Be prepared to see two types of networking software, however: Apple's newer Open Transport and the so-called "Classic Networking." Open Transport uses the AppleTalk and TCP/IP control panels; Classic Networking uses the Network and MacTCP control panels.

On all Macintosh computers, AppleTalk is the protocol that allows users--among other things--to see and be on AppleTalk zones, share files and other resources with other Macintoshes over the network, and access FAS Computer Services software from Appleshare servers.

Classic Networking Macs handle AppleTalk in the Network Control Panel; the new Open Transport system has its own AppleTalk Control Panel instead. Mac users can access TCP/IP -- the protocol used for Internet applications such as telnet and ftp -- either through the MacTCP setup for Classic Networking or the TCP/IP Control Panel for Open Transport. All Mac Internet applications require TCP/IP connectivity to work properly. TCP/IP theory is covered in the Basics of Networking chapter.

Table of Contents:

Section I: The Ethernet Device

1. Finding the Ethernet Address
2. Built-in Ethernet With Transceiver
3. Built-in Ethernet 10Base-T Jack
4. NuBus Ethernet Cards
5. 68030 PDS Ethernet Cards
6. LC and Performa PDS Ethernet Cards
7. External Ethernet Adapters
8. Installing PCMCIA Ethernet Cards for Macs

Section II: Device Drivers

1. Installing Drivers for Farallon Devices
2. Installing Drivers for Asante Devices

Section III: AppleTalk and EtherTalk

1. AppleTalk/EtherTalk, AppleShare, and Zones
2. Verifying AppleTalk Connectivity
3. Using AppleShare to Install Network Software

Section IV: TCP/IP on the Macintosh

1. MacTCP for Classic Networking
2. TCP/IP for Open Transport
3. Verifying TCP/IP Connectivity

Section V: Miscellaneous Troubleshooting

1. A Standard Checklist for Macintosh Networking
2. Common Macintosh Networking Problems and Solutions
3. Other Notes

Section I: The Ethernet Device

There are six main types of Macintosh Ethernet devices: built-in Ethernet requiring transceiver, built-in Ethernet 10Base-T jack, NuBus Ethernet cards, PDS Ethernet cards, external adapters, and PCMCIA Ethernet cards. NuBus and PDS Ethernet cards are reminiscent of PC expansion cards and are internal devices that plug into expansion "slots" inside the Mac. The procedures for each are listed below, along with the types of Macs that use each particular method of Ethernet.


WARNING: The adapter boards will be installed in computers which operate with voltages that can be lethal. Before removing the cover to a computer, observe the following steps to protect yourself and prevent damage to the system's components.

1. Turn off the computer and unplug the unit from its power source.
2. Disconnect all cables that are connected to the main system unit.
3. Remove any loose jewelry from your hands and wrists.
4. Use only insulated or nonconductive tools.
5. Put on your wrist ground strap (required!).

There are two ways of getting the addresses from Macintosh Ethernet devices. One way is directly copying the information off the Ethernet device. External adapters and some Ethernet Nubus cards have the information imprinted on them or in the included manual. Built-in Ethernet devices however, do not. Macintosh Centrises, Quadras, PowerBook 500 series and PowerMacs all have built-in Ethernet capability. The way to determine the Ethernet address of these machines is to use a software utility.


One of the best methods is to use the Apple LAN Utility program located on our installer disks. Run the program, and if it finds the Ethernet device, it will report its Ethernet address to you.


For machines running Classic Networking, go to the MacTCP Control Panel, hold down the Option key, and click on the Ethernet icon. The Ethernet address will pop up. For machines running Open Transport, go to the TCP/IP Control Panel, go to "Get Info" under the File menu, and it will display "Hardware Address". This is the Ethernet address.


