Response Of H2Tu-C-319 List 4E And H2Tu-R To Los And Ais - ADC HiGain H2TU-C-319 List 4E User Manual

LTPH-UM-1049-02, Issue 2
a successful loopdown is reported; otherwise, a failed loopdown is reported. The loop-down can also be initiated
by depressing the H2TU-R loopback control button or by any of the standard 3-in-5 loop-down commands. The
implemented detection/release loopback algorithm functions properly in the presence of a 10
Since the FT1 mode is a combination of both the full T1 and the latching loopback modes, all codes are always
active. Therefore, if a loopback is initiated by a latching sequence, it can be looped down by either a latching or
generic loopback and vice versa. All loopback commands are completely symmetric in the FT1 mode.
If the latching sequence shown in
cleared, and the H2TU-C reverts back to its initial state where it searches for the initial sequence 1.
After a successful latching sequence terminates in a latched loopback state, this state remains until the Disable
command is detected, or until the LBTO option of NONE, 20, 60, or 120 minutes has expired, whichever occurs
first.
The unframed AIS pattern that is normally sent toward the network for a CI LOS fault condition must be replaced
by the new patterns listed in
Table 13. Response of H2TU-C-319 List 4E and H2TU-R to LOS and AIS
FT1 H2TU-C
Case Option Input
1 ENA SF
2 ENA ESF
3 ENA LOS/AIS
4 ENA LOS/AIS
5 ENA LOS/AIS
(a) Don't care" bit
"
H2TU-C-319 List 4E
Table 12 on page 26
Table 13 when the FT1 loopback option is selected.
H2TU-C Output Pattern
Framing Payload FDL
SF 01111110 N/A
(a)
ESF 01111110 X
SF 01111110 N/A
(a)
SF PL X
(a)
ESF PL X
January 9, 2002
is interrupted for more than 20 minutes, the detection is
H2TU-R H2TU-R
Input Output Status Screen
LOS/AIS 01111110 RCV
UNFR RLOS/RAIS
XMT IDLE
LOS/AIS 01111110 RCV
UNFR RLOS/RAIS
XMT IDLE
LOS/AIS 01111110 RCV
UNFR RLOS/RAIS
XMT IDLE
SF/PL AIS RCV LLOS/LAIS ALRM
ESF/PL AIS RCV LLOS/LAIS ALRM
Provisioning
-3
bit error rate.
Front-Panel
Display
ALRM
RLOS/RAIS
ALRM
RLOS/RAIS
ALRM
RLOS/RAIS
LLOS/LAIS
LLOS/LAIS
27