Ricoh Mp C3000 Service Manual
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![Page 1056
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...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1055.png "Page 1056
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...")
![Page 1057
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...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1056.png "Page 1057
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...")
![Page 1058
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...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1057.png "Page 1058
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...")
![Page 1059
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)...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1058.png "Page 1059
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)...")
![Page 1060
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...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1059.png "Page 1060
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...")
![Page 1061
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...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1060.png "Page 1061
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...")
![Page 1064
Bit Switches
B786 92 SM
1: Hang up after transmitting DCN
4 Number of times for training
0: 1 time, 1: 2 times Selects the number of times training is done
at the same bit rate.
5
Space CSI transmission setting at
no CSI registration
0: Not transmitted, 1: Transmitted When 0 is selected, frame data is enabled.
When 1 is selected, the transmitted data is
all spaces.
6-7
Not used Do not change these settings.
IP Fax Switch 08 [SP No. 1-111-009]
No. FUNCTION COMMENTS
0-1 T1 timer...](http://img.usermanuals.tech/thumb/64/98663/w64_mp-c3000-service-manual-1509271621_d-1063.png "Page 1064
Bit Switches
B786 92 SM
1: Hang up after transmitting DCN
4 Number of times for training
0: 1 time, 1: 2 times Selects the number of times training is done
at the same bit rate.
5
Space CSI transmission setting at
no CSI registration
0: Not transmitted, 1: Transmitted When 0 is selected, frame data is enabled.
When 1 is selected, the transmitted data is
all spaces.
6-7
Not used Do not change these settings.
IP Fax Switch 08 [SP No. 1-111-009]
No. FUNCTION COMMENTS
0-1 T1 timer...")
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).
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
Bit Switches
SM 91 B786
B786
Fax Option
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
Modem setting for reception
Sets the modem type for reception. The default is 0100 (V27ter, V29, V17).
Bit 7 Bit 6 Bit 5 Bit 4
0 0 0 1 V27ter
0 0 1 0 V27ter, V29
0 0 1 1 V27ter, V29, V33
(invalid)
0
1 0 0 V27ter, V29, V17
0 1 0 1 V27ter, V29, V17,
V34*
4-7
*V34 is not supported for IP-Fax communication.
IP Fax Switch 07 [SP No. 1-111-008]
No. FUNCTION COMMENTS
0 TSI information
0: Not added, 1: Added Adds or does not add TSI information to
NSS(S).
1 DCN transmission setting at T1
timeout
0: Not transmitted, 1: Transmitted Transmits or does not transmit DCN at T1
timeout.
2
Not used Do not change this setting.
3 Hang up setting at DIS reception
disabled
0: No hang up Sets whether the machine disconnects after
DIS reception.
Bit Switches B786 92 SM 1: Hang up after transmitting DCN 4 Number of times for training 0: 1 time, 1: 2 times Selects the number of times training is done at the same bit rate. 5 Space CSI transmission setting at no CSI registration 0: Not transmitted, 1: Transmitted When 0 is selected, frame data is enabled. When 1 is selected, the transmitted data is all spaces. 6-7 Not used Do not change these settings. IP Fax Switch 08 [SP No. 1-111-009] No. FUNCTION COMMENTS 0-1 T1 timer adjustment Adjusts the T1 timer. The default is 00 (35 seconds). Bit 1: 0, Bit 0: 0 = 35 sec Bit 1: 0, Bit 0: 1 = 40 sec Bit 1: 1, Bit 0: 0 = 50 sec Bit 1: 1, Bit 0: 1 = 60 sec - 2-3 T4 timer adjustment Adjust the T4 timer. The default is 00 (3 seconds). Bit 3: 0, Bit 2: 0 = 3 sec Bit 3: 0, Bit 2: 1 = 3.5 sec Bit 3: 1, Bit 2: 0 = 4 sec Bit 3: 1, Bit 2: 1 = 5 sec - 4-5 T0 timer adjustment Bit 5: 0, Bit 4: 0 = 75 sec Bit 5: 0, Bit 4: 1 = 120 sec Bit 5: 1, Bit 4: 0 = 180 sec Bit 5: 1, Bit 4: 1 = 240 sec Adjusts the fail safe timer. This timer sets the interval between setup data transmission and T.38 phase decision. If your destination return is late on the network or G3 fax return is late, adjust the longer interval timer. The default is 00 (75 seconds). 6-7 Not used Do not change these settings.