A note: For the most part, users who are running System 7.5 will want to upgrade to System 7.5.3, which is much more stable. However, on PCI-based PowerMacs (7200/7500/7600/8500/9500), updating to System 7.5.3 will correct "faulty" Ethernet addresses, thus partitioning users on the FAS Network. If you come across a machine that was working on the network and then stopped, ask the user if they have upgraded to 7.5.3. If so, double-check the Ethernet address, run Netconnect and 'modify connection' with the correct Ethernet address.

Macintoshes with built-in Ethernet include:
• Centris 610/650/660AV
• Quadra 605/610/650/700/800/840AV/900/950
• PowerMac 6100/7100/8100,
• Duo Dock II
• Powerbook 520/520c/540/540c.
These machines all have AAUI ports on the back - trapezoidal ports to which a transceiver attaches. The transceiver has a 10Base-T jack and usually has some diagnostic lights. The supported transceivers are the Farallon Ether10-T Transceiver (PN502), Apple Ethernet Twisted Pair Transceiver, and the Asante FriendlyNet Adapter (FN10TA).


Installation Procedure


1. Turn off the machine and disconnect the power source.
2. Attach the transceiver to the AAUI port on back of the machine.
3. Attach 10BaseT cable into wall data jack.
   For Asante transceivers: be sure the end labeled "TO COMPUTER" goes to the computer and "TO NETWORK" goes to the 10BaseT cord going to the wall jack. Also make sure the cable "TO COMPUTER" is in tight in the adapter until it "clicks".
4. Plug the machine back into the power source and boot it.
5. Verify that the "link" indicator light is lit.
6. Please note: There is no need to install the Ethernet drivers as the preinstalled Macintosh drivers will work.

Some new Power Macintosh computers come with 10Base-T jacks built into them. This eliminates the need for a transceiver, and you shouldn't have to provide much - or any - hardware support for these systems. Simply power the machines down, attach the 10Base-T Ethernet cable, and proceed with the installation.

Many older Macintoshes use the NuBus cards, including:
• Macintosh II, IIx, IIcx, IIci, IIvx, IIvi, Iifx
• Powerbook DuoDock
• Performa 600
The supported NuBus cards for these machines are the Farallon EtherMac II-10T (PN590a-TP), the Asante AsanteLite (NB-10T), and the Asante (MC+IIET64).


Installation Procedure

1. Disconnect power source.
2. Remove cover of computer (keep track of all screws!).
3. Attach the alligator clip of the grounding strap to the chassis of the Mac.
4. Locate an available NuBus slot.
5. Remove the Ethernet card out of its antistatic bag. Remember to handle the card only by its edges.
6. Insert the Ethernet card into the NuBus slot until you feel it is firmly in place.
7. Put the cover back on the machine.
8. Make sure to put all the screws back in place.
9. Plug the power cord back in.
10. Connect the computer to the data jack on the wall with 10Base-T.

Only very old Macs use these cards, including:
• Macintosh Iisi
• Macintosh SE/30
• Macintosh SE
The supported cards are the Farallon EtherMac 30i-10T (PN594-TP) and the Asante (MC+30IET64). Please note: if a user with an SE requests assistance, please refer them immediately to the Advanced Support Team!


Installation Procedure

The EtherMac card for these Macs come with an additional connector card. The connector card is the smaller of the two cards in the box and has a metal bracket with network cabling connectors. The EtherMac card inserts into the Macintosh motherboard slot and the connector card attaches to the computer case. A flat ribbon cable connects the two cards.

1. Disconnect power source.
2. Remove cover of computer (keep track of all screws!).
3. Put on your wrist strap to discharge static electricity build-up.

