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Changing the Maximum Transmission Unit

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Setting Up Changing the Maximum Transmission Unit 1W2U-011 In most Ethernet networks, the maximum size of a packet that can be sent is 1500 bytes. A packet refers to a chunk of data into which the original data is divided before being sent. The maximum transmission unit (MTU) may vary on each network. Change the settings of the machine as necessary. For more information, contact your Network Administrator. 1 Select in the Home screen. Home Screen(P. 122) 2 Select . ● If the login screen appears, enter the correct ID and PIN. Logging in to the Machine(P. 133) 3 Select . 4 Select the MTU. 5 Restart the machine. ● Turn OFF the machine, wait for at least 10 seconds, and turn it back ON. LINKS Configuring Ethernet Settings(P. 51) Setting a Wait Time for Connecting to a Network(P. 54) 53

Section	Page
Contents	2
Setting Up	11
Main Functions	12
Preparations Required Before Use	13
Preventing Unauthorized Access	15
Setting Up Using the Setup Guide	17
Setting the Date/Time	19
Setting Up the Network Environment	21
Selecting Wired LAN or Wireless LAN	23
Connecting to a Wired LAN	24
Connecting to a Wireless LAN	25
Setting Up Connection Using WPS Push Button Mode	27
Setting Up Connection Using WPS PIN Code Mode	29
Setting Up Connection by Selecting a Wireless Router	31
Setting Up Connection by Specifying Detailed Settings	34
Checking the SSID and Network Key	37
Setting IP Addresses	38
Setting IPv4 Address	39
Setting IPv6 Addresses	42
Viewing Network Settings	45
Configuring Settings for Communication with a Computer	47
Configuring Printing Protocols and WSD Functions	48
Configuring Printer Ports	51
Setting Up Print Server	55
Configuring the Machine for Your Network Environment	58
Configuring Ethernet Settings	59
Changing the Maximum Transmission Unit	61
Setting a Wait Time for Connecting to a Network	62
Configuring DNS	63
Configuring SMB	67
Configuring WINS	69
Registering LDAP Servers	71
Monitoring and Controlling the Machine with SNMP	76
Other Network Settings	80
Installing Drivers	85
Configuring Initial Settings for Fax Functions	86
Deciding Which Fax Receive Mode to Use	87
Registering the Fax Number and Unit Name	88
Selecting the Receive Mode	89
Connecting the Telephone Line	90
Configuring Scan Settings	91
Preparing to Use the Machine as a Scanner	92
Procedure for Setting to Send E-Mail/Send and Receive I-Fax	93
Configuring Basic E-Mail Settings	94
Configuring E-Mail/I-Fax Communication Settings	97
Procedure for Setting a Shared Folder as a Save Location	101
Setting a Shared Folder as a Save Location	102
Procedure for Setting a FTP Server as a Save Location	105
Basic Operations	108
Parts and Their Functions	111
Front Side	112
Insert a USB Memory Device	114
Back Side	116
Interior	117
Feeder	118
Multi-Purpose Tray	119
Paper Drawer	120
Operation Panel	122
Turning ON the Machine	124
Turning OFF the Machine	125
Powering OFF at a Fixed Time	126
Using the Operation Panel	128
Basic Screens	129
Home Screen	130
<Status Monitor> Screen	133
Message Display	135
Basic Operation	136
Entering Text	139
Logging in to the Machine	141
Placing Originals	143
Loading Paper	147
Loading Paper in the Paper Drawer	149
Loading Paper in the Multi-Purpose Tray	157
Loading Envelopes	162
Loading Preprinted Paper	165
Specifying Paper Size and Type	167
Specifying Paper Size and Type in the Paper Drawer	168
Specifying Paper Size and Type in the Multi-Purpose Tray	170
Registering Default Paper Settings for the Multi-Purpose Tray	172
Registering a Custom Paper Size	174
Limiting the Paper Sizes Displayed	175
Automatically Selecting an Appropriate Paper Source for Each Function	176
Customizing the Display	177
Customizing the Home Screen	178
Registering Frequently Used Settings	181
Changing the Default Settings for Functions	183
Setting Sounds	185
Entering Sleep Mode	187
Registering Destinations	189
Registering Destinations in the Address Book	191
Registering Multiple Destinations as a Group	194
Editing the Registered Destinations in the Address Book	196
Copying	198
Copy Basic Features Screen	200
Basic Copy Operations	202
Canceling Copies	207
Checking the Copying Status and Log	208
Enhancing and Adjusting Copy Quality	210
Selecting the Type of Original for Copying	211
Adjusting Sharpness for Copying (Sharpness)	212
Erasing Dark Borders When Copying (Erase Frame)	213
Adjusting the Color	214
Useful Copy Functions	215
Copying Multiple Documents onto One Sheet (N on 1)	216
Collating Copies by Page	217
Making ID Card Copies	218
Faxing	220
Fax Basic Features Screen	223
Basic Operations for Sending Faxes	224
Canceling Sending Faxes	232
Receiving Faxes	233
Useful Functions When Sending	237
Recalling Previously Used Settings for Sending (Recall Settings)	238
Sending a Fax after a Phone Call (Manual Sending)	241
Saving a Copy of a Sent Original	243
Various Receiving Methods	244
Saving Received Documents into the Machine (Memory Reception)	245
Forwarding the Received Documents Automatically	247
Checking Status and Log for Sent and Received Documents	249
Sending Faxes from Your Computer (PC Fax)	251
Sending PC Faxes	252
Using Internet Fax (I-Fax)	254
Sending I-Faxes	255
Receiving I-Faxes	262
