xrt75r03 Exar Corporation, xrt75r03 Datasheet - Page 50

• Manufacturer Part Number: xrt75r03
• Description: Xrt75r03 -multi-channel Line Interface Unit Liu Family Desynchronizer And Jitter Attenuator With R3 Technologytm
• Manufacturer: Exar Corporation

XRT75R03
REV. 1.0.8
As defined in ITU-T G.775, an LOS condition is also declared between 10 and 255 UI (or E3 bit periods) after
the actual time the LOS condition has occurred. The LOS condition is cleared within 10 to 255 UI after
restoration of the incoming line signal. Figure 20 shows the LOS declaration and clearance conditions.
F
F
IGURE
IGURE
RTIP/
RRing
RLOS Output Pin
20. L
21. L
OSS
OSS OF
0 dB
-12 dB
-35dB
-15dB
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
O
F
S
S
IGNAL
IGNAL
0 UI
D
D
EFINITION FOR
EFINITION FOR
10 UI
Actual Occurrence
of LOS Condition
LOS Signal Must be Cleared
LOS Signal may be Cleared or Declared
Compliance
LOS Signal Must be Declared
G.775
255 UI
E3
E3
AS PER
AS PER
Time Range for
LOS Declaration
47
ITU-T G.775.
ITU-T G.775
Line Signal
is Restored
Maximum Cable Loss for E3
Time Range for
LOS Clearance
0 UI
10 UI
xr
xr
xr
xr
Compliance
255 UI
G.775