To insert the EtherMac card:

1. Remove the EtherMac card-the larger of the two cards-from its antistatic bag. Hold the card by its edges to avoid damaging the card with static electricity. Do not hold the card by the components and do not touch the connectors on the bottom of the card.
2. Locate the 16-conductor ribbon cable included with the card. Plug one end of the ribbon cable connector into the matching 16-pin connector on the EtherMac card. The cable connector only fits one way. Make sure there are no kinks in the cable.
3. The expansion slot is located at the far left of the computer as you face the front of the Macintosh. Position the card over the expansion slot with the component side facing toward the power supply.
4. Gently insert the card into the slot connector until it is firmly seated. If you encounter any resistance, pull the card out and try again. Do not wiggle the card from side to side as you insert it.

To insert the connector card:

1. Locate the access port cover on the rear panel of the Macintosh. Push the cover outward. Store the cover or tape it inside the Macintosh for later use if desired.
2. Remember to put on your wrist strap!
3. Connect the free end of the ribbon cable to the matching 16-pin connector on the connector card. The cable connector only fits one way. Be sure there are no kinks in the cable.
4. Turn the connector card so that the network cabling connectors are facing out the back of the Macintosh.
5. Facing the back of the Macintosh, position the card on the inside surface of the Macintosh rear panel. Align the left mounting hole of the access port with the left mounting hole on the connector card.
6. Insert a screw from outside the rear panel through these holes. Then insert the other screw and tighten both screws.
7. Put the cover back on the machine.
8. Make sure to put all the screws back in place.
9. Plug the power cord back in.
10. Connect the computer to the data jack on the wall with 10Base-T cable.

A wide variety of Macs use this card, including:
• Macintosh LC I/II/III/475/520/575
• Color Classic
• Centris 610/660AV
• models of the Quadra 610 that lack built-in Ethernet
• Performa 400/405/410/430/450/460/466/467/470/475/476
  Performa 550/575/577/578/630/636
  
The supported cards are the Farallon EtherMac LC-TP (PN592a-TP), the Asante AsanteLite (LC-10T), and the Asante (MCLC10TIII). Because of the wide variety of popular machines that use PDS cards, expect to see many of these during in-room assistances.

Installation Procedure:

1. Disconnect power source.
2. Remove cover of computer (keep track of all screws!)
3. Attach the alligator clip of the grounding strap to the chassis of the Mac.
4. Locate an available PDS.
5. Remove the Ethernet card out of its protective sleeve. Remember to handle the card only by its edges.
6. Insert the Ethernet card into the slot.
7. Put the cover back on the machine.
8. Make sure to put all the screws back in place.
9. Plug the power cord back in.
10. Connect the computer to the data jack on the wall with 10BaseT cable.

Older Powerbooks and desktops require these external adapters, including:
• Macintosh Powerbook 100/140/145/145b/150/160/165/165c/170/180/180c
• Mac Plus
• Mac Classic/Classic II
• Performa 200
• Powerbook Mini Dock
The preferred device is the Farallon Ether Mac/PB Adapter (PN550C-ADB). Other supported devices are the Farallon EtherMac MicroSCSI (PN574-C for Powerbook, PN575-C for other Macs) and the Asante (Mini EN/SC10T)


Installation Procedure

1. Turn off your Macintosh and all devices. Make sure the Powerbook is not in the "sleep" mode.
2. For the EtherMac/PB Adapter, plug the data cable into the printer port. For the MicroSCSI usit, Connect the DB25 connector of the SCSI cable to the MicroSCSI where it is marked "SCSI PORT". Plug the other end of the SCSI cable into the SCSI port on the back of your Macintosh.
3. Now connect the power source to the adapter. For Farallon adapters: Plug the ADB adapter cable into the ADB port on the back of your Macintosh. If you do not have any free ADB ports, you can use the one going to your mouse or keyboard. If you need to use the mouse or keyboard ADB port, simply reattach the mouse or keyboard cord to the remaining end to the ADB adapter cable. For Asante adapters: Connect the power adapter to a wall outlet and the other end to the EN/SC card. Connect the SCSI Ethernet adapter to the network via 10Base-T twisted pair cable.
4. For Farallon adapters: If there is a switch on the unit, make sure that the switch position, labeled "<-SW->" on the microSCSI, is moved towards "TP" - Twisted Pair. For Asante adapters: Make sure the link integrity switch in set to "on" and "SCSI termination" switch is set to on if the EN/SC is the last device on a SCSI chain.
5. Turn on your Macintosh.
6. Check that the power LED on the SCSI card is on.
7. Check that the "link" indicator light is lit.

