multiplex section overhead (SDH) (MSOH)
In synchronous transfer mode( STM), the multiplex section overhead (MSOH) is the part of the STM-1 data frame that follows the pointer.
br> The MSOH header takes control between two multiplexers across the regenerators within SDH networks. It has data fields for error detection in a multiplexed section, automatic switching to an alternate path, data channels for service tasks, a data field for the synchronous clock signal and for bit error detection at the receiver.