t30_dis_dtc_dcs_bits.h
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/*
* SpanDSP - a series of DSP components for telephony
*
* t30_dis_dtc_dcs_bits.h - ITU T.30 fax control bits definitions
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2009 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*! \file */
#if !defined(_SPANDSP_PRIVATE_T30_DIS_DTC_DCS_BITS_H_)
#define _SPANDSP_PRIVATE_T30_DIS_DTC_DCS_BITS_H_
/* Indicates that the terminal has the Simple mode capability defined in ITU-T Rec. T.37.
Internet address signals CIA, TSA or CSA can be sent and received. The recipient terminal
may process or ignore this signal. */
#define T30_DIS_BIT_T37 1
#define T30_DCS_BIT_T37 1
/* Indicates that the terminal has the capability to communicate using ITU-T Rec. T.38.
Internet address signals CIA, TSA or CSA can be sent and received. The recipient terminal
may process or ignore this signal. */
#define T30_DIS_BIT_T38 3
#define T30_DCS_BIT_T38 3
/* Bit 4 set to "1" indicates 3rd Generation Mobile Network Access to the GSTN Connection.
Bit 4 set to "0" conveys no information about the type of connection. */
#define T30_DIS_BIT_3G_MOBILE 4
#define T30_DCS_BIT_3G_MOBILE 4
/* When ISDN mode is used, in DIS/DTC bit 6 shall be set to "0". */
#define T30_DIS_BIT_V8_CAPABILITY 6
/* When ISDN mode is used, in DIS/DTC bit 7 shall be set to "0". */
#define T30_DIS_BIT_64_OCTET_ECM_FRAMES_PREFERRED 7
/* Bit 9 indicates that there is a facsimile document ready to be polled from the answering
terrminal. It is not an indication of a capability. */
#define T30_DIS_BIT_READY_TO_TRANSMIT_FAX_DOCUMENT 9
/* In DIS/DTC bit 10 indicates that the answering terminal has receiving capabilities.
In DCS it is a command to the receiving terminal to set itself in the receive mode. */
#define T30_DIS_BIT_READY_TO_RECEIVE_FAX_DOCUMENT 10
#define T30_DCS_BIT_RECEIVE_FAX_DOCUMENT 10
/* Bits 11, 12, 13, 14 - modem type */
#define T30_DIS_BIT_200_200_CAPABLE 15
#define T30_DCS_BIT_200_200 15
#define T30_DIS_BIT_2D_CAPABLE 16
#define T30_DCS_BIT_2D_MODE 16
/* Standard facsimile terminals conforming to ITU-T Rec. T.4 must have the following capability:
Paper length = 297 mm. */
/* Bits 17, 18 - recording width */
/* Bits 19, 20 - paper length */
/* Bits 21, 22, 23 - min scan line time */
/* When ISDN mode is used, in DIS/DTC bits 21 to 23 shall be set to "1". */
#define T30_DIS_BIT_UNCOMPRESSED_CAPABLE 26
#define T30_DCS_BIT_UNCOMPRESSED_MODE 26
/* When ISDN mode is used, in DIS/DTC bit 27 shall be set to "1". */
#define T30_DIS_BIT_ECM_CAPABLE 27
#define T30_DCS_BIT_ECM 27
/* The value of bit 28 in the DCS command is only valid when ECM is selected. */
#define T30_DCS_BIT_64_OCTET_ECM_FRAMES 28
/* The value of bit 31 in the DCS command is only valid when ECM is selected. */
#define T30_DIS_BIT_T6_CAPABLE 31
#define T30_DCS_BIT_T6_MODE 31
#define T30_DIS_BIT_FNV_CAPABLE 33
#define T30_DCS_BIT_FNV_CAPABLE 33
#define T30_DIS_BIT_MULTIPLE_SELECTIVE_POLLING_CAPABLE 34
#define T30_DIS_BIT_POLLED_SUBADDRESSING_CAPABLE 35
#define T30_DIS_BIT_T43_CAPABLE 36
#define T30_DCS_BIT_T43_MODE 36
#define T30_DIS_BIT_PLANE_INTERLEAVE_CAPABLE 37
#define T30_DCS_BIT_PLANE_INTERLEAVE 37
#define T30_DIS_BIT_G726_CAPABLE 38
#define T30_DCS_BIT_G726 38
#define T30_DIS_BIT_200_400_CAPABLE 41
#define T30_DCS_BIT_200_400 41
#define T30_DIS_BIT_300_300_CAPABLE 42
#define T30_DCS_BIT_300_300 42
#define T30_DIS_BIT_400_400_CAPABLE 43
#define T30_DCS_BIT_400_400 43
/* Bits 44 and 45 are used only in conjunction with bits 15 and 43. Bit 44 in DCS, when used,
shall correctly indicate the resolution of the transmitted document, which means that bit 44 in DCS may
not always match the indication of bits 44 and 45 in DIS/DTC. Cross selection will cause the distortion
and reduction of reproducible area.
