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Ricoh B230 Service Manual

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    							Bit Switches 
SM 81 B786 
B786 
Fax Option 
memory transmission 
0: Disabled 1: Enabled transmission. 
3-6 Not used  Do not change the settings. 
 
G3-2 Switch 01 [SP No. 1-106-002] 
No FUNCTION COMMENTS 
0-3 Not used  Do not change the settings. 
4 DIS frame length 
0: 10 bytes, 1: 4 bytes 1: The bytes in the DIS frame after the 4th byte 
will not be transmitted (set to 1 if there are 
communication problems with PC-based faxes 
which cannot receive the extended DIS frames). 
5 Not used  Do not change the setting. 
6 CED/ANSam transmission 
0: Disabled 
1: Enabled Do not change this setting, unless the 
communication problem is caused by the 
CED/ANSam transmission. 
7 Not used  Do not change the setting. 
 
G3-2 Switch 02 [SP No. 1-106-003] 
No FUNCTION COMMENTS 
0 G3 protocol mode used 
0: Standard and non-standard 
1: Standard only Change this bit to 1 only when the other end can 
only communicate with machines that send T.30-
standard frames only. 
1: Disables NSF/NSS signals (these are used in 
non-standard mode communication) 
1-4 Not used  Do not change the settings. 
5 Use of modem rate history for 
transmission using 
Quick/Speed Dials 
0: Disabled 
1: Enabled 0: Communications using Quick/Speed Dials 
always start from the highest modem rate. 
1: The machine refers to the modem rate history 
for communications with the same machine when 
determining the most suitable rate for the current 
communication. 
6 Not used  Do not change the settings. 
7 Short preamble 
0: Disabled, 1: Enabled Refer to Appendix B in the Group 3 Facsimile 
Manual for details about Short Preamble. 
 
G3-2 Switch 03 [SP No. 1-106-004] 
No FUNCTION COMMENTS
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    							Bit Switches 
B786 82  SM 
0 DIS detection number  
(Echo countermeasure) 
0: 1 
1: 2 0: The machine will hang up if it receives the 
same DIS frame twice. 
1: Before sending DCS, the machine will wait for 
the second DIS which is caused by echo on the 
line. 
1 Not used  Do not change the settings. 
2 V.8 protocol 
0: Disabled 
1: Enabled 0: V.8/V.34 communications will not be possible.  
ƒ  Do not set to 0 unless the line condition is 
always bad enough to slow down the 
data rate to 14.4 kbps or lower. 
3 ECM frame size 
0: 256 bytes 
1: 64 bytes Keep this bit at “0” in most cases. 
4 CTC transmission conditions 
0: After one PPR signal 
received 
1: After four PPR signals 
received (ITU-T standard) 0: When using ECM in non-standard (NSF/NSS) 
mode, the machine sends a CTC to drop back the 
modem rate after receiving a PPR, if the following 
condition is met in communications at 14.4, 12.0, 
9.6, and 7.2 kbps. 
 
NTransmit- Number of transmitted frames 
NResend- Number of frames to be retransmitted 
 
1: When using ECM, the machine sends a CTC to 
drop back the modem rate after receiving four 
PPRs. 
 
PPR, CTC: These are ECM protocol signals. 
This bit is not effective in V.34 communications. 
5 Modem rate used for the next 
page after receiving a 
negative code (RTN or PIN) 
0: No change, 1: Fallback 1: The machine’s tx modem rate will fall back 
before sending the next page if a negative code is 
received. This bit is ignored if ECM is being used. 
6 Not used  Do not change the settings. 
7 Not used  Do not change the settings. 
 
G3-2 Switch 04 [SP No. 1-106-005] 
No FUNCTION COMMENTS 
0-3 Training error detection 
threshold 0 - F (Hex); 0 - 15 bits 
If the number of error bits in the received TCF is 
below this threshold, the machine informs the 
sender that training has succeeded. 
4-7 Not used  Do not change the settings.
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    							Bit Switches 
SM 83 B786 
B786 
Fax Option 
 
