhances the value of the installed copper base to a large extent. A large set of different plug-in interface boards makes the Crocus HDSL ideal for interfacing with almost every application. One can use not only traditional serial interfaces like V.35, V.36, and X.21 (available for both 2 Mbit/s and Nx64 Kbit/s operation) but also G703 (transparent or with G.704 framing) and direct Ethernet 10BaseT connections. All these interface boards can be exchanged in only a few seconds, so flexibility is maximised. For large concentration sites, rack-mount versions are mounted in a standard 19" card nest and can offer densities of up to 30 modems per nest. Both 230/115 Vac and direct 48 Vdc powering can be used. In addition, all Crocus Modems in the network can be managed in an integrated way by an elaborated high-performance integrated management system (HP Openview®). An embedded auxiliary channel on the communication link transmits the management information to remote modems rapidly and efficiently. |
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Packet Switched Backbone Access
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Leased Line Service with Digital Cross Connect
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Direct Ethernet Interconnectivity
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The integrated management allows one to configure the modem remotely, to query the actual status of the modems, to permanently monitor the performance (real-time and statistical information), to conduct fault analysis, and to report alarms to the operator. In order to optimise the service on the installed network, we offer a free Windows & REG; based maintenance package. It is a valuable tool for the field engineer as it supports full configuration and troubleshooting. Typical applications for the Crocus HDSL are in carrier environments (high-speed local loop access), railways, campus networks, hospitals and highways. The Crocus HDSL is ideally suited for high-speed backbone access, LAN to LAN and PBX to PBX connections, as well as for imaging and other bandwidth-demanding applications. In the event of line problems, the Crocus HDSL can disable the faulty pairs and continue with a reduced bandwidth on the remaining pairs (fractional E1). Furthermore, the Crocus HDSL 2p Twin-CV (two modems on one board in a card nest) supports a full and rapid back-up facility to back-up one 2-pair link by means of a continuously available second 2-pair link. The Crocus HDSL is available as a desktop unit or as rack-mounted card (each in a 2-pair or 3-pair version). Line interface
Digital interfaces
Management interface
Auxiliary channel interface
FRONT PANEL
Mechanical data
Environmental Requirements
Power Requirements
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