If a receiver indicates in DIS that it prefers to receive metric-based information, but the transmitter has
only the equivalent inch-based information (or vice versa), then communication shall still take place.
Bits 44 and 45 do not require the provision of any additional features on the terminal to
indicate to the sending or receiving user whether the information was transmitted or received on a metric-metric,
inch-inch, metric-inch, inch-metric basis. */
#define T30_DIS_BIT_INCH_RESOLUTION_PREFERRED 44
#define T30_DCS_BIT_INCH_RESOLUTION 44
#define T30_DIS_BIT_METRIC_RESOLUTION_PREFERRED 45
#define T30_DIS_BIT_MIN_SCAN_TIME_HALVES 46
#define T30_DIS_BIT_SELECTIVE_POLLING_CAPABLE 47
#define T30_DIS_BIT_SUBADDRESSING_CAPABLE 49
#define T30_DCS_BIT_SUBADDRESS_TRANSMISSION 49
#define T30_DIS_BIT_PASSWORD 50
#define T30_DCS_BIT_SENDER_ID_TRANSMISSION 50
/* Bit 51 indicates that there is a data file ready to be polled from the answering terminal. It is
not an indication of a capability. This bit is used in conjunction with bits 53, 54, 55 and 57. */
#define T30_DIS_BIT_READY_TO_TRANSMIT_DATA_FILE 51
/* The binary file transfer protocol is described in ITU-T Rec. T.434. */
#define T30_DIS_BIT_BFT_CAPABLE 53
#define T30_DCS_BIT_BFT 53
#define T30_DIS_BIT_DTM_CAPABLE 54
#define T30_DCS_BIT_DTM 54
#define T30_DIS_BIT_EDI_CAPABLE 55
#define T30_DCS_BIT_EDI 55
#define T30_DIS_BIT_BTM_CAPABLE 57
#define T30_DCS_BIT_BTM 57
/* Bit 59 indicates that there is a character-coded or mixed-mode document ready to be polled
from the answering terminal. It is not an indication of a capability. This bit is used in
conjunction with bits 60, 62 and 65. */
#define T30_DIS_BIT_READY_TO_TRANSMIT_MIXED_MODE_DOCUMENT 59
#define T30_DIS_BIT_CHARACTER_MODE 60
#define T30_DCS_BIT_CHARACTER_MODE 60
#define T30_DIS_BIT_MIXED_MODE 62
#define T30_DCS_BIT_MIXED_MODE 62
#define T30_DIS_BIT_PROCESSABLE_MODE_26 65
#define T30_DIS_BIT_DIGITAL_NETWORK_CAPABLE 66
#define T30_DCS_BIT_DIGITAL_NETWORK_CAPABLE 66
#define T30_DIS_BIT_DUPLEX_CAPABLE 67
#define T30_DCS_BIT_DUPLEX_CAPABLE 67
#define T30_DIS_BIT_T81_CAPABLE 68
#define T30_DCS_BIT_FULL_COLOUR_MODEX 68
#define T30_DIS_BIT_FULL_COLOUR_CAPABLE 69
#define T30_DCS_BIT_FULL_COLOUR_MODE 69
/* In a DIS/DTC frame, setting bit 71 to "0" indicates that the called terminal can only accept
image data which has been digitized to 8 bits/pel/component for JPEG mode. This is also true for T.43
mode if bit 36 is also set to "1". Setting bit 71 to "1" indicates that the called terminal can also accept
image data that are digitized to 12 bits/pel/component for JPEG mode. This is also true for T.43 mode if
