This Recommendation is a merged revised version of Recommendations G.707, G.708 and G.709 that were approved in Helsinki (03/93) by the WTSC.
This Recommendation provides the requirements for the STM-N signals at the Network Node Interface of a synchronous digital network, including B-ISDN in terms of:
– bit rates;
– frames structures;
– formats for mapping and multiplexing PDH and ATM elements;
– functionalities of the overheads.