ADC HiGain HLU-200 User Manual page 33

150-200-114-03, Issue 03
Mode Selection
FRMG AUTO*
UNFR
HAIS 2LP*
1LP
SAIS ENA*
DIS
MARG 0 to 15 dB
(4*)
DS0 Any combination
of the 24 DS0
channels/NONE*
* Indicates HLU-200 List 1D factory settings.
HLU-200 List 1D
Table 10. System Option Settings (Continued)
Configures HiGain to operate in an auto-framing (AUTO) mode in which it
continuously searches the input T1 bit stream for a valid SF or ESF frame pattern.
This feature is required for fractional T1 applications (DS0 blocking) where it
insures proper channel time slot alignment. While HiGain can also process
unframed data in this AUTO mode, it is recommended that the UNFR mode be
used for all unframed applications. Using the AUTO mode for unframed
applications runs the risk of detecting pseudo valid frame sequences, which can
affect the data integrity.
Configures HiGain to operate in an unframed mode. This mode disables the auto
framing process and forces HiGain to function as a transparent bit pipe.
Causes HiGain to transmit the AIS signal at both the HLU and HRU T1 output
ports when both of the HDSL loops are not in sync (LOSW).
Causes HiGain to transmit the AIS signal at both the HLU and HRU T1 output
ports when either of the two HDSL loops is not in sync (LOSW) or if a minor
alarm occurs.
Causes the HRU to transmit the AIS signal towards the CI when in NREM
loopback.
Prevents the AIS signal from being transmitted to the NI and replaces it with the
network test signal in the HRU List 6 and 8 or by a quiet termination (LOS) in the
HRU List 7.
The Margin Alarm Threshold determines the minimum allowable margin below
which an alarm will occur.
The DS0 blocking option allows any number of the 24 DS0 channels to be blocked
at both T1 output ports where they are replaced by the FF idle code.
November 22, 1996
Description
31