NCU Parameters SM 93 B786 B786 Fax Option 4.4 NCU PARAMETERS The following tables give the RAM addresses and the parameter calculation units that the machine uses for ringing signal detection and automatic dialing. The factory settings for each country are also given. Most of these must be changed by RAM read/write (SP2- 102), but some can be changed using NCU Parameter programming (SP2-103, 104 and 105); if SP2-103, 104 and 105 can be used, this will be indicated in the Remarks column. The RAM is programmed in hex code unless (BCD) is included in the Unit column. ƒ The following addresses describe settings for the standard NCU. ƒ Change the fourth digit from “5” to “6” (e.g. 680500 to 680600) for the settings for the first optional G3 interfac e unit and from “5” to “7” (e.g. 680700) for the settings for the second optional G3 interface unit. Address Function Country/Area code for NCU parameters Use the Hex value to program the count ry/area code directly into this address, or use the decimal value to program it using SP2-103-001 Country /Area Decimal Hex Country /Area Decimal Hex France 00 00 USA 17 11 Germany 01 01 Asia 18 12 UK 02 02 Hong Kong 20 14 Italy 03 03 South Africa 21 15 Austria 04 04 Australia 22 16 Belgium 05 05 New Zealand 26 17 Denmark 06 06 Singapore 24 18 Finland 07 07 Malaysia 25 19 Ireland 08 08 China 26 1A Norway 09 09 Taiwan 27 1B Sweden 10 0A Korea 28 1C Switzerland 11 0B Turkey 32 20 Portugal 12 0C Greece 33 21 680500 Holland 13 0D Hungary 34 22
NCU Parameters B786 94 SM Address Function Spain 14 0E Czech 35 23 Israel 15 0F Poland 36 24 Address Function Unit Remarks 680501 Line current detection time 680502 Line current wait time 680503 Line current drop detect time 20 ms Line current detection is disabled. Line current is not detected if 680501 contains FF. 680504 PSTN dial tone frequency upper limit (high byte) 680505 PSTN dial tone frequency upper limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680506 PSTN dial tone frequency lower limit (high byte) 680507 PSTN dial tone frequency lower limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680508 PSTN dial tone detection time 680509 PSTN dial tone reset time (LOW) 68050A PSTN dial tone reset time (HIGH) 68050B PSTN dial tone continuous tone time 68050C PSTN dial tone permissible drop time If 680508 contains FF(H), the machine pauses for the pause time (address 68050D / 68050E). Italy: See Note 2. 68050D PSTN wait interval (LOW) 68050E PSTN wait interval (HIGH) 20 ms - 68050F PSTN ring-back tone detection time 20 ms Detection is disabled if this contains FF. 680510 PSTN ring-back tone off detection time 20 ms - 680511 PSTN detection time for silent period after ring-back tone detected (LOW) 20 ms - 680512 PSTN detection time for silent period after ring-back tone detected (HIGH) 20 ms -
NCU Parameters SM 95 B786 B786 Fax Option Address Function Unit Remarks 680513 PSTN busy tone frequency upper limit (high byte) 680514 PSTN busy tone frequency upper limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680515 PSTN busy tone frequency lower limit (high byte) 680516 PSTN busy tone frequency lower limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680517 PABX dial tone frequency upper limit (high byte) 680518 PABX dial tone frequency upper limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680519 PABX dial tone frequency lower limit (high byte) 68051A PABX dial tone frequency lower limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 68051B PABX dial tone detection time 68051C PABX dial tone reset time (LOW) 68051D PABX dial tone reset time (HIGH) 68051E PABX dial tone continuous tone time 68051F PABX dial tone permissible drop time If 68051B contains FF, the machine pauses for the pause time (680520 / 680521). 680520 PABX wait interval (LOW) 680521 PABX wait interval (HIGH) 20 ms - 680522 PABX ringback tone detection time 20 ms 680523 PABX ringback tone off detection time 20 ms If both addresses contain FF(H), tone detection is disabled. 680524 PABX detection time for silent period after ringback tone detected (LOW) 20 ms 680525 PABX detection time for silent period after ringback tone detected (HIGH) 20 ms If both addresses contain FF(H), tone detection is disabled. 680526 PABX busy tone frequency upper limit (high byte) Hz (BCD) If both addresses contain FF(H), tone
