Protocol log

Note / 補足
  • The protocol log can only output the log for the previous communication, so it must be printed immediately after a communication error occurs.
  • This report can be printed from the panel menu. It is also possible to automatically print each communication by changing the settings.
  • If communication has not started before the outgoing/incoming call operation (up to phase A but not to phase B), this log will be blank.


Printing Procedure

Manual

[Fax] > [Menu] > [Fax Report Output] > [Protocol log]


Setting Method

Automatic print settings

Fax parameter setting mode #006 allows you to set automatic printing for each communication.
See “Communication Protocol trace” in “Service parameters”.

Save only in case of error/Print setting

Fax parameter Setting mode #005 can be set to save/print only error communications.
Refer to "Communication protocol monitor log" in the service parameter table.

Save settings.

Can set the protocol log to be saved/printed in Fax parameter Setting mode #007.
Refer to "Communication protocol monitor log" in the service parameter table.


Output Sample

(1) Subject Report name *Report name is protocolMonitorwritten as log
PAGE. Number of pages to be reported (number of pages/total number of pages)
Date and time

Printed time (yyyy.mm.dd hh:mm)
(2) Name Registered sender name
Fax Registered sender name
(3) Reception number

Job number
*A common number is displayed in other reports and job management.
Date Time Starting time of communication
Type

Sending/Receiving/Polling Sending/Polling Reception/PC Sending/Forwarding
Destination number 「Indications of destination number (in priority order)」
Communication time mm:ss
Number of pages

Memory sending: Number of pages of communication succeeded/total number of pages
Direct sending/reception: Number of pages of communication succeeded
Communication result

Succeeded: OK
Failed: Error details (Line Busy, No answer, Communication error, No tones, Line is not connected, Incorrect port connection, Cancel, Electricity failure, etc.)
Error xxx (Report Format = only when set to Detail)
(4) DIS(DTC) / DCS 「How to read DIS(DTC)/DCS」
(5) Command / Response log 「How to read the Command / Response log」


How to read DIS(DTC)/DCS

Before starting communication, the sender and the receiver communicate their functions to each other before starting communication, and determine the communication function and speed.

The receiving fax machine transmits its own functions to the sending fax machine using a DIS (DTC) signal. The sending fax machine receives the DIS signal from the receiving fax machine, selects the maximum function set by the sending side, which is a function that can be used by both the sending and receiving sides, and receives the selected communication mode using the DCS signal. Send it to the side fax.

By checking the DIS (DTC) information, you can find out the contents of the capability declaration of the receiving fax machine, and by checking the DCS information, you can find out the communication mode selected by the sending fax machine.

Only one protocol log is recorded and printed for each communication. If the protocol log becomes too long to fit on one page due to multi-page communication, the first protocol log will be deleted and only the last protocol log will be recorded and printed.

DIS(DTC)/DCS records and prints on top of the protocol log so that the contents can be seen even if the first protocol log is deleted.

Fax communications are made in accordance with ITU recommendations, and the main relevant recommendations are "T.30" and "T.4".

Documents of these recommendations are published online and can be downloaded from the following sites.

DIS(DTC)/DCS reads the contents of FIF (Facsimile Information Field) by referring to the bit assignment table of DIS(DTC)/DCS. The DIS(DTC)/DCS bit allocation table is described in "T.30 Document facsimile transmission procedures over general switched telephone networks".

  • 5.3.6.2 Facsimile Information Field (FIF) Table 5-1 JT-T30 (ITU-T T.30)


DIS (DTC) Capability Bit Table

To refer to the bit assignment table and data, rearrange the upper and lower bits every 2 bytes of data.

DIS example: 8020C28AC480D5838018

  • FCS=80
  • FIF=20 C2 8A C4 80 D5 83 80 18

hex

2

0

C

2

8

A

bin

0

0

1

0

0

0

0

0

1

1

0

0

0

0

1

0

1

0

0

0

1

0

1

0

bit no.

