bmr@ihuxz.att.com (Bryan M Richardson) (05/23/90)
In article <8083@accuvax.nwu.edu> pvf@ho3by.att.com writes: >In TELECOM Digest V10 #359, eli@pws.bull.com asks about the phrase >"Software Defined Network" on his new AT&T calling card and wonders if >we just figured out how to make use of software in our network. >Software Defined Network Service (SDN) is a service that has been >tariffed since 1984. It's a service usually used by business >customers with multiple locations. Let me explain my background -- I work in 4 ESS development planning working new features for SDN. SDN was tariffed in September, 1985, and became generally available for customer use in the beginning of 1986 (testing occured prior to this time). As John Higdon explained, there are many ways to access the "virtual private network," one of which is by a 0+ calling card access. The customer is able to choose options for what appears on the card, and apparently the original poster's company has chosen to have "Software Defined Network" among the words on the card. SDN is networking solution offered by AT&T to the largest customers -- typically those placing millions of minutes of calls a year. If there are specific questions regarding the service, I'll be happy to answer them. Bryan Richardson, AT&T Bell Laboratories, Naperville, IL att!attbl!ihuxz!bmr (708) 979-6157