Digital Mediaメーカー900TLの使用説明書/サービス説明書
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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.
デバイスDigital Media 900TLの購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Digital Media 900TLをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはDigital Media 900TLの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Digital Media 900TLの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Digital Media 900TLで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Digital Media 900TLを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はDigital Media 900TLの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Digital Media 900TLに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちDigital Media 900TLデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