G3-2 Switch 05 [SP No. 1-106-006] 
No FUNCTION COMMENTS 
Initial Tx modem rate 
Bit 3  Bit 2  Bit 1  Bit 0  bps 
0 0 0 1 2.4k 
0 0 1 0 4.8k 
0 0 1 1 7.2k 
0 1 0 0 9.6k 
0 1 0 1 12.0k 
0 1 1 0 14.4k 
0 1 1 1 16.8k 
1 0 0 0 19.2k 
1 0 0 1 21.6k 
1 0 1 0 24.0k 
1 0 1 1 26.4k 
1 1 0 0 28.8k 
1 1 0 1 31.2k 
1 1 1 0 33.6k 
0-3 
Other settings - Not used These bits set the initial starting modem rate for 
transmission. 
Use the dedicated transmission parameters if 
you need to change this for specific receivers. 
If a modem rate 14.4 kbps or slower is selected, 
V.8 protocol should be disabled manually. 
Cross reference 
V.8 protocol on/off - G3 switch 03, bit2 
4-5 Initial modem type for 9.6 k or 
7.2 kbps. 
Bit 5: 0, Bit 4: 0 = V.29 
Bit 5: 0, Bit 4: 1 = V.17 
Bit 5: 1, Bit 4: 0 = V.34 
Bit 5: 1, Bit 4: 1 = Not used These bits set the initial modem type for 9.6 and 
7.2 kbps, if the initial modem rate is set at these 
speeds. 
6-7 Not used  Do not change the settings.
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    							Bit Switches 
B786 84  SM 
G3-2 Switch 06 [SP No. 1-106-007] 
No FUNCTION COMMENTS 
Initial Rx modem rate 
Bit 3  Bit 2  Bit 1  Bit 0  bps 
0 0 0 1  2.4k 
0 0 1 0  4.8k 
0 0 1 1  7.2k 
0 1 0 0  9.6k 
0 1 0 1  12.0k 
0 1 1 0  14.4k 
0 1 1 1  16.8k 
1 0 0 0  19.2k 
1 0 0 1  21.6k 
1 0 1 0  24.0k 
1 0 1 1  26.4k 
1 1 0 0  28.8k 
1 1 0 1  31.2k 
1 1 1 0  33.6k 
0-3 
Other settings - Not used ƒ  These bits set the initial starting modem 
rate for reception. 
ƒ  Use a lower setting if high speeds pose 
problems during reception. 
ƒ  If a modem rate 14.4 kbps or slower is 
selected, V.8 protocol should be 
disabled manually. 
Cross reference: 
V.8 protocol on/off - G3 switch 03, bit2 
Modem types available for reception 
Bit 7  Bit 6  Bit 5  Bit 4  Setting 
0 0 0 1  V.27ter 
0 0 1 0 V.27ter,V.29
0 0 1 1 V.27ter, 
V.29, V.33 
0 1 0 0 V.27ter, 
V.29, 
V.17/V.33 
0 1 0 1 V.27ter, 
V.29, 
V.17/V33, 
V.34 
4-7 
Other settings - Not used ƒ  The setting of these bits is used to 
inform the transmitting terminal of the 
available modem type for the machine 
in receive mode. 
ƒ  If V.34 is not selected, V.8 protocol must 
be disabled manually. 
Cross reference: 
V.8 protocol on/off - G3 switch 03, bit2
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    							Bit Switches 
SM 85 B786 
B786 
Fax Option 
 
G3-2 Switch 07 [SP No. 1-106-008] 
No FUNCTION COMMENTS 
0-1 PSTN cable equalizer 
(tx mode: Internal) 
Bit 1: 0, Bit 0: 0 = None 
Bit 1: 0, Bit 0: 1 = Low 
Bit 1: 1, Bit 0: 0 = Medium 
Bit 1: 1, Bit 0: 1 = High Use a higher setting if there is signal loss at higher 
frequencies because of the length of wire between 
the modem and the telephone exchange. 
Use the dedicated transmission parameters for 
specific receivers. 
Also, try using the cable equalizer if one or more 
of the following symptoms occurs. 
Communication error 
Modem rate fallback occurs frequently. 
 
ƒ  This setting is not effective in V.34 
communications. 
2-3 PSTN cable equalizer 
(rx mode: Internal) 
Bit 3: 0, Bit 2: 0 = None 
Bit 3: 0, Bit 2: 1 = Low 
Bit 3: 1, Bit 2: 0 = Medium 
Bit 3: 1, Bit 2: 1 = High Use a higher setting if there is signal loss at higher 
frequencies because of the length of wire between 
the modem and the telephone exchange. 
Also, try using the cable equalizer if one or more 
of the following symptoms occurs. 
Communication error with error codes such as  
 0-20, 0-23, etc. 
Modem rate fallback occurs frequently. 
 
ƒ  This setting is not effective in V.34 
communications. 
4 PSTN cable equalizer 
(V.8/V.17 rx mode: External) 
0: Disabled 
1: Enabled Keep this bit at “1”. 
5 Not used  Do not change the settings. 
6 Parameter selection for dial 
tone detection 
0: Normal parameter 
1: Specific parameter 0: This uses the fixed table in the ROM for dial 
tone detection. 
1: This uses the specific parameter adjusted with 
SRAM (69ECBEH - 69ECDEH). Select this if the 
dial tone cannot be detected when the Normal 
parameter: 0 is selected. 
7 Not used  Do not change the settings. 
 