Printing	264
Printing from a Computer	265
Canceling Prints	267
Checking the Printing Status and Log	269
Various Printing Methods	271
Printing a Document Secured by a PIN (Secure Print)	272
Printing via Secure Print	273
Printing from a USB Memory Device (Memory Media Print)	276
Scanning	285
Scan Basic Features Screen	287
Basic Operations for Scanning Originals	290
Scanning and Saving to a Computer	291
Saving Data to a USB Memory Device	293
Sending Data by E-Mail/Saving Data to a Shared Folder or FTP Server	297
Canceling Sending Documents	306
Checking Status and Log for Scanned Originals	307
Scanning Clearly	309
Adjusting Image Quality	310
Adjusting Density	311
Adjusting Sharpness When Scanning (Sharpness)	312
Useful Scanning Functions	314
Enhancing the Security of Electronic Files	315
Adjusting Balance between File Size and Image Quality (Data Size)	318
Recalling Previously Used Settings for Sending/Saving (Recall Settings)	319
Specifying E-Mail Settings	322
Using Your Computer to Scan (Remote Scan)	325
Scanning Documents from an Application	326
Using ScanGear MF	328
Linking with Mobile Devices	330
Connecting with Mobile Devices	331
Connecting via a Wireless LAN Router (LAN Connection)	332
Connecting Directly (Access Point Mode)	334
Utilizing the Machine through Applications	338
Using AirPrint	339
Printing with AirPrint	344
Scanning with AirPrint	347
Faxing with AirPrint	349
If AirPrint Cannot Be Used	351
Using Google Cloud Print	352
Managing the Machine by the Remote Control	354
Managing the Machine	357
Setting Access Privileges	359
Setting the System Manager ID and PIN	360
Setting the Department ID Management	362
Setting a Remote UI PIN	368
LDAP Server Authentication	370
Configuring the Network Security Settings	374
Restricting Communication by Using Firewalls	376
Specifying IP Addresses for Firewall Settings	377
Specifying MAC Addresses for Firewall Settings	380
Changing Port Numbers	383
Setting a Proxy	384
Configuring the Key and Certificate for TLS	386
Generating the Key and Certificate for Network Communication	389
Generating a Key and Certificate Signing Request (CSR)	392
Registering the Key and Certificate for Network Communication	395
Configuring IPSec Settings	397
Configuring IEEE 802.1X Authentication Settings	404
Restricting the Machine's Functions	408
Restricting Access to Address Book and Sending Functions	410
Restricting Use of the Address Book	411
Limiting Available Destinations	413
Restricting the Fax Sending Functions	415
Restricting Printing from a Computer	417
Restricting USB Functions	418
Disabling HTTP Communication	420
Disabling Remote UI	421
Increasing the Security of Documents	422
Generating a Device Signature Key	423
Managing the Machine from a Computer (Remote UI)	424
Starting Remote UI	425
Checking the Status and Logs	428
Setting Up Menu Options from Remote UI	433
Registering Destinations from Remote UI	436
Importing/Exporting the Setting Data	440
Updating the Firmware	443
Initializing Settings	445
Setting Menu List	448
<Preferences>	449
<Display Settings>	450
<English Keyboard Layout>	454
<Timer/Energy Settings>	455
<Network>	459
<External Interface>	473
<Accessibility>	474
<Adjustment/Maintenance>	475
<Adjust Image Quality>	476
<Maintenance>	490
<Function Settings>	492
<Common>	493
<Copy>	498
<Printer>	500
<Send>	544
<Receive/Forward>	555
<Store/Access Files>	561
<Secure Print>	569
<Set Destination>	570
<Management Settings>	571
<User Management>	572
<Device Management>	573
<License/Other>/<Remote UI Settings/Update Firmware>	576
<Data Management>	578
<Security Settings>	580
Maintenance	583
Regular Cleaning	585
Cleaning the Exterior	586
Cleaning the Platen Glass	587
Cleaning the Feeder	588
Cleaning the Fixing Assembly	591
Cleaning the Transfer Belt (ITB)	593
Replacing the Toner Cartridge	594
Checking the Remaining Amount of Consumables	599
Relocating the Machine	600
Adjusting Image Quality	602
Adjusting Gradation	603
Correcting \	608
Adjusting Values for Text Color Reproducibility	609
Adjusting Print Position	611
Viewing the Counter Value	613
Printing Reports and Lists	615
Consumables	620
Troubleshooting	623
Common Problems	625
Installation/Settings Problems	626
Copying/Printing Problems	630
Faxing/Telephone Problems	633
When You Cannot Print Properly	635
Printing Results Are Not Satisfactory	637
Paper Creases or Curls	649
Paper Is Fed Incorrectly	652
A Message or a Number Starting with \	653
Countermeasures for Each Message	654
Countermeasures for Each Error Code	668
Clearing Paper Jams	678
Paper Jams in the Feeder	680
Paper Jams in the Main Unit	682
Paper Jams in a Paper Source	685
When a Problem Cannot Be Solved	690
Appendix	693
Third Party Software	695
Feature Highlights	696
Going Green and Saving Money	697
Improving Efficiency	699
Going Digital	701
So Much More	703
Specifications	705
Main Unit	706
Feeder	710
Available Paper	711
Cassette Feeding Module-AF	715
Copy Card Reader-F	716
Fax Function	717
Scan Function	718
Printer Functions	719
Management Functions	721
System Environment	724
Network Environment	726
Options	727
Optional Equipment	728
System Options	730
Manuals and Their Contents	732
Using User's Guide	733
Screen Layout of User's Guide	734
Viewing User's Guide	737
Basic Windows Operations	738
Menu Route Map	746
Notice	747