Keywords: Stm 1.jpg Representation of Synchronous Transport Module level - 1 STM-1 frame in Synchronous Digital Hierarchy en wikipedia 2007-10-25 Rait wikipedia en graph Rait Original upload log en wikipedia Stm_1 jpg 2007-10-25 23 11 Rait 1064×798× 48614 bytes <nowiki>Representation of Synchronous Transport Module level - 1 STM-1 frame in Synchronous Digital Hierarchy </nowiki> Check categories 2008 November 25 it wikipedia Synchronous_Digital_Hierarchy es wikipedia Red_Óptica_Sincrona_SONET es wikipedia Red_óptica_síncrona Optical fiber Optical fiber diagrams Mass media SONET/SDH |