G3-2 Switch 08 - Not used (do not change the settings) 
G3-2 Switch 09 - Not used (do not change the settings)
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    							Bit Switches 
B786 86  SM 
G3-2 Switch 0A [SP No. 1-106-011] 
No FUNCTION COMMENTS 
0-1 Maximum allowable carrier 
drop during image data 
reception 
Bit 1: 0, Bit 0: 0 = 200 (ms) 
Bit 1: 0, Bit 0: 1 = 400 (ms) 
Bit 1: 1, Bit 0: 0 = 800 (ms) 
Bit 1: 1, Bit 0: 1 = Not used These bits set the acceptable modem carrier drop 
time. 
Try using a longer setting if error code 0-22 is 
frequent. 
2 Select cancellation of high-
speed RX if carrier signal 
lost while receiving 
0: Off 
1: On This switch setting determines if high-speed 
receiving ends if the carrier signal is lost when 
receiving during non-ECM mode 
3 Not used  Do not change the settings 
4 Maximum allowable frame 
interval during image data 
reception. 
0: 5 s 1: 13 s This bit set the maximum interval between EOL 
(end-of-line) signals and the maximum interval 
between ECM frames from the other end. 
Try using a longer setting if error code 0-21 is 
frequent. 
5 Not used  Do not change the settings. 
6 Reconstruction time for the 
first line in receive mode 
0: 6 s 1: 12 s When the sending terminal is controlled by a 
computer, there may be a delay in receiving page 
data after the local machine accepts set-up data 
and sends CFR. This is outside the T.30 
recommendation. But, if this delay occurs, set this 
bit to 1 to give the sending machine more time to 
send data. 
Refer to error code 0-20. 
ITU-T T.30 recommendation: The first line should 
come within 5 s of CFR. 
7 Not used  Do not change the settings. 
 
G3-2 Switch 0B - Not used (do not change the settings.) 
G3-2 Switch 0C - Not used (do not change the settings.) 
G3-2 Switch 0D - Not used (do not change the settings) 
G3-2 Switch 0E - Not used (do not change the settings) 
G3-2 Switch 0F - Not used (do not change the settings)
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    							Bit Switches 
SM 87 B786 
B786 
Fax Option 
4.3.7  IP FAX SWITCHES 
IP Fax Switch 00 [SP No. 1-111-001] 
No. FUNCTION COMMENTS 
0 Not used   Do not change this setting. 
1 IP Fax Transport 
0: TCP, 1: UDP Selects TCP or UDP protocol for IP-Fax 
2 IP Fax single port selection 
0: OFF, 1: ON (enable) Selects single data port. 
3 IP Fax double ports (single data 
port) selection 
0: OFF, 1: ON (enable) Selects whether IP-Fax uses a double port. 
4 IP Fax Gatekeeper  
0: OFF, 1: ON (enable) Enables/disables the communication via the 
gatekeeper for IP-Fax. 
5 IP Fax T30 bit signal reverse 
0: LSB first, 1: MSB first Reverses the T30 bit signal. 
6 IP Fax max bit rate setting 
0: Not affected, 1: Affected When 0 is selected, the max bit rate does 
not affect the value of the DIS/DCS. 
When 1 is selected, the max bit rate affects 
the value of the DIS/DCS. 
7 IP Fax received telephone number 
confirmation 
0: No confirmation, 1: 
Confirmation When 0 is selected, fax data is received 
without checking the telephone number. 
When 1 is selected, fax data is received 
only when confirming that the telephone 
number from the sender matches the 
registered telephone number in this 
machine. If this confirmation fails, the line is 
disconnected. 
 
IP-Fax Switch 01 
No. FUNCTION COMMENTS 
Select IP FAX Delay Level 
Bit3 Bit2 Bit1 Bit0  Setting 
0 0 0 0 Level 0 
0 0 0 1 Level 1 
0 0 1 0 Level 2 
0 0 1 1 Level 3 
0-3 
     Raise the level by selecting a higher setting 
if too many transmission errors are 
occurring on the network. 
If TCP/UDP is enabled on the network, raise 
this setting on the T.30 machine. Increasing 
the delay time allows the recovery of more 
lost packets. 
If only UDP is enabled, increase the number 
of redundant packets. 
Level 1~2: 3 Redundant packets 
Level 3: 4 Redundant packets
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    							Bit Switches 
B786 88  SM 
4-7  IP Fax preamble wait time setting Selects the preamble wait time. 
[00 to 0f]  
There are 16 values in this 4-bit binary 
switch combination.  
Waiting time: set value level x 100 ms 
Max: 0f (1500 ms) Min: 00 (No wait time) 
The default is 0000 (00H). 
 
