Description: This variable describes the variety of Zero Code Suppression used on this interface, which in turn affects a number of its characteristics. jbzs refers the Jammed Bit Zero Suppression, in which the AT&T specification of at least one pulse every 8 bit periods is literally implemented by forcing a pulse in bit 8 of each channel. Thus, only seven bits per channel, or 1.344 Mbps, is available for data. b8zs refers to the use of a specified pattern of normal bits and bipolar violations which are used to replace a sequence of eight zero bits. ANSI Clear Channels may use zbtsi, or Zero Byte Time Slot Interchange. E1 links, with or without CRC, use hdb3 or ami. ami refers to a mode wherein no zero code suppression is present and the line encoding does not solve the problem directly. In this application, the higher layer must provide data which meets or exceeds the pulse density requirements, such as inverting HDLC data. b6zs refers to the user of a specifed pattern of normal bits and bipolar violations which are used to replace a sequence of six zero bits. Used for DS2.

Default is set to b8zs for T1 platforms and hdb3 for E1.

TITLE: AVAILABILITY: jbzs(1) (not supported in this release) b8zs(2) (not supported for e1 lineTypes) hdb3(3) (supported for e1 lineTypes) zbtsi(4) (not supported in this release) ami(5) other(6) (not supported in this release) b6zs(7) (not supported in this rele BAN E1: hdb3,ami; T1: b8zs,ami