Specifications

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DSI SS7HD Network Interface Boards Programmer's Manual Issue 11
71
crc_mode
The CRC mode. The following table shows the permitted values and their meanings.
Value
Description
1
CRC generation disabled
2
CRC4 enabled (frame_format must be set to 2)
NOTE: Out of CRC4-multiframe E-Bits are transmitted as ones.
3
CRC4 compatibility mode (frame_format must be set to 2)
4
CRC6 enabled (frame_format must be set to 7 or 8)
5
CRC4 G.706mode (frame_format must be set to 2)
NOTE: Out of CRC4-multiframe E-Bits are transmitted as zeroes.
build_out
The following table shows the permitted values and their meanings.
Value
Description
0
Setting for E1 devices
1
T1 default (T1 short haul 0 - 110 ft)
2
T1 short haul 0 - 110 ft
3
T1 short haul 110 - 220 ft
4
T1 short haul 220 - 330 ft
5
T1 short haul 330 - 440 ft
6
T1 short haul 440 - 550 ft
7
T1 short haul 550 - 660 ft
8
T1 long haul LB0 (-0dB)
9
T1 long haul LB0 (-7.5dB)
10
T1 long haul LB0 (-15dB)
11
T1 long haul LB0 (0dB TR62411)
faw
The 8-bit value to be used for any E1 frame alignment word bit positions that are not
modified by other options. This allows the spare bit designated For International Use to
be set by the user when CRC4 mode is disabled. Valid values are 0x9b or 0x1b. When
using T1 this parameter should be set to 0. For E1, the default value is 0x9b. When
using unstructured frame format, this parameter should be set to 0.