Patton electronics 2720/I Series User Manual

Also see for 2720/I Series: Specification sheet User manual

Contents

19This enables information to be sent over a T1 connectionwithout any constraints on the data’s pulse density. This is themost acceptable way to accomplish 64 kb/s on each DS0channel.B7ZS: This stands for Bipolar Seven Zero Substitution. Instead ofintroducing bipolar violations, this method substitutes a onefor a zero in bit 7 (out of 8) of a DS0 channel when the data inthat channel are all zeros. This is a special form of AMI and iscompatible only with special equipment. For most applica-tions, AMI or B8ZS will suffice.DS0 Line Rate: 64kbps(default)Options: 64kbps, 56kbps64kbps: Also known as Clear Channel, this takes full advantageof the available bandwidth in a DS0 channel. Implementing itusually requires B8ZS line coding. In certain cases, specialequipment may implement Clear Channel using AMI or B7ZS.Consult the equipment manual for compatibility. Your carrierwill advise you on whether to use 64 or 56 kb/s. Campusapplications may not have such restrictions, enabling you touse 64kbps. In Unframed format, the 24 DS0s and the fram-ing bits are combined to provide 1.544Mb/s for your use.56kbps: This uses only the first seven bits of the DS0, limiting thedata rate per DS0 channel to 56 kb/s. Your carrier will adviseyou on whether to use 64 or 56 kb/s. This is not availablewhen using the Unframed format.