Dialogic DSI SPCI Network Interface Boards - Manual (Page 94)

7 CONFIGURATION COMMAND Reference
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liu_type Description
1 Disabled (used to deactivate a LIU). In this mode the LIU does not produce
an output signal.
2 E1 75ohm unbalanced interface (for future use).
3 E1 120ohm balanced interface.
4 T1
5 E1 75ohm or 120ohm setting based on fitted hardware. (This is the
preferred method of selecting an E1 interface).
The line coding technique taken from the following table:
line_code Description
1 HDB3 (E1 only).
2 AMI with no Zero Code Suppression.
3 AMI with Zero Code Suppression (The appropriate bit in the clear_mask
parameter may be set to disable Zero Code Suppression for individual
timeslots if required) (T1 only).
4 B8ZS (T1 only).
The frame format taken from the following table:
frame_format Description
1 E1 double frame (E1 only)
2 E1 CRC4 multiframe (E1 only)
4 D3/D4 (Yellow alarm = bit 2 in each channel) (T1 only)
7 ESF (Yellow alarm in data link channel) (T1 only)
The CRC mode taken from the following table:
crc_mode Description
1 CRC generation disabled
2 CRC4 enabled (frame_format must be set to 2)
3 CRC4 compatibility mode (frame_format must be set to 2)
4 CRC6 enabled (frame_format must be set to 7)