t30_fcf.h

传真通信V27 V29 V17 T38解调与解码

/*
 * SpanDSP - a series of DSP components for telephony
 *
 * fcf.h - ITU T.30 fax control field definitions
 *
 * Written by Steve Underwood <[e-mail]>
 *
 * Copyright (C) 2003 Steve Underwood
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2, 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Id: t30_fcf.h,v 1.10 2007/04/05 19:20:50 steveu Exp $
 */

/*! \file */

#if !defined(_SPANDSP_T30_FCF_H_)
#define _SPANDSP_T30_FCF_H_

/*! Initial identification messages */
/*! From the called to the calling terminal. */
#define T30_DIS     0x80        /*! Digital identification signal */
#define T30_CSI     0x40        /*! Called subscriber identification */
#define T30_NSF     0x20        /*! Non-standard facilities */

/*! Commands to send */
/*! From a calling terminal wishing to be a receiver, to a called terminal
    which is capable of transmitting. */
#define T30_DTC     0x81        /*! Digital transmit command */
#define T30_CIG     0x41        /*! Calling subscriber identification */
#define T30_NSC     0x21        /*! Non-standard facilities command */
#define T30_PWD     0xC1        /*! Password */
#define T30_SEP     0xA1        /*! Selective polling */
#define T30_PSA     0x61        /*! Polled subaddress */
#define T30_CIA     0xE1        /*! Calling subscriber internet address */
#define T30_ISP     0x11        /*! Internet selective polling address */

/*! Commands to receive */
/*! From a calling terminal wishing to be a transmitter, to a called terminal
    which is capable of receiving. */
#define T30_DCS     0x82        /*! Digital command signal */
#define T30_TSI     0x42        /*! Transmitting subscriber information */
#define T30_NSS     0x22        /*! Non-standard facilities set-up */
#define T30_SUB     0xC2        /*! Subaddress */
#define T30_SID     0xA2        /*! Sender identification */
/*! T30_TCF - Training check is a burst of 1.5s of zeros sent using the image modem */
#define T30_CTC     0x12        /*! Continue to correct */
#define T30_TSA     0x62        /*! Transmitting subscriber internet address */
#define T30_IRA     0xE2        /*! Internet routing address */

/*! Pre-message response signals */
/*! From the receiver to the transmitter. */
#define T30_CFR     0x84        /*! Confirmation to receive */
#define T30_FTT     0x44        /*! Failure to train */
#define T30_CTR     0xC4        /*! Response for continue to correct */
#define T30_CSA     0x24        /*! Called subscriber internet address */

/*! Post-message commands */
#define T30_EOM     0x8E        /*! End of message */
#define T30_MPS     0x4E        /*! Multipage signal */
#define T30_EOP     0x2E        /*! End of procedure */
#define T30_PRI_EOM 0x9E        /*! Procedure interrupt - end of procedure */
#define T30_PRI_MPS 0x5E        /*! Procedure interrupt - multipage signal */
#define T30_PRI_EOP 0x3E        /*! Procedure interrupt - end of procedure */
#define T30_EOS     0x1E        /*! End of selection */
#define T30_PPS     0xBE        /*! Partial page signal */
#define T30_EOR     0xCE        /*! End of retransmission */
#define T30_RR      0x6E        /*! Receiver ready */

/*! Post-message responses */
#define T30_MCF     0x8C        /*! Message confirmation */
#define T30_RTP     0xCC        /*! Retrain positive */
#define T30_RTN     0x4C        /*! Retrain negative */
#define T30_PIP     0xAC        /*! Procedure interrupt positive */
#define T30_PIN     0x2C        /*! Procedure interrupt negative */
#define T30_PPR     0xBC        /*! Partial page request */
#define T30_RNR     0xEC        /*! Receive not ready */
#define T30_ERR     0x1C        /*! Response for end of retransmission */
#define T30_FDM     0xFC        /*! File diagnostics message */

/*! Other line control signals */
#define T30_DCN     0xFA        /*! Disconnect */
#define T30_CRP     0x1A        /*! Command repeat */
#define T30_FNV     0xCA        /*! Field not valid */
#define T30_TNR     0xEA        /*! Transmit not ready */
#define T30_TR      0x6A        /*! Transmit ready */
#define T30_PID     0x6C        /*! Procedure interrupt disconnect */

/*! Something only use as a secondary value in error correcting mode */
#define T30_NULL    0x00        /*! Nothing to say */

/*! Information frame types used for error correction mode, in T.4 */
#define T4_FCD      0x06        /*! Facsimile coded data */
#define T4_RCP      0x86        /*! Return to control for partial page */

#endif
/*- End of file ------------------------------------------------------------*/