XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
8.0 LIU TRANSMIT PATH
REV. 1.0.1
8.1
Transmit Diagnostic Features
In addition to TAOS, the XRT86L30 offers multiple diagnostic features for analyzing network integrity such as
ATAOS, Network Loop Code generation, and QRSS on a per channel basis by programming the appropriate
registers. These diagnostic features take priority over the digital data provided by the Framer block. The
transmitters will send the diagnostic code to the line and will be maintained in the digital loopback if selected.
8.1.1
TAOS (Transmit All Ones)
The XRT86L30 has the ability to transmit all ones on a per channel basis by programming the appropriate
channel register. This function takes priority over the digital data provided by the Framer block. For example:
If a fixed "0011" pattern is provided by the Framer block and TAOS is enabled, the transmitter will output all
ones. Figure 48 is a diagram showing the all ones signal at TTIP and TRING.
F
IGURE 48. TAOS (TRANSMIT ALL ONES)
1
1
1
TAOS
183
EXAR [ EXAR CORPORATION ]
