Instruction/ maintenance manual of the product 900TL Digital Media
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EK–DTMAU–IN. A01 DECmau 900TL INST ALLA TION The DECmau 900TL is a T oken Ring Multistation Access Unit (MAU). As a member of Digital’s T oken Ring product family , it operates in a DEChub 900 MultiSwitch, or a single-slot hub (DEChub ONE MAU 900TL).
FCC NOTICE – Class A Computing Device: This equipment generates, uses, and may emit radio frequency energy . The equipment has been type tested and found to comply with the limits for a Class A comp.
PK–02586–IL 1 ) Power LED. Lights when the MAU has power . 2 ) Module OK LED. Lights when the MAU passes its self-test. If the MAU fails its self-test, the OK LED is off. 3 ) Ring A/B LEDs. In a hub, either the A LED or the B LED is on to show the ring.
Note: The rear panel shown here is used only when the MAU is in a single-slot hub configuration. 1 ) Ring In LED. Lights with a Ring In connection. 2 ) Ring Out LED. Lights with a Ring Out connection. 3) Power Connector . Provides power connection for the MAU.
a. Loosen the screw on the single-slot hub until it disengages. b. With one hand holding the front of the MAU, and your other hand holding the single-slot hub, carefully pull the two units apart. When you install a MAU in a DEChub 900 MultiSwitch, you do not have to turn off the hub power .
Connect station cables to any available lobe connector on the MAU. For 150-ohm applications, you also need an impedence matching transformer cable (Digital part number BN26T -03). Connect station cables. 4 PK–02570–IL Installing a MAU in a DEChub 900 MultiSwitch (continued) 6 DECmau 900TL V erify power .
a. Set the Ring In and the Ring Out Autowrap switches to 1 or 0. b. Set the switch to 1 to enable Autowrap when the Ring In or Ring Out port connects to a device with Digital’s Auto wrap, there is only one MAU in the network, or the port is not connected to the network.
If a MAU is being added to an existing network, connect Ring In to the Ring Out connector of a MAU or repeater , and connect Ring Out to the Ring In connector of a MAU or repeater . Connect station cables. 4 Check LEDs. 6 With power on, verify that the Power and Module OK LEDs are on.
Removing a MAU from a DEChub 900 MultiSwitch a. Lift up the Release lever on the hub. b. Pivot the MAU back on its bottom mounting tab until it disengages from the hub. DECmau 900TL 9 Note: When you remove a MAU from the hub, do not turn off the hub power .
LED Summary LED 1 Off On Flashing Power No Power Power OK Module OK Self-test failed Self-test OK or not operating 4/16 Mb/s No activity V alid speed or management set speed Lobe Inactive Connected to network Continuous single flash: network management disabled port.
Cabling T able 1 lists the T oken Ring industry guideline for the maximum lobe length of shielded twisted-pair (STP) and unshielded twisted-pair (UTP) cable. T able 1 Industry Lobe Length Guideline Lobe lengths for Digital’s MAUs exceed the industry guideline.
Cabling (continued) Digital recommends that you use repeaters to segment the ring in a network with multiple wiring closets. In some situations, only one, or no repeaters, are required. Refer to the appropriate T oken Ring repeater manual for specific information.
Problem Solving If ... Then ... Do This ... DEChub 900 MultiSwitch and DEChub ONE Power LED is off. MAU does not have power . V erify that outlet has power . Check power connection to MAU. Replace power supply . Replace MAU. Module OK LED is off. MAU failed self-test.
Problem Solving (continued) If ... Then ... Do This ... DEChub 900 MultiSwitch ONL Y Lobe, Ring In, Ring Out, Network management has T o change settings, you can use Ring A/B LEDs flash together . disabled MAU. network management commands or the MAU’s Reset switch.
Product Specifications Product Specification In a Hub DEChub ONE Size 27.3 x 1 1.2 x 3.2 cm 27.3 x 17.0 x 3.2 cm (10.8 x 4.4 x 1.2 inches) (10.75 x 6.7 x 1.
An important point after buying a device Digital Media 900TL (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Digital Media 900TL yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Digital Media 900TL - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Digital Media 900TL you will learn all the available features of the product, as well as information on its operation. The information that you get Digital Media 900TL will certainly help you make a decision on the purchase.
If you already are a holder of Digital Media 900TL, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Digital Media 900TL.
However, one of the most important roles played by the user manual is to help in solving problems with Digital Media 900TL. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Digital Media 900TL along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
