Specifications

4 Message Reference
72
nfaw
The 8-bit value to be used for any E1 non-frame alignment word bit positions that are
not modified by other options. Normally, this parameter should be set to 0x9f for E1
operation and set to 0 for T1. When using unstructured frame format, this parameter
should be set to 0.
ais_gen
The (initial) mode used to generate the Alarm Indication Signal (Blue alarm). The user
may subsequently modify the setting of the outgoing signal using the
LIU_MSG_CONTROL message. The following table shows the permitted values and
their meanings.
Value
Description
1
Disabled; do not generate AIS/Blue alarm
2
Enabled; generate AIS/Blue alarm
When using unstructured frame format, this parameter should be set to 1.
rai_gen
The (initial) mode used to generate the Remote Alarm Indication (Yellow alarm). The
user may subsequently modify the setting of the outgoing RAI alarm using the
LIU_MSG_CONTROL message. The following table shows the permitted values and
their meanings.
Value
Description
1
Disabled; do not generate RAI/Yellow alarm
2
Forced active; generate RAI/Yellow alarm
3
Automatic generation of RAI/Yellow alarm upon loss of synchronization
4
Automatic generation of RAI/Yellow alarm upon loss of synchronization or BER greater than
1 in 1000 (BER3)
When using unstructured frame format, this parameter should be set to 1.
clear_mask
For use with T1 interfaces and line_code mode 3 (AMI with Zero Code Suppression) to
disable zero code suppression on selected channels. This parameter is a 32-bit mask.
Zero code suppression should always be disabled for the signaling channel timeslot by
setting the appropriate bit in the mask. The least significant bit corresponds to timeslot
0 and the most significant bit to timeslot 31. Bits should be set to 1 to disable zero
code suppression.
sensitivity
The mode settings to configure interface sensitivity for monitoring purposes. The
following table shows the permitted values and their meanings.