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Technology Stocks : Cisco Systems, Inc. (CSCO) -- Ignore unavailable to you. Want to Upgrade?

To: CLH who wrote (17636)	10/5/1998 8:55:00 AM
From: aladin	Respond to of 77400

CLH, Yes it does. In the old days a customer device presented a DTE (data terminal equipment) interface towards the network (which was of course a monopoly). The interface that the phone company required was a csu/dsu and in many countries today the phone company will still supply these components (the csu/dsu). At a DS3 level the router interface was a HSSI which required a DSU/CSU to electrically interface to the telecom provider which normally used a pair of BNC cables (for transmit and receive). Interfacing with our ATM DS3 card or Port Adapter or with our POET (Packet over E3/T3) Port Adapters no longer requires the csu/dsu. This function is built in to the cards. Channelized products simply allow the aggregation of more of these elements on a single card. John