PCMCIA cards are marvels of miniaturization; they are close to a credit card in size yet rival the speed and reliability of full desktop Ethernet cards. There are three types of PCMCIA slots, in order of development: Type I, Type II, and Type III. All are essentially similar, except each newer slot provides a little more functionality than its predecessor, and newer card types are also thicker specifications. Most new notebooks come with one Type III PCMCIA slot, which can also hold two Type II PCMCIA cards. The Farallon EtherMac 10BaseT Ethernet card is Type II, and is based on the 3Com EtherLink III device.
1. As a reminder, turn off the computer and unplug the unit from its power source before proceeding.
   
2. Grasp the Farallon EtherMac card by the edges. Hold the card so that the 68-pin connector is facing toward the adapter slot of the computer.
   
3. Insert the adapter into the adapter slot in the computer and slide it in until firmly seated. You should feel a bit of resistance after sliding it in 3/4 of the way--keep pushing until you hear a muffled click.
   
4. Plug in the proprietary PCMCIA Ethernet adapter cable into the card and the other end of the cable into the wall datajack. Use the 10Base-T (RJ45) coupler provided with the card if you need to attach the adapter cable to a longer, standard Ethernet cable in order to reach the wall datajack.
   
5. Turn on the Powerbook and run the installation software provided by Farallon.
   

Section II: Device Drivers

For many Macs, the device driver software that allows the computer to recognize the Ethernet device is built-in to the system or unnecessary. Macintoshes with built-in Ethernet support have the driver software built into the system. You generally shouldn't have a problem with drivers on these machines; if you do (since users are pretty good at trashing important files), try reinstalling the appropriate networking components from the user's system disks or CD-ROM.


Any machine that needs a card installed internally, or Macs that have external SCSI adapters, require device drivers to be installed from diskettes. These diskettes are included with the devices; alternatively, we also have some versions available at our Web page.


Both the Asante and the Farallon disks install important extensions in the Extensions folder of the Macintosh System Folder. For desktop machines, it is the EtherTalk or EtherTalk Phase 2 extension; for the SCSI adapters, it is the Powerbook Adapter (or PB Adapter). Macs with built-in Ethernet have a "Built-In EtherTalk" icon in their Network Control Panel. These show up as icons in the Network Control Panel. It is this extension that enables the card and allows it to communicate with the computer - make sure it's there!

After installing a Farallon Ethernet card or adapter, follow these procedures:
1. Power on machine with extensions off (hold down the shift key while restarting).
2. Insert the driver disk that came with the user's Ethernet card, or create an image of this diskette from our Web page.
3. Launch the Farallon installer.
4. Choose "Install".
5. Restart.

The Farallon diskette also includes some handy utilities for diagnosing common card problems.

Asante EtherTalk Installer V5.2.3 or later is required for all Asante Ethernet cards. AsanteLite EtherTalk Installer V1.1 or later required for all Asante AsanteLite Ethernet cards (Asante EtherTalk Installer V5.2.3 will also support Asante AsanteLite Ethernet cards). Asante EtherTalk Installer V5.2.8 or later is required for use with the Asante (MC+SEET) card for Macintosh SE systems. Asante EtherTalk Installer software ships with Asante cards; however it may ship with older versions.
1. Restart with extensions off (hold down the shift key while restarting).
2. Insert the Asante Driver disk 5.3 or higher.
3. Double click the Asante installer option.
4. Choose "easy install".
5. Restart.

