User guide

BROOKTROUT CONFIGURATION FILES
49
Keyword Description
Default value
disabled, stdout
dtmf_thresh
DTMF detection threshold during voice play and record. 0.5 dB units, two's complement. Value
is added to the default DTMF threshold of -28dB.
Value Type
decimal
Default value
0 (-28dB)
ecm_enable
ECM (error correction mode) is enabled or disabled. The normal ECM frame size is 256 bytes.
You can enable a frame size of 64 bytes, but the fax board uses that frame size on transmit
only. On receive, it always uses the frame size the transmitter selects.
0 = ECM disabled.
1 = ECM enabled, 256-byte frames.
2 = ECM enabled, 64-byte frames.
Value Type
decimal
Default value
1
eff_pt_caps
Enhanced fax format page types that the channel is permitted to receive.
0 = Enhanced fax format reception disabled
1 = JPEG
2 = Full color mode (JPEG)
4 = Reserved for Huffman tables, do not use
8 = 12 bits/pel, otherwise 8 bits/pel (JPEG)
10 = No subsampling (JPEG)
20 = Custom illuminant (JPEG)
40 = Custom Gamut (JPEG) 100 = JBIG 200 = L0 Mode (JBIG)
Value Type
hex
Default value
0
error_enable
Error detection is enabled (1) or disabled (2) during fax reception in non-ECM mode as a
decimal digit.
Range: 0 to 1