Editing Transaction Language 1 (section)

{{Expert needed|1=Computing|reason=needs more explanation in order to be accessible to non-experts|date=October 2019}}
'''Transaction Language 1''' (TL1) is a widely used management protocol in [[telecommunications]]. It is a cross-vendor, cross-technology [[MML (language)|man-machine language]], and is widely used to manage optical ([[SONET]]) and broadband access infrastructure in [[North America]]. TL1 is used in the input and output messages that pass between [[Operations support system|Operations Support Systems]] (OSSs) and Network Elements (NEs). Operations domains such as surveillance, memory administration, and access and testing define and use TL1 messages to accomplish specific functions between the OS and the NE. TL1 is defined in [[Telcordia Technologies]] (formerly [[Bellcore]]) Generic Requirements document [http://telecom-info.njdepot.ericsson.net/site-cgi/ido/docs.cgi?ID=SEARCH&DOCUMENT=GR-831& GR-831-CORE].