And like the Farallon devices, Asante includes utilities on their disks for diagnosing and testing their Ethernet devices. Remember, though: don't run these tests with the computer plugged into the datajack, as this might cause a partition!


---

Section III: AppleTalk and EtherTalk

Section III.1: AppleTalk/EtherTalk, AppleShare, and Zones

AppleTalk is the name of a popular yet proprietary protocol designed by Apple for use on their Macintosh computers. The AppleTalk protocol is enabled in the Chooser, under the Apple Menu; if AppleTalk is inactive on a Mac, the user will see no zones in the Chooser.


AppleTalk was originally designed to be used on Apple's own proprietary network cabling and devices, under the name of LocalTalk, using cords similar to their printer cables! With the popularity of Ethernet technology, however, EtherTalk was developed, which allows AppleTalk to operate over Ethernet cabling like that of the FAS Network. EtherTalk packets sent out from computers on the FAS Network are blocked from reaching the Internet by the Science Center gateway.


On machines running Classic Networking, there is a Network Control Panel. It will almost always have LocalTalk, along with one of several other selections: usually, EtherTalk, EtherTalk Phase 2, Built-In EtherTalk, or Powerbook Adapter. Do not select the LocalTalk option for the FAS Network! Instead, be sure to select the EtherTalk or similar option for Ethernet functionality. However, in the MacTCP control panel, there is the option of having either Ethernet or Ethertalk selected. On this control, Ethernet must be selected, not Ethertalk. It's slightly confusing at first, and a common cause of problems. Make sure it's EtherTalk in the Network Control Panel and Ethernet in the MacTCP Control Panel.


Macs using Apple's new Open Transport system will find the Network Control Panel gone and replaced with an AppleTalk Control Panel. It functions in much the same fashion. Make sure the user has set the network type to Ethernet and not modem or printer port; this is one of the most common causes of Open Transport problems.


AppleShare is the name for Apple's system of transferring and copying files via AppleTalk/EtherTalk over a network. It would be too inconvenient to have all the machines on a huge network like Harvard's pop up into one window, however, so AppleShare organizes networked Macs into "zones." On the FAS Network, they are divided up geographically. Within a dormitory, you will often see "Student Net (Thayer)," or "Student Net (Leverett House)," etc. Another important zone is "FAS Computer Services;" networked machines on this zone have important software available.

To verify that AppleTalk/EtherTalk is working, simply open the Chooser and look to see if there are any zones shown! All available zones will show up in the lower left hand corner of the Chooser window. In addition, you will see zones listed on the Network Control Panel or the AppleTalk Control Panel.


If there are no zones listed, AppleTalk might not be turned on at all; check this in the Chooser. If AppleTalk is activated and things still aren't working right, the EtherTalk or Ethernet settings are probably at fault; check the Network or AppleTalk Control Panel.

For the user's convenience, the standard Network applications (such as Fetch, Netscape, Telnet, etc.) can be installed over AppleShare. The Installer diskette contains an alias to our software installer volume on the network; double-clicking on it will mount the volume and launch the installation program. (Note, of course, that if the user's network connection is not working, the software volume won't be able to be mounted from the network, and an error message about not being able to find the install program will be displayed.) If you don't have a diskette with you, you can install the software via the FAS Network:
1. Go into the Apple menu and select the Chooser.
2. Click on Appleshare.
3. In the Appletalk Zones choose the "FAS Computer Services" zone.
4. Select Get_Connected as the file server.
5. Click on Guest and then on OK.
6. Choose Installer.
7. An icon will appear on the right side of the desktop screen entitled Installer. Double-click on this installer icon.
8. A window with several items inside will appear. Select the Installer program icon.

While the AppleTalk/EtherTalk protocol handles many of the networking applications on a Macintosh, it was originally designed just for use on Macs. In order to communicate with the Internet, Unix boxes, and many other systems, variations of the industry-standard TCP/IP must be installed. On older Macintoshes, MacTCP handles TCP/IP issues; newer machines have the protocol built in to Open Transport.

