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Fax trace report
203
Table 21. Appropriate responses
Commands Comments Appropriate responses
(NSF) (CSI) DIS Identifying capabilities: from a manual receiver
or an auto-answer unit
(NSC) (CIG) DTC
(TSI) DCS
(NSF) (CSI) DIS
(CRP) (TSI) (NSS)
(PWD) (SEP) (CIG) DTC
(PWD) (SUB) (TSI) DCS
(NSC) (CIG) DTC Mode setting command: from calling unit (TSI) DCS
(NSF) (CSI) DIS
(PWD) (SEP) (CIG) DTC Poll operation (CRP) (TSI) (NSS)
(TSI) DCS
(TSI) (NSS)
Mode setting command: from manual
transmitter or automatic receiver
CFR
FTT
(NSC) (CIG) DTC
(PWD (SUB) (TSI) DCS This command is always followed by phasing/
training.
(NSC) (CIG) DTC
CTC Mode setting command: from the transmitter to
the receiver
(CTR)
(CRP)
(EOR-NULL) Indicates the next block transmission from the
transmitter to the receiver
(ERR)
(RNR)
(CRP)
Any one of the following:
z (EOR-EOP)
z (EOR-EOM)
z (EOR-PRI-MPS)
z (EOR-PRI-EOP)
z (EOR-PRI-EOM)
The receiver (ERR)
(RNR)
PIN
(CRP)
Any one of the following:
z MPS
z EOP
z EOM
z (PRI-MPS)
z (PRI-EOP)
z (PRI-EOM)
Post-message commands MCF
RTP
RTN
PIP
PIN
(CRP)
(PPS-NULL) Post-message command for a partial page
from the transmitter to the receiver
(PPR)
MCF
(RNR)
(CRP)
Any one of the following:
z (PPS-MPS)
z (PPS-EOP)
z (PPS-EOM)
z (PPS-PRI-MPS)
z (PPS-PRI-EOP)
z (PPS-PRI-EOM)
Post-message commands for a complete page
from the transmitter to the receiver
(PPR)
MCF
(RNR)
PIP
PIN
(CRP)
(RR) Ask for the status of the receiver: from the
transmitter to the receiver
(RNR)
(ERR)
MCF
PIP
PIN
(CRP)
DCN Phase E command None