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

9

24

23

22

21

20

19

18

17
bit no. DIS/DTC data Description
1 1 Store-and-forward Internet facsimile simple mode (TTC standard JT-T37) 0
2 Pending 0
3 Real-time Internet facsimile (TTC standard JT-T38) 0
4 3rd generation wireless mobile telecommunication network 0
5 Pending 0
6 ITU-T Recommendation V.8 Capability 1 Function enable
7 Frame size 0=256 Octet priority 1=64 0 ECM frame size =256
8 Pending 0
2 9 Ready to transfer (polling) facsimile documents 0 No polling fax is ready
10 Operation#1 of received fax 1 Function enable
11 Data signal speed
00000=V.27terFB     0010=Not used 0001=Not used               0011=Not used
0100=V.27ter          0110=  Pending    0101= Pending                     0111= Pending
1000=V.29              1010= Not used  1001= Not used                1011= Not used
1100=V.27ter,V.29 1110= Disable     1101=V.27ter,V.29,V17 　1111=Pending		 0 V.27terFB
Notice) When V8 mode (S-G3) starts, this bit becomes invalid (0000).
12 0
13 0
14 0
15 Linear density (fine / FINE) R8 x 7.7 l / mm or 200 x 200 dpi 1 Function enable
16 Coding method: MMR 1 Function enable
3 17 Recording width ability
00=A4 10=A4/B4
01=A4/B4/A3 11=Disable		 1 A4/B4/A3
18 1
19 Recording width ability
00=A4(297mm) 10=A4(297mm) and B4(364mm)
01= unlimited 11= disable		 0 Unlimited
20 1
21 Minimum scan time capability of the receiver (Linear density = Std / Fine)
000=20/20ms 100=5/5ms 101=40/20ms
001=40/40ms 011=10/5ms 111=0/0ms
010=10/10ms 110=20/10ms		 0 20/20ms
22 0
23 0
24 Extend field 1 With extension


DIS example: 8020C28AC480D5838018

  • FCS=80
  • FIF=20 C2 8A C4 80 D5 83 80 18
hex C 4 8 0 D 5
bin 1 1 0 0 0 1 0 0 1 0 0 0 0 0 0 0 1 1 0 1 0 1 0 1
bit no. 32 31 30 29 28 27 26 25 40 39 38 37 36 35 34 33 48 47 46 45 44 43 42 41
bit no. DIS/DTC data Description
4 25 Pending 0
26 Uncompressed mode 0
27 Error correction mode (ECM) 1 Function enable
28 Set to 0 0
29 Pending 0
30 Pending 0
31 Coding method(MMR T.6) 1 Function enable
32 Extend field 1 With extension
5 33 Invalid field signal capability 0
34 Multiple polling capability (DIS) Multiple polling instructions (DTC) 0
35 Polling Sub address Capability (DIS) PSA Polling Sub address Send (DTC) 0
36 Coding method(T.43) 0
37 plane interleave 0
38 32k ADPCM speech coding(TTC JT-G726) 0
39 Pending for using extended speech coding 0 Function enable
40 Extend field 1 With extension
6 41 Linear density (high fine / S-FINE) R8 x 15.4 l / mm41 1 Function enable
42 Linear destiy(300) 　300 x 300 dpi 0
43 Linear density (Super high fine / E-FINE) R16 x 15.4 l / mm or 400 x 400 dpi 1 1 Function enable
44 Inch resolution selection 0 0
45 Millimeter resolution selection 0 1 Millimeter resolution selection 0
46 Minimum scan line time capability at high linear density 0:T15.4=T7.7 1:T15.4=1/2 T7.7 0 0
47 Selective polling capability (DIS) Selective polling instructions (DTC) 1
48 Extend field 1


DIS example: 8020C28AC480D5838018

  • FCS=80
  • FIF=20 C2 8A C4 80 D5 83 80 18
hex 8 3 8 0 1 8
bin 1 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0
bit no. 56 55 54 53 52 51 50 49 64 63 62 61 60 59 58 57 72 71 70 69 68 67 66 65
bit no. DIS/DTC data Description
7 49 Sub address capability 1 Function enable
50 Password / transmitter identification ability (DIS) Password transmission (DTC) 1 Function enable
51 Data file transfer (polling) ready 0
52 Pending 0
53 Binary File Transfer (BFT) 0
54 Document transfer mode (DTM) 0
55 EDIFACT transfer(EDI) 0
56 Extend field 1 With extension
8 57 57 Basic Transfer Mode (DTM) 0
58 Pending 0
59 Character / mixed mode document transfer (polling) ready 0
60 Character mode 0
61 Pending 0
62 mixed mode 0
63 Pending 0
64 Extend field 1 With extension
9 65 processable mode26 0
66 Digital network capability 0
67 Full-duplex / half-duplex capacity 0: Half-duplex control 1: Half-duplex / full-duplex control 0
68 Coding mode (JPEG) 1 Function enable
69 Full color mode 1 Function enable
70 Set to 0 0
71 Bit / Pixel / Element 0
72 Extend field 0 Without extension


DCS Bit Assignment for Capabilities

To refer to the bit assignment table and data, rearrange the upper and lower bits every 2 bytes of data.