On older Macs, the MacTCP Control Panel and its related files handle and control TCP/IP packets coming into and going out of the system.


As mentioned earlier, be sure that Ethernet, and not EtherTalk, is selected in the MacTCP Control Panel! This is the opposite setting from the Network Control Panel, and is a common source of frustration for users and UAs alike.


Dynamic assignment of IP addresses on the Macintosh is controlled through MacTCP. Clicking on the Options button in the Control Panel will bring up a dazzling array of options. Don't play with them. If everything is working correctly, you will see that the system is set to get an IP address from the server, and this is how it should be - this lets Bootp do its job.

Newer Macs and those running System 7.5.3 have switched to Apple's Open Transport system. The MacTCP Control Panel has been replaced by a TCP/IP Control Panel.


Our Installer should set most of these settings itself. Make sure that the AppleTalk Control Panel is set to Ethernet and not printer or modem port. Make sure that the TCP/IP Control Panel is set to Ethernet, not AppleTalk(MacIP), and that it is getting its IP address via Bootp from the Harvard server. All other options should be grayed out.

Launch NCSA Telnet from the Apple Menu and try to connect to fas. Verify that you get a login prompt; this tells you that TCP/IP is working fine.


You should also try running Netscape, since it is the most demanding network application for the Macintosh. If this works, everything else probably will as well.


On a Classic Networking Mac, if you are seeing zones but having problems with Internet applications, be sure to check the MacTCP Control Panel for any errors. If problems persist, look for a MacTCP Prep preferences file in the System Folder, trash it, and restart the machine - this will often solve the problem. Doing this causes MacTCP to rebuild the preferences file, usually with the correct settings.

Section V: Miscellaneous Troubleshooting

This section contains both a checklist for common problems as well as a Question & Answer section. Unfortunately, not every problem can be included so only selected "common problems" and the corresponding solutions will be listed.

If something doesn't work properly, this is the standard array of steps you should follow. Often a problem occurs because one of these simple things is overlooked:

1. Check to see if the link light on the Ethernet device is on and/or if the receive/trasmit lights are flashing. NOTE: the link, receive, and transmit lights may not be on every Mac Ethernet device. If you don't see any link light and are sure the cable is good, it may indicate a loose card or bad datajack or patch. If you see link but no receive activity, especially with transmit attempts at regular brief intervals, it may indicate some problem with the jack or patch.
2. Check all 10Base-T connections, including card/cable and cable/wall. As part of this, make sure the cable is plugged into the data portion of the jack and not the voice portion. This step is especially important if there is no link light on the Ethernet device.
3. If the Ethernet device is a card, are you sure you seated it properly in its slot? Double-check if at all possible. If the Ethernet device is a transceiver or is SCSI, make sure the connection between the between the computer and the device is solid.
4. Swap the user's Ethernet cable with yours. This step is especially important if there is no link light on the Ethernet device. If this works, make sure the user's cable is not phone cabling, but 10Base-T unshielded twisted-pair Ethernet cabling, before declaring the user's cable defective. Under no circumstances should you let the user keep your cable; make them buy their own.
5. "Rat-Hair Check:" physically blow hard into the datajack (seriously) in order to clear any dust or debris that may have collected there. You may want to also blow into the RJ-45 connector (where the 10Base-T Ethernet cable connects) on the Ethernet device just in case.
6. Make sure the number of the jack that the user is plugging into is also the number that is specified on the user's task report. Get the Ethernet address of the user's Ethernet device using the steps in Part 2, Section 4 and make sure your results match up with the Ethernet address that is on the task report.
7. If you get absolutely no link indication and have tried different cables, try plugging into the Voice part of the jack. There are a few rare occasions where the datajacks were installed with the jacks reversed. If this is indeed the case, make sure to let the user and Advanced Support know about it.

