ENCODING METHOD FOR T1 LINE FORMAT FOR CCITT 32K BIT PER SECOND ADPCM AND 64K BITS PER SECOND CLEAR CHANNEL TRANSMISSION

摘要

AN ENCODING METHOD FOR Tl LINE FORMAT FOR CCITT 32KBIT PER SECOND ADPCM AND 64K BITS PER SECONDCLEAR CHANNEL TRANSMISSIONABSTRACT OF THE INVENTIONThe present method is an encoding scheme forsuppressing excessive amount of zeroes transmitted via a Tl linefacility. Clear channel transmission capability is provided bythis scheme for 32 kb/s or 64 kb/s transmission channels. Thisscheme provides the proper zero bit suppression for alternatingmark inversion signaling (AMI). A proper AMI signal contains nomore then 15 consecutive zero bit positions. In addition tomeeting the AMI signaling standards, this scheme does not induceany violations of VMR (violation monitor and removal) equipment.Thus, this scheme is transparent to existing line equipment anderror monitoring equipment, This scheme provides both a necessaryand sufficient method for achieving the AMI signaling requirementsduring clear channel signaling.