DCS example: 830042F844

  • FCS=83
  • FIF=00 42 F8 44
hex 0 0 4 2 F 8 4 4
bin 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 1 1 1 1 0 0 0 0 1 0 0 0 1 0 0
bit no. 8 7 6 5 4 3 2 1 16 15 14 13 12 11 10 9 24 23 22 21 20 19 18 17 32 31 30 29 28 27 26 25
bit no. DIS/DTC data Description
1 1 Store-and-forward Internet facsimile simple mode (TTC standard JT-T37) 0
2 Pending 0
3 Real-time Internet facsimile (TTC standard JT-T38) 0
4 3rd generation wireless mobile telecommunication network 0
5 Pending 0
6 Disable 0
7 Disable 0
8 Pending 0
2 9 Set to 0 0 No polling fax is ready
10 Operation#1 of received fax 1 Function enable
11 Data signal speed
00000=V.27terFB     0010=Not used 0001=Not used               0011=Not used
0100=V.27ter          0110=  Pending    0101= Pending                     0111= Pending
1000=V.29              1010= Not used  1001= Not used                1011= Not used
1100=V.27ter,V.29 1110= Disable    1101=V.27ter,V.29,V17  1111= Pending		 0 V.27terFB
Notice) When V8 mode (S-G3) starts, this bit becomes invalid (0000).
12 0
13 0
14 0
15 Linear density (fine / FINE) R8 x 7.7 l / mm or 200 x 200 dpi 1 Function enable
16 Coding method: MMR 0 Function enable
3 17 Recording width ability
00=A4 10=A4/B4
01=A4/B4/A3 11=Disable		 0 A4
18 0
19 Recording width ability
00=A4(297mm) 10=A4(297mm) and B4(364mm)
01= unlimited 11= disable		 0 Unlimited
20 1
21 Minimum scan time capability of the receiver (Linear density = Std / Fine)
000=20/20ms 100=5/5ms 101=40/20ms
001=40/40ms 011=10/5ms 111=0/0ms
010=10/10ms 110=20/10ms		 1 0 ms
22 1
23 1
24 Extend field 1 With extension
4 25 Pending 0
26 Uncompressed mode 0
27 Error correction mode (ECM) 1 ECM
28 Frame size 0=256oct. 1=64oct. 0 frame size 256oct
29 Pending 0
30 Pending 0
31 Coding method(MMR T.6) 1 MMR
32 Extend field 0 With extension


How to read the Command / Response log

The following explains the T.30 Protocol command / response in Fax log. The communication procedure can be checked in detail.

Example) Type = Reception

Time (10ms)

direction

Command / Response name

 data Description
01136

CSI

402020202020202020343332312035353520323430

The value in which the called terminal identification signal (numeric ID) is registered with the originating number of the receiving receiver is displayed.
The number is entered with ASCII character codes. (Same as TSI)
FCF=40
FIF=020202020202020343332312035353520323430
(ASCII character code 20 = space (S), 30-39 = 0-9, 2b = +)
ASCII conversion → “SSSSSSSS1234S555S240”
Reverse order → “042 555 1234”
01136

DIS

8020C28AC480D5838018

Receive digital identification signal (reception capability)
01257

TSI

432020202020202020202031333231313233353330

The value that registers the sending terminal identification signal (numeric ID) with the originating number of the sending transmitter is displayed.
The number is entered with ASCII character codes. (Same as CSI)
FCF=43
FIF=2020202020202020202031333231313233353330
(ASCII character code 20 = space (S), 30-39 = 0-9, 2b = +)
ASCII conversion --> “SSSSSSSSSS1321123530”
Reverse order --> “0353211231”
01265

DCS 830042F844

Send digital command signal (transmission mode)

TCF

Send training signal (V17 / V29 / V27ter only)
01268

CFR 84 Received a confirmation for receive signal.
01331

PIX

FF [33,600 bps (V.34) / MMR / A4 / 8x7.7 / 0(E:0)]

Received the 1st page of image signal.The communication status is described within [ ].
Communication speed (protocol): 33.6kbps (V.34)
Coding method: MMR
Recording paper width: A4
Resolution: 8x7.7 (fine)
Number of lines (including error lines): 0 (E: 0) * When ECM = OFF
03130

PPS - EOP BF2F0000FD

Received a end of procedure signal (the 1st page finished without next page).
FCF = BF2F, FIF = 0000FD (00 = 1st page, 00 = 1st block, FD = 254 frames)
If the number of frames exceeds 256, separate the pages by PPS-NULL and send them separately.
The frame size of PPS-NULL is always FF.
PPS-MPS is an ECM mode signal.
Use MPS in non-ECM mode.
03131