Before ever calling Advanced Support, you should complete all the steps in this checklist and be ready to report all the results from the steps.

Problem: Can't see AppleTalk zones in the chooser

• Make sure Appletalk is active in the chooser.
• Check the network Control Panel and see if Ethertalk is selected.

You get a message like this:

	An error occurred while trying to load EtherTalk; your connection
	will be switched to LocalTalk.

The only reason EtherTalk will fail to load is if the computer is not connected to an Ethernet network.


• Make sure the Ethernet cable is firmly plugged into the datajack (not voice jack!) and into the computer.
• Make sure the user's jack was activated before they plugged in their Ethernet cable. If not, the jack is probably partitioned. Unplug it and wait a few minutes, then plug it in and restart.
• If the user is plugged into a split jack, try the other computer. If neither one works, try replacing it with another splitter.

You get a message like this:

	The connection to fas could not be opened, because the domain
	name is invalid.  

• Go to the Get Connected Installer and re-install the Preferences. (you shouldn't need to re-install anything else). Restart.

You get a message like this:

	An error occurred while attempting to open the MacTCP driver. 
	Internal error #300 MacOS error #-xxxxx.

• Check to make sure that the Ethernet cable is securely plugged into the datajack (not the voice jack!) and the back of the computer.

• Check to see if AppleTalk zones in the Chooser are still available. If the zones are still available, chances are MacTCP has been corrupted. Deleting the MacTCP DNR file in the System Folder and then rebooting is one option. If network connectivity has still not been reestablished, delete the MacTCP control panel, MacTCP DNR and MacTCP Prep preferences file and then reinstall MacTCP via the Installer disk or network (once zones are reestablished).
  

You try to open a connection to scunix4 and get the message:

	scunix4: host or gateway not responding

• Scunix4 is temporarily 'down', try connecting to another machine. If you get similar messages, it means that there are larger network problems. :)

Computer randomly crashes while on the network.

• Make sure 32-bit addressing is on in the Memory Control Panel.

Error opening preferences file when running NCSA Telnet.

• Go into the Preferences Folder within the System Folder and trash the NCSA Telnet preferences file.

The user switched from a faulty Asante Ethernet device to a Farallon model and still can't connect properly to the network.

• Make sure the Asante device drivers totally removed from the system. These files are hidden when installed so they become invisible to the user. The same Asante Installer disk that was used to originally install the device drivers must be used to "uninstall" these files. Note that installing a different company's device driver will not overwrite any existing ones.
  

The user bought an external Ethernet adapter that requires the use of an ADB port for power but the Mac he or she has doesn't have one.

• Currently, there is only one Macintosh model that doesn't have an ADB port and that is the PowerBook 150. Users that have purchased a Farallon Ethernet SCSI device can contact Advanced Support for information on obtaining an external power supply.
  

Powerbooks that use external Ethernet adapters powered by an ADB port must be configured so the notebook does not go to sleep. If these Powerbook go into sleep mode while on the network, the datajack may likely become partitioned.


Certain Performa models (i.e. model 475) have a special extension called ProDos that allows the Mac to read and write to Apple II computers. This extension causes problems when connecting to the network. Trashing the ProDos extension will most likely clear up the problems.


In the General Controls control panel make sure that Folder Protections are off (deselected) for the System folder and Applications folder. Note that in some Performa models (i.e. model 476), the System and Applications folder protection option is located in the Performa control panel instead of the General Controls panel.


Some older Farallon and Asante Transceivers have a AAUI connector that is incompatible with 500-series Powerbook models (520, 520c, 540, and 540c). Tranceivers manufactured by Farallon since January 1994 and Asante since June 1994 will work with these newer systems. Also, some Asante NuBus and LC cards demonstrate intermittent connectivity problems and require an engineering change in order to properly function on the network. If you run into such a card, please contact the Advanced Support Team for more information on whether your user's card requires this correction and how to obtain it.