J-carrier (Japanese-carrier)

A hierarchy of standards for digital transmission that essentially is the

Japanese version of the United States T-carrier digital carrier system.At levels one and two, J-carrier mimics T-carrier with respect to the signaling rates, but diverges at level three and beyond. J-carrier also uses a different PCM companding technique (A-law rather than µ-law). As J-carrier is medium-independent, it can be provisioned over any of the transmission media, at least at the J-1 rate of 1.544 Mbps. (At the J-3

rate of 32.064 Mbps, twisted pair is unsuitable due to issues of signal attenuation.) The fundamental building block of J-carrier is a 64-kbps channel, referred to as DS-0 (Digital Signal level Zero).Through time division multiplexing (TDM), J-carrier interleaves DS-0 channels at various signaling rates to create the services that comprise the Japanese digital hierarchy, as detailed in Table J-1.

• CDDI (Copper Distributed Data Interface)
• CDG
• CDMA2000 (Code Division Multiple Access 2000)
• CDMA (Code Division Multiple Access)
• CDMA Digital Cellular (Code Division Multiple Access Digital Cellular)
• CDMA Digital Cellular (Code Division Multiple Access Digital Cellular)
• cdmaOne (code division multiple access One)
• cdmaOne (code division multiple access One)
• CDPD (Cellular Digital Packet Data)
• CDR (Call Detail Record).
• CDSU (Channel Data Service Unit)
• CDV (Cell Delay Variation)
• CDVT (Cell Delay Variation Tolerance)
• CEA
• cell
• cell delay variation (CDV)
• cell delay variation tolerance (CDVT)
• cell error ratio (CER)
• cell loss priority (CLP)
• cell loss ratio (CLR)
• cell misinsertion rate (CMR)
• cell tax
• cell tax
• cell tax
• cell transfer delay (CTD)