bit 36 is also set to "1". In a DCS frame, setting bit 71 to "0" indicates that the calling terminal's image
data are digitized to 8 bits/pel/component for JPEG mode. This is also true for T.43 mode if bit 36 is also
set to "1". Setting bit 71 to "1" indicates that the calling terminal transmits image data which has been
digitized to 12 bits/pel/component for JPEG mode. This is also true for T.43 mode if bit 36 is also set
to "1". */
#define T30_DIS_BIT_12BIT_CAPABLE 71
#define T30_DCS_BIT_12BIT_COMPONENT 71
#define T30_DIS_BIT_NO_SUBSAMPLING 73
#define T30_DCS_BIT_NO_SUBSAMPLING 73
#define T30_DIS_BIT_CUSTOM_ILLUMINANT 74
#define T30_DCS_BIT_CUSTOM_ILLUMINANT 74
#define T30_DIS_BIT_CUSTOM_GAMUT_RANGE 75
#define T30_DCS_BIT_CUSTOM_GAMUT_RANGE 75
#define T30_DIS_BIT_NORTH_AMERICAN_LETTER_CAPABLE 76
#define T30_DCS_BIT_NORTH_AMERICAN_LETTER 76
#define T30_DIS_BIT_NORTH_AMERICAN_LEGAL_CAPABLE 77
#define T30_DCS_BIT_NORTH_AMERICAN_LEGAL 77
#define T30_DIS_BIT_T85_CAPABLE 78
#define T30_DCS_BIT_T85_MODE 78
#define T30_DIS_BIT_T85_L0_CAPABLE 79
#define T30_DCS_BIT_T85_L0_MODE 79
/* In a DIS/DTC frame, setting bit 97 to "0" indicates that the called terminal does not have the
capability to accept 300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm
resolutions for colour/gray-scale images or T.44 Mixed Raster Content (MRC) mask layer.
Setting bit 97 to "1" indicates that the called terminal does have the capability to accept
300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm resolutions for
colour/gray-scale images and MRC mask layer. Bit 97 is valid only when bits 68 and 42 or 43
(300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm) are set to "1".
In a DCS frame, setting bit 97 to "0" indicates that the calling terminal does not use
300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm resolutions
for colour/gray-scale images and mask layer.
Setting bit 97 to "1" indicates that the calling terminal uses 300 pels/25.4 mm x 300 lines/25.4 mm
or 400 pels/25.4 mm x 400 lines/25.4 mm resolutions for colour/gray-scale images and MRC mask layer.
Bit 97 is valid only when bits 68 and 42 or 43 (300 pels/25.4 mm x 300 lines/25.4 mm and
400 pels/25.4 mm x 400 lines/25.4 mm) are set to "1".
In a DIS/DTC frame, combinations of bit 42, bit 43 and bit 97 indicate that the called terminal
has higher resolution capabilities as follows:
Resolution capabilities (pels/25.4 mm)
DIS/DTC Monochrome Colour/gray-scale
42 43 97 300 x 300 400 x 400 300 x 300 400 x 400
0 0 0 no no no no
1 0 0 yes no no no
0 1 0 no yes no no
1 1 0 yes yes no no
0 0 1 (invalid)
1 0 1 yes no yes no
0 1 1 no yes no yes
1 1 1 yes yes yes yes
"yes" means that the called terminal has the corresponding capability.
