With all of the choices corporations have in telecom products, services and strategy, coupled with stringent economic conditions, it's sometimes easier to do nothing than to make a change for the better. The problem with the do-nothing approach is that, although seemingly risk-free and comfortable, it does nothing to accommodate the rapid changes taking place in applications (knowledge management, CRM, supply chain integration and more), storage (IP storage-area networks), and computing and middleware (blade servers and grid computing) - all of which are based on TCP\/IP.Many, if not most, of today's corporate WANs continue to rely on what one might term "legacy"\u00a0frame relay \u00a0and\/or private-line services. Time-tested and trustworthy, they serve as the backbone for existing internal corporate data communications. And, although IP is used for Internet connectivity and some supply chain integration, companies have been reluctant to migrate internal data applications, let alone their public switched telephone network (PSTN) voice services, to the world of IP.However, competitive advantage, especially in times of economic and technologic turmoil, can be gained by taking calculated risk. For corporate WANs, perhaps the advantages gained by moving to an IP WAN now are worth the effort and short-term expense, for three reasons:Companies that have leveraged IP are realizing significant productivity gains over their competitors. According to The\u00a0Net Impact Study\u00a0by the Momentum Research Group last year, U.S. businesses have saved more than $155.2 billion and increased revenue by $444 billion by adopting Internet business products. The study also found that the more such products a company adopts, the greater the return.IP WAN products bring back the original "single voice and data applications networking" approach that the PSTN established more than 100 years ago. With the telephone, you can call anyone, anywhere at any time, and transact all the business you want. IP networking cost-effectively brings back this single-network approach, reducing network, operations, management and capital costs. And, with the availability of do-it-yourself and managed\u00a0VPN\u00a0offerings, security is not an issue.IP WANs are flexible and expandable by their very nature. Frame relay\u00a0committed information rates,\u00a0permanent virtual circuits\u00a0and\u00a0switched virtual circuits\u00a0were designed to protect and make more efficient the carrier's network, not yours. As a result, corporate network managers have spent significant time and money learning the intricacies of frame relay to ensure that the service will meet their needs. IP networks, unbounded by the constraints of technologies developed to meet the needs of the 1980s, free applications to meet the requirements of internal and external data and voice communications - from supply chain automation to CRM and\u00a0e-commerce.Companies should make their move now to an all-IP network infrastructure. Flexibility, interoperability and ubiquity are intrinsic to IP. Cost effectiveness and simplicity are key features. It might not be time to take big risks, but it is time for IP.