PIP | Procedure Interrupt Positive |
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| Informs that the image signals have been received correctly and requests the operator’s |
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| reply by telephone or to return to the beginning of the phase B to continue the communica- |
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| tion (i.e., CALL Request, etc.). |
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PIN | Procedure Interrupt Negative |
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| Informs that the image signals have not been received correctly and requests for operator’s |
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| reply by telephone or to return to the beginning of the phase B to continue the communica- |
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| tion. |
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| Procedure Interrupt EOM |
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| Command similar to EOM. Operation by operator is necessary. |
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| Procedure Interrupt MPS |
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| Command similar to MPS. Operation by operator is necessary. |
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| Procedure Interrupt EOP | 3 |
| Command similar to EOP. Operation by operator is necessary. |
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DCN | Disconnect |
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| Command to disconnect the FAX line and to connect the telephone line. Reply from the |
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| other side is not necessary. |
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RR | Receive Ready |
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| Informs that the FAX is ready to receive documents and requests for data to set the recep- |
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| tion mode. (ECM mode) |
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RNR | Receive Not Ready |
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| Informs that the FAX is not in the receivable state. (ECM mode) |
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PPR | Partial Page Request |
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| Informs that a part of page (ECM block) has not been received correctly. The number of the |
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| frame needs to be corrected is informed by the FIF. (EC mode) |
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PPS | Partial Page Signal |
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| Informs that a part of page (ECM block) or one page has been transmitted. (EC mode) |
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CTC | Continue to Correct |
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| Replies to the 4th PPR which requests to correct the image signal; informs that the trans- |
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| mitting station will continue to correct the frame data. (ECM mode) |
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CTR | Response for Continue to Correct |
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| Replies to CTC and informs that the receiving station has received and accepted the CTC. |
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| (EC mode) |
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EOR | End of Retransmission |
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| Informs that the transmitting station has completed the correction of the error frame data |
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| (binary signal) of the previous ECM block. (ECM mode) |
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ERR | Response for End Retransmission |
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| Replies to EOR and requests to transmit the image signal of the next ECM block. (ECM |
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| mode) |
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RTP | Retrain Positive |
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| Informs that the message has been received completely and that the subsequent message |
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| can be continued after receiving the synchronization signal and CFR signal. |
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CRP | Command Repeat |
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| Requests to resend all the commands including optional frames because the preceding |
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| command has been received incorrectly. |
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| DIALING/COMMUNICATION CONTROL |
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