digital cross-connect


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digital cross-connect

A network device used by telecom carriers and large enterprises to switch and multiplex low-speed voice and data signals onto high-speed lines and vice versa. It is typically used to aggregate several T1 lines into a higher-speed electrical or optical line as well as to distribute signals to various destinations; for example, voice and data traffic may arrive at the cross-connect on the same facility, but be destined for different carriers. Voice traffic would be transmitted out one port, while data traffic goes out another.

Cross-connects come large and small, handling only a few ports up to a few thousand. Narrowband, wideband and broadband cross-connects support channels down to DS0, DS1 and DS3 respectively.

Used With Telephone Switches
Digital cross-connects (DCSs) are widely used in conjunction with central office telephone switches and may be installed both before and/or after the switch. Cross-connections are established via an administrative process and are semi-permanent, whereas the telephone switch dynamically picks up dialing instructions and routes calls based on telephone number. See optical cross-connect.


A Digital Cross-Connect (DCS)
Digital cross-connects come in many sizes and can take up as little as one shelf on a rack or as many as 60. This TITAN 5500 system from Tellabs is an example of a large wideband cross-connect. (Image courtesy of Tellabs.)








Telco Switch Entry Points
The digital cross-connect (DCS) serves as the entry/exit point on the trunk side of the switches in local telephone company central offices as well as the wire centers of the interexchange carriers (IXCs).


Telco Switch Entry Points
The digital cross-connect (DCS) serves as the entry/exit point on the trunk side of the switches in local telephone company central offices as well as the wire centers of the interexchange carriers (IXCs).
References in periodicals archive ?
The PBTDSX is an integrated DS3 digital cross-connect system for connecting a variety of DS-3 digital signals running at 44 Mbps and carrying 672 voice channels/line.
Mindspeed's iScale(TM) switch fabric chipset will ease system design and speed up time-to-market cycles for high-density Internet protocol (IP) switches, 10 Gbps Ethernet switches, storage routers, Web switches, multi-gigabit IP and asynchronous transfer mode (ATM) core routers, and digital cross-connect systems.
will send a network-wide distributed digital cross-connect transport system to the network services marketplace.

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