NCU Parameters B786 96 SM Address Function Unit Remarks 680527 PABX busy tone frequency upper limit (low byte) detection is disabled. 680528 PABX busy tone frequency lower limit (high byte) 680529 PABX busy tone frequency lower limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 68052A Busy tone ON time: range 1 68052B Busy tone OFF time: range 1 68052C Busy tone ON time: range 2 68052D Busy tone OFF time: range 2 68052E Busy tone ON time: range 3 20 ms 68052F Busy tone OFF time: range 3 680530 Busy tone ON time: range 4 680531 Busy tone OFF time: range 4 680532 Busy tone continuous tone detection time 20 ms - 680533 Busy tone signal state time tolerance for all ranges, and number of cycles required for detection (a setting of 4 cycles means that ON-OFF-ON or OFF- ON-OFF must be detected twice). Tolerance (±) Bit 1: 0, Bit 0: 0 = 75% Bits 2 and 3 must always be kept at 0. Bit 1: 0, Bit 0: 0 = 50% Bits 2 and 3 must always be kept at 0. Bit 1: 0, Bit 0: 0 = 25% Bit 1: 0, Bit 0: 0 = 12.5% Bits 7, 6, 5, 4 - number of cy cles required for cadence detection 680534 International dial tone frequency upper limit (high byte) 680535 International dial tone frequency upper limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680536 International dial tone frequency lower limit (high byte) 680537 International dial tone frequency lower limit (low byte) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680538 International dial tone detection time 680539 International dial tone reset time (LOW) 20 ms If 680538 contains FF, the machine pauses for the pause time (68053D / 68053E).
NCU Parameters SM 97 B786 B786 Fax Option Address Function Unit Remarks 68053A International dial tone reset time (HIGH) 68053B International dial tone continuous tone time 68053C International dial tone permissible drop time Belgium: See Note 2. 68053D International dial wait interval (LOW) 68053E International dial wait interval (HIGH) - 68053F Country dial tone upper frequency limit (HIGH) 680540 Country dial tone upper frequency limit (LOW) If both addresses contain FF(H), tone detection is disabled. 680541 Country dial tone lower frequency limit (HIGH) 680542 Country dial tone lower frequency limit (LOW) Hz (BCD) If both addresses contain FF(H), tone detection is disabled. 680543 Country dial tone detection time 680544 Country dial tone reset time (LOW) 680545 Country dial tone reset time (HIGH) 20 ms If 680543 contains FF, the machine pauses for the pause time (680548 / 680549). 680546 Country dial t one continuous tone time - - 680547 Country dial tone permissible drop time 680548 Country dial wait interval (LOW) 680549 Country dial wait interval (HIGH) 20 ms - 68054A Time between opening or closing the DO relay and opening the OHDI relay 1 ms See Notes 3, 6 and 8. SP2-103-012 (parameter 11). 68054B Break time for pulse dialing 1 ms See Note 3. SP2-103-013 (parameter 12). 68054C Make time for pulse dialing 1 ms See Note 3. SP2-103-014 (parameter 13).
NCU Parameters B786 98 SM Address Function Unit Remarks 68054D Time between final OHDI relay closure and DO relay opening or closing 1 ms See Notes 3, 6 and 8. SP2-103-015 (parameter 14). This parameter is only valid in Europe. 68054E Minimum pause between dialed digits (pulse dial mode) See Note 3 and 8. SP2- 103-016 (parameter 15). 68054F Time waited when a pause is entered at the operation panel 20 ms SP2-103-017 (parameter 16). See Note 3. 680550 DTMF tone on time SP2-103-018 (parameter 17). 680551 DTMF tone off time 1 ms SP2-103-019 (parameter 18). 680552 Tone attenuation level of DTMF signals while dialing -N x 0.5 – 3.5 dBm SP2-103-020 (parameter 19). See Note 5. 680553 Tone attenuation value difference between high frequency tone and low frequency tone in DTMF signals -dBm x 0.5 SP2-103-021 (parameter 20). The setting must be less than –5dBm, and should not exceed the setting at 680552h above. See Note 5. 680554 PSTN: DTMF tone attenuation level after dialling -N x 0.5 – 3.5 dBm SP2-103-022 (parameter 21). See Note 5. 680555 ISDN: DTMF tone attenuation level after dialling -dBm x 0.5 See Note 5 680556 Not used - Do not change the settings. 680557 Time between 68054Dh (NCU parameter 14) and 68054Eh (NCU parameter 15) 1 ms This parameter takes effect when the country code is set to France. 680558 Not used - Do not change the setting. 680559 Grounding time (ground start mode) 20 ms The Gs relay is closed for this interval. 68055A Break time (flash start mode) 1 ms The OHDI relay is open for this interval.