A method and system are provided for the detection and compensation of
frame offset discontinuities for tandem connection trails in general and
especially to frame offset discontinuities occurring at the entrance of a
network element in a Synchronous Digital Hierarchy (SDH) and Synchronous
Optical Network (SONET) system. More specifically, a method of
transmitting data in a synchronous hierarchic network system comprising
at least a path segment between a first network element and at least a
second network element on which tandem connection monitoring (TC) method
is established for monitoring transmission of information over the path
segment is characterised by detection of frame offset discontinuities at
the first network element on the basis of the detection of an alteration
of the pointer value.