Bibliografia

BATES, R. J.; "Introduction to T1/T3 networking". Artech House, Inc. 1992.

HEYWOOD, P.; "E1 Circuits: Does Less Bandwidth Mean Better Quality?". Data Communications, February, 1992.

JOHNSON, J. T.; "HDSL: An Extra Boost on the Local Loop". Data Communications, September,21 , 1992.

RICKARD, N.; "Bridging Between E-1 and T-1". Telecommunications, January, 1990.

TAYLOR, K. M.; "A New Analysis Plan: Buy Now, Play Later". Data Communications, February, 1995.