PPR

BC00000000F8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Since there was an error in received PIX, specifies the error frame and requests retransmission. (The signal of ECM mode)
Error frame specifying method: “FFFF” (x1) represents 1 to 16 frames.
FFFF x 16 represents 1 to 256 frames.
Since 254 frames were transmitted, 1 is set for 255 to 256 frames.
Set to 1 for a reception error frame.
Since the frame specification is 0000 0000 F8FFF FFFF ..., 35 frames from 1 to 35 succeeded and 219 frames from 36 to 254 have been requested to be retransmitted.
03239

PIX

FF [33,600 bps (V.34) / MMR / A4 / 8x7.7 / 0(E:0)]

A retransmission request frame for the first page of the image signal is received.The communication status is written in [ ].
Communication speed (protocol): 33.6kbps (V.34)
Coding method: MMR
Recording paper width: A4
Resolution: 8x7.7 (fine)
Number of lines (including error lines): 0 (E: 0) * When ECM = OFF
04770

PPS - EOP BF2F0000DA

Received a end of procedure signal (the 1st page finished without next page).
FCF = BF2F, FIF = 0000DA (00 = 1st page, 00 = 1st block, DA = 219 frames)
04771

PPR

BC0000000000000000000000F0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Since there was an error in received PIX, specifies the error frame and requests retransmission. (The signal of ECM mode)
Error frame specification method: 1 FFFF represents 1 to 16 frames.
FFFF x 16 represents 1 to 256 frames.
Set to 1 for a reception error frame.
Since the frame specification is 0000 0000 0000 0000 0000 00F0 FFFF ~, 57 frames 36 to 92 have succeeded and 162 frames with frame numbers 93 to 254 have been requested to be retransmitted.
03239

PIX

FF [33,600 bps(V.34) / MMR / A4 / 8x7.7 / 960(E:1) ]

Received the 1st page of image signal.The communication status is described within [ ].
Communication speed (protocol): 33.6kbps (V.34)
Coding method: MMR
Recording paper width: A4
Resolution: 8x7.7 (fine)
Number of lines (including error lines): 960 (E: 1) ⇒ Up to 960 lines have been received and an error has occurred.
06612

DCN FB

The communication became impossible due to the error. It ended in failure by receiving a disconnect command from the sender.
PROTOCL V.34

Displays the protocol set at the start of communication (V.34 / V.17 / V.29)
SPEED 33,600bps (3429)

Displays the communication speed at the time of the last communication () indicates the symbol rate
CODING MMR

Displays the encoding method set at the start of communication (MMR / MR / MH)


Command/response log Display item summary
Item Description

Time (10ms)

The time when the signal was sent / received. If you pull back and forth, you will know the time of that signal.
e.g.)
02467 -> PIX
03289 -> PPS-MPS
03289 – 02467 = 822 x 10 ms = approximately 8.2s Image signal time

direction

Direction of signal transmission and reception. This differs from that of the sending or receiving in fax communication.
In the case of fax transmission, the image signal etc. is "sent" and the response signal is "receive", but in the case of fax reception, the image signal etc. is "receive" and the response signal is "send".

Command / Response name

Defined in the first 2 digits (8bit) or 4 digits (16bit) of data in the FCF (Facsimile Control Field).
Refer to the list of fax signal abbreviations (Fax Recommendation T.30).

data

Data is composed of FCF (Facsimile Control Field) and FIF (Facsimile Information Field).
The first 2 digits (8 bits) or 4 digits (16 bits) represent the FCF, and the rest represent the FIF.
Example1)
03289 -> PPS - MPS　BF4F000031

  • FCF = BF4F = PPS - MPS
  • FIF =
    00 = PC(page counter) page 1 (0x00~0xFF=0~255=+1 and page 1~256)
    00 = BC(block counter) Block 1 in page (0x00~0xFF=0~255=+1 and block 1~256)
    31 31 = FC (flame counter) Number of frames 50 (0x00 ~ 0xFF = 0 ~ 255 = +1 and frames 1 ~ 256)


1 block is 256 frames. If the number of frames exceeds 256, the page is separated by PPSNULL and transmitted separately.

Example2)
PPS-NULL　BF00xxxxFF

  • FCF = BF00
  • FIF =
    FIF of 1st PPS-NULL on 1st page:0000FF= Page 1, Block 1, Frame 256
    FIF of 2nd PPS-NULL on page 1:0001FF= Page 1, Block 2, Frame 256
    FIF of 1st PPS-NULL on 2nd page:0100FF= Page 2, Block 1, Frame 256