configurations, monitoring, troubleshooting and MACs while once again reducing human error and network security risks; and Tellabs Advanced Security Software Package enhances physical LAN defensibility, enabling consistent protection policies that are centrally managed while continuing to reduce human error and increasing network stability. Services Tellabs offers three services: Professional Network Services, which it describes as providing support at all stages of the network life cycle, Technical Support Services, which offers a variety of technical support agreement options to meet the specific needs of organization's network, and Network Training Services, which offers a variety of network training programs to keep staff up to date to support all phases of network's life cycle. References External links Companies based in Dallas Telecommunications companies of the United States Telecommunications companies established in 1974 1974 establishments in Illinois 2013 mergers and acquisitions Privately held companies based in Texas Private equity portfolio companies 1980s initial public offerings