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ATM (Asynchronous Transfer Mode)

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ATM integrates voice, video, and data over a single local-area network (LAN) or wide-area network (WAN)

Integrate your many networks into one, with AT&T ATM (Asynchronous Transfer Mode) service. ATM integrates voice, video, and data over a single local-area network (LAN) or wide-area network (WAN). ATM service can support:

  • Any number of users
  • Any type of information
  • Virtually any service, using multiple speeds and protocols

AT&T ATM service is a switched-data technology with a difference:

  • Fixed-length cells for faster speeds than other packet-switched services
  • Speeds ranging from DS1 to OC12
  • Simultaneous transmission of different data speeds and protocols
  • Meets multiple established Quality of Service standards
  • Only proven transfer medium that can support any traffic type


  • High-speed data transmission, especially among widely distributed locations
  • Data transmission at native-mode LAN rates
  • Voice, video, data, and e-mail over a single transport medium
  • Scalable to various bandwidths, speeds, number of users and locations


  • Control your network costs. Managing one network instead of several can help you reduce staffing, maintenance, and billing requirements.
  • Enhance performance over WANs. With LAN-like performance, WANs become virtual LANs. Users at remote sites become more productive as they access corporate information from their desktops, fast and efficiently.
  • Grow your network while being cost-effective. AT&T ATM service is based on a point-to-point switched architecture that uses bandwidth so efficiently you can add locations without decreasing the bandwidth available at each location.
  • Handle new applications affordably. With support for diverse traffic types and quality of service guarantees for diverse performance requirements, ATM service handles demanding multimedia applications.
  • Make use of your current equipment. ATM can be implemented as a network technology (backbone to existing technologies) or as an equipment upgrade.

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