"no" means that the called terminal does not have the corresponding capability. */
#define T30_DIS_BIT_COLOUR_GREY_300_300_400_400_CAPABLE 97
#define T30_DCS_BIT_COLOUR_GREY_300_300_400_400 97
/* In a DIS/DTC frame, setting bit 98 to "0" indicates that the called terminal does not have the
capability to accept 100 pels/25.4 mm x 100 lines/25.4 mm spatial resolution for colour or gray-scale
images. Setting bit 98 to "1" indicates that the called terminal does have the capability to accept
100 pels/25.4 mm x 100 lines/25.4 mm spatial resolution for colour or gray-scale images. Bit 98 is valid
only when bit 68 is set to "1". In a DCS frame, setting bit 98 to "0" indicates that the calling terminal does
not use 100 pels/25.4 mm x 100 lines/25.4 mm spatial resolution for colour or gray-scale images. Setting
bit 98 to "1" indicates that the calling terminal uses 100 pels/25.4 mm x 100 lines/25.4 mm spatial
resolution for colour or gray-scale images. */
#define T30_DIS_BIT_COLOUR_GREY_100_100_CAPABLE 98
#define T30_DCS_BIT_COLOUR_GREY_100_100 98
/* To provide an error recovery mechanism, when PWD/SEP/SUB/SID/PSA/IRA/ISP frames are sent with DCS or DTC,
bits 49, 102 and 50 in DCS or bits 47, 101, 50 and 35 in DTC shall be set to "1" with the following
meaning:
Bit DIS DTC DCS
35 Polled SubAddress capability Polled SubAddress transmission Not allowed - set to "0"
47 Selective polling capability Selective polling transmission Not allowed - set to "0"
49 Subaddressing capability Not allowed (Set to "0") Subaddressing transmission
50 Password Password transmission Sender Identification transmission
101 Internet Selective Polling Address capability Internet Selective Polling Address transmission Not allowed - set to "0"
102 Internet Routing Address capability Not allowed (Set to "0") Internet Routing Address transmission
Terminals conforming to the 1993 version of T.30 may set the above bits to "0" even though PWD/SEP/SUB
frames are transmitted. */
#define T30_DIS_BIT_INTERNET_SELECTIVE_POLLING_ADDRESS 101
#define T30_DIS_BIT_INTERNET_ROUTING_ADDRESS 102
#define T30_DCS_BIT_INTERNET_ROUTING_ADDRESS_TRANSMISSION 102
#define T30_DIS_BIT_600_600_CAPABLE 105
#define T30_DCS_BIT_600_600 105
#define T30_DIS_BIT_1200_1200_CAPABLE 106
#define T30_DCS_BIT_1200_1200 106
#define T30_DIS_BIT_300_600_CAPABLE 107
#define T30_DCS_BIT_300_600 107
#define T30_DIS_BIT_400_800_CAPABLE 108
#define T30_DCS_BIT_400_800 108
#define T30_DIS_BIT_600_1200_CAPABLE 109
#define T30_DCS_BIT_600_1200 109
#define T30_DIS_BIT_COLOUR_GREY_600_600_CAPABLE 110
#define T30_DCS_BIT_COLOUR_GREY_600_600 110
#define T30_DIS_BIT_COLOUR_GREY_1200_1200_CAPABLE 111
#define T30_DCS_BIT_COLOUR_GREY_1200_1200 111
#define T30_DIS_BIT_ALTERNATE_DOUBLE_SIDED_CAPABLE 113
#define T30_DCS_BIT_ALTERNATE_DOUBLE_SIDED_CAPABLE 113
#define T30_DIS_BIT_CONTINUOUS_DOUBLE_SIDED_CAPABLE 114
#define T30_DCS_BIT_CONTINUOUS_DOUBLE_SIDED_CAPABLE 114
#define T30_DIS_BIT_BLACK_AND_WHITE_MRC 115
#define T30_DIS_BIT_T45_CAPABLE 116
#define T30_DCS_BIT_T45_MODE 116
/* This bit defines the available colour space, when bit 92, 93 or 94 is set to "1".
Available colour space for all combinations of bits 92, 93, 94 and 119 are shown in the following table.