IP Fax Switch 02 [SP No. 1-111-003] 
No. FUNCTION COMMENTS 
0 IP Fax bit signal reverse setting 
0: Maker code setting 
1: Internal bit switch setting  When 0 is selected, the bit signal reverse 
method is decided by the maker code. 
When 1 is selected, the bit signal reverse 
method is decided by the internal bit switch. 
When communicating between IP Fax 
devices, LSB first is selected.) 
1 IP Fax transmission speed setting 
0: Modem speed 
1: No limitation Selects the transmit speed for IP Fax 
communication. 
2 SIP transport setting  
0: TCP 
1: UDP This bit switch sets the transport that has 
priority for receiving IP Fax data. 
This function is activated only when the 
sender has both TCP and UDP.  
3 CCM connection 
0: No CCM connection 
1: CCM connection When 1 is selected, only the connection 
call message with H.323 or no tunneled 
H.245 is transmitted via CCM. 
4 Message reception selection from 
non-registered SIP server  
0: Answer 
1: Not answer 0: This answers the INVITE message from 
the SIP server not registered for the 
machine. 
1: This does not receive the INVITE 
message from the SIP server not registered 
for the machine and send a refusal 
message.  
5 ECM communication setting 
0: No limit for image compression 
1: Limit for image compression 0: This does not limit the type of the image 
compression with ECM communication. 
1: When the other end machine is Ciscco, 
this permits the image compression other 
than JBIG or MMR with ECM 
communication.  
6-7 Not used  Do not change these settings.
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    							Bit Switches 
SM 89 B786 
B786 
Fax Option 
IP Fax Switch 03 [SP No. 1-111-004] 
No. FUNCTION COMMENTS 
0 Effective field limitation for G3 
standard function information 
0: OFF, 1: 4byte (DIS) Limits the effective field for standard G3 
function information. 
1 Switching between G3 standard 
and G3 non standard 
0: Enable switching 
1: G3 standard only Enables/disables switching between G3 
standard and G3 non-standard. 
2  Not used.  Do not change this setting. 
3 ECM frame size selection at 
transmitting 
0: 256byte, 1: 64byte Selects the ECM frame size for sending. 
4 DIS detection times for echo 
prevention 
0: 1 time, 1: 2 times Sets the number of times for DIS to detect 
echoes.  
5 CTC transmission selection 
0: PPRx1 
1: PPRx4 When 0 is selected, the transmission 
condition is decided by error frame numbers.
When 1 is selected, the transmission 
condition is based on the ITU-T method. 
6 Shift down setting at receiving 
negative code 
0: OFF, 1: ON Selects whether to shift down when negative 
codes are received. 
7 Not used  Do not change this setting. 
 
IP Fax Switch 04 [SP No. 1-111-005] 
No. FUNCTION COMMENTS 
0 
1 
2 
3 TCF error threshold Sets the TCF error threshold level. 
[00 to 0f] 
The default is 1111 (0fH). 
4-7 Not used  Do not change these settings. 
 
IP Fax Switch 05 [SP No. 1-111-006]  
No. FUNCTION COMMENTS 
0-3 Modem bit rate setting for transmission 
Sets the modem bit rate for transmission. The default is 0110 (14.4K bps).
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    							Bit Switches 
B786 90  SM 
Bit 3  Bit 2  Bit 1  Bit 0   
0 0  0 1 2400 bps 
0 0  1 1 4800 bps 
0 0  1 1 7200 bps 
0 1  0 0 9600 bps 
0 1  0 1 12.0 Kbps 
0 1  1 0 14.4 Kbps 
0 1  1 1 16.8 Kbps 
1 0  0 0 19.2 Kbps 
1 0  0 1 21.6 Kbps 
1 0  1 0 24.0 Kbps 
1 0  1 1 26.4 Kbps 
1 1  0 0 28.8 Kbps 
1 1  0 1 31.2 Kbps 
1 1  1 0 33.6 Kbps 
4-5 Modem setting for transmission 
Sets the modem for transmission. 
The default is 00 (V29). 
Bit 5: 0, Bit 4: 0 = V29 
Bit 5: 0, Bit 4: 1 = V17 
Bit 5: 1, Bit 4: 0 = V34* 
Bit 5: 1, Bit 4: 1 = Not used 
*V34 is not supported for IP-Fax communication. 
6-7 Not used  Do not change these settings. 
 
IP Fax Switch 06 [SP No. 1-111-007] 
No. FUNCTION COMMENTS 
Modem bit rate setting for reception 
Sets the modem bit rate for reception. The default is 0110 (14.4K bps). 
Bit 3  Bit 2   Bit 1  Bit 0   
0 0  0 1 2400 bps 
0 0  1 0 4800 bps 
0 0  1 1 7200 bps 
0-3 
0 1  0 0 9600 bps
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