| Publisher | Quabbin Wire & Cable Co., Inc. | ||
|---|---|---|---|
| Format | HTML | Date added | 02 Jan 2000 |
| Topics | Local Area Networks (LAN), Wide Area Networks (WAN), DWDM, T1, T2, T3 | ||
| Downloads | 54 | ||
Local area networks (LANs) are getting larger, faster and more complex. Campus, metropolitan, and wide area networks are more common. Network administrators want one local network to communicate with others across campus, across town or in another city. Branch office systems periodically transfer data to or from headquarters locations. Local and long distance telephone carriers have historically been the first choice for internetwork transmission. They use existing multiplex switching technology, commonly referred to as T-1 and T-3. These are digital time-division-multiplexing (TDM) schemes, developed many years ago by AT&T to increase the voice channel capacity of circuits within their central offices. After the breakup of AT&T, these technologies became ANSI industry standards, now designated DS-1 and DS-3 respectively.
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