CN8380 Datasheet, PDF (43/91 Pages) Conexant Systems, Inc – integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications

CN8380
Quad T1/E1 Line Interface
2.0 Circuit Description
2.5 Loopbacks
2.5.3 Remote Line Loopback
Remote Line Loopback (RLL) causes the received data on RTIP/RRING line
inputs to be looped back and re-transmitted on XTIP/XRING line outputs. This
loopback includes all receive and transmit circuitry and the JAT, but does not
include the ZCS decoder and encoder. If the JAT is not enabled, RLL enables the
JAT in the transmit direction for the duration of the loopback. In this case, the JAT
elastic store size is 8 bits. The receiver outputs (RPOSO/RNEGO and RCKO)
continue to output received data; transmit inputs (TPOSI/TNEGI and TCLK) are
ignored.
N8380DSA
Conexant
2-21
Advance Information