Integrated services digital networks

  • www.rpcp.mit.edu/~gingold/thesis

  • www.mastertrng.com/cbtisdn.htm

  • www.idongroupfl.com/services.htm

  • www.digital-price.com/dp/buy-45/0818606258.html

  • www.ituaj.or.jc/book/itut/i.html

  • www.trillium.com/products/isdn