It should be noted that terminals which conform to the 2003 and earlier versions of this Recommendation
will send LAB with "1" in bit 92, 93 or 94 even if bit 119 is set to "1".
Available colour space for DIS/DTC bits 92, 93, 94 and 119
92 93 94 119 Mode of T.44 Available colour space
0 0 0 x Not available -
1 0 0 0 Mode 1 LAB only
1 0 0 1 Mode 1 YCC only
x 1 x 0 Mode 2 or higher LAB only
x x 1 0 Mode 2 or higher LAB only
x 1 x 1 Mode 2 or higher LAB and YCC
x x 1 1 Mode 2 or higher LAB and YCC
Colour space for DCS bits 92, 93, 94 and 119
92 93 94 119 Mode of T.44 Colour space
0 0 0 x* Not available -
1 0 0 0 Mode 1 LAB
1 0 0 1 Mode 1 YCC
x 1 x 0 Mode 2 or higher LAB
x x 1 0 Mode 2 or higher LAB
x 1 x 1 Mode 2 or higher YCC or mixing of YCC and LAB
x x 1 1 Mode 2 or higher YCC or mixing of YCC and LAB */
#define T30_DIS_BIT_T44_COLOUR_SPACE 119
#define T30_DCS_BIT_T44_COLOUR_SPACE 119
/* Can only be set in the communication through the T.38 gateway, to cope with delay of network.
T.x timer (12+-1s) should be used after emitting RNR or TNR. However, after receiving
PPS signal in ECM mode, T.5 timer should be used. */
#define T30_DIS_BIT_T38_FLOW_CONTROL_CAPABLE 121
#define T30_DCS_BIT_T38_FLOW_CONTROL_CAPABLE 121
/* For resolutions greater than 200 lines/25.4 mm, 4.2.1.1/T.4 specifies the use of specific K
factors for each standardized vertical resolution. To ensure backward compatibility with earlier
versions of ITU-T Rec. T.4, bit 122 indicates when such K factors are being used. */
#define T30_DIS_BIT_K_GREATER_THAN_4 122
/* This bit should be set to "1" if the fax device is an Internet-Aware Fax Device as defined in
ITU-T Rec. T.38 and if it is not affected by the data signal rate indicated by the DIS and DTC
signals when communicating with another Internet-Aware Fax Device operating in T.38 mode. This
bit shall not be used in GSTN mode. */
#define T30_DIS_BIT_T38_FAX_CAPABLE 123
/* This bit should be set to "1" if the fax device elects to operate in an Internet-Aware Fax mode
as defined in ITU-T Rec. T.38 in response to a device which has set the related DIS bit to "1".
When this bit is set to "1", the data signal rate of the modem (bits 11-14) should be set to "0". */
#define T30_DCS_BIT_T38_FAX_MODE 123
/* When either bit of 31, 36, 38, 51, 53, 54, 55, 57, 59, 60, 62, 65, 68, 78, 79, 115, 116 and 127 is
set to "1", ECM must be used. If the value of bit field 92 to 94 is non-zero, then ECM must be used.
Annex K describes the optional continuous-tone colour and gray scale images mode
(sYCC-JPEG mode) protocol. When bit 127 in DIS/DTC frame is set to "1", the called terminal has the
capability to accept sYCC-JPEG mode. This is defined with complete independent in the colour space
CIELAB. In addition, when bit 127 in DCS frame is set to "1", ECM must be used and bits 15, 17, 18,
19, 20, 41, 42, 43, 45, 46, 68, 69, 71, 73, 74, 75, 76, 77, 97, 98, 105, 106, 107, 108,
109, 110 and 111 in DCS frame are "Don't care", and should be set to "0". In the case of
transmission of multiple images, a post message signal PPS-MPS between pages, PPS-NULL between
partial pages and PPS-EOP following the last page should be sent from the calling terminal to the
called terminal. */
#define T30_DIS_BIT_SYCC_T81_CAPABLE 127
#define T30_DCS_BIT_SYCC_T81_MODE 127
#endif
/*- End of file ------------------------------------------------------------*/