Digital Equipment DECmau 900TL Bedienungsanleitung

EK–DTMAU–IN. A01

DECmau 900TL

INSTALLATION

TheDECmau900TLisaTokenRingMultistationAccessUnit(MAU).Asamember

ofDigital’sTokenRingproductfamily,itoperatesinaDEChub900MultiSwitch,ora

single-slothub(DEChubONEMAU900TL).TheMAUconnectsuptoeightstations

using 100-ohm shielded or unshielded cable with RJ45 connectors, and 150-ohm

IBMType1datacableusinganimpedencematchingtransformercable. Itoperates

at 4 or 16 Mb/s and incorporates speed detection. The MAU can also be managed

by optional HUBwatch management software.

PK–02580–IL

DEChub ONE MAU 900TL DECmau 900TL

LKG–8137-93I

FCC NOTICE – Class A Computing Device:

This equipment generates, uses, and may emit radio frequency energy. The equipment has been

typetestedandfoundtocomplywiththelimitsforaClassAcomputingdevicepursuanttoSubpart

J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such radio

frequency interference when operated in a commercial environment. Operation of this equipment

in a residential area may cause interference; in which case, measures taken to correct the

interference are at the user’s expense.

The following are trademarks of Digital Equipment Corporation:

DEC, DEChub, DEChub ONE, DECmau, DECrepeater, Digital, the DIGITAL logo,

HUBwatch, and MultiSwitch.

EK–DTMAU–IN. A01

July, 1993

The information in this document is subject to change without notice and should not be

construed as a commitment by Digital Equipment Corporation. Digital Equipment Corp-

oration assumes no responsibility for any errors that may appear in this document.

Printed in U.S.A.

VCCI NOTICE – Class 1 Computing Device:

This equipment is in the 1st Class category (information equipment to be used in commercial

and/or industrial areas) and conforms to the standards set by the Voluntary Control Council for

Interference by Data Processing Equipment and Electronic Office Machines aimed at preventing

radio interference in commercial and/or industrial areas.

Consequently,whenusedinaresidentialareaorinanadjacentareathereto,radio interferencemay

be caused to radios and TV receivers, etc.

Read the instructions for correct handling.



2 DECmau 900TL

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. In a standalone MAU,

both Ring LEDs are always off.

4 ) Speed LEDs. Either the 16 LED or the 4 LED is on

to show the ring speed.

5 ) Eight Lobe LEDs. Lights when a station has access

to the network.

6 ) Eight Lobe Connectors. Connects a station to the

network.The MAUconnects upto eightstations with

shieldedorunshielded100-ohmcable,and150-ohm

IBMType1datacableusinganimpedencematching

transformer cable (Digital part number BN26T-03).

7 ) Reset Switch. Resets the MAU to factory defaults.

To reset: while turning on the power, press the reset

switch with a pen or screwdriver.

Front Panel

Notes:

The DECmau 900TL has speed detect, which

ensures the integrity of the network. At startup, a

MAU determines the ring speed based on the

speed settings of the majority of the stations on the

ring and the Ring Out port. In a hub, the MAU then

connects to the appropriate ring in the hub. After

startup, speed detect prevents stations with the

wrong speed setting from connecting to the net-

work.

Network management can override any of the

MAU’s factory default settings.

DECmau 900TL 3

LKG-8145-93I

1 2

Note:

TherearpanelshownhereisusedonlywhentheMAU

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) PowerConnector.Providespowerconnectionforthe

MAU.

4 ) Ring In Connector. Connects Ring In to the Ring

Out connector of a MAU or repeater.

5 ) Ring In Autowrap Switch. Determines whether the

MAU automatically loops back when it detects a

disconnected link on Ring In. If the Ring In port

connects to a device with Digital’s Autowrap, set the

switch to 1 to enable Autowrap. If the Ring In port

connects to a device without Digital’s Autowrap, set

the switch to 0 to disable Autowrap.

6 ) Ring Out Connector. Connects Ring Out to the Ring

In connector of a MAU or repeater.

7 ) RingOutAutowrapSwitch.Determineswhetherthe

MAU automatically loops back when it detects a

disconnected link on Ring Out. If the Ring Out port

connects to a device with Digital’s Autowrap, set the

switch to 1 to enable Autowrap. If the Ring Out port

connects to a device without Digital’s Autowrap, set

the switch to 0 to disable Autowrap.

8 ) Not used. Reserved for out-of-band network

management.

Rear Panel of DEChub ONE MAU 900TL

4DECmau 900TL

LKG-8146-93I



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.

WhenyouinstallaMAUinaDEChub900MultiSwitch,youdonothavetoturnoffthehubpower.

Remove the single-slot hub (if necessary).

If you want to install a DEChub ONE MAU 900TL in a hub,

you need to remove the single-slot hub.

Install the MAU in the hub. a. Align the MAU’s 48-pin connector

with any available 48-pin slot on the

hub.

b. Place the MAU’s bottom mounting

tabintothemountingslotonthehub.

c. RocktheMAUintoplace.Youheara

‘‘click” when the MAU is seated.

Installing a MAU in a DEChub 900 MultiSwitch

DECmau 900TL 5

The release lever is

lifted and clicks

back into place

as the module

is seated.

LKG–8139-93I

Mounting

tab

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.

PK–02570–IL

Installing a MAU in a DEChub 900 MultiSwitch (continued)

6DECmau 900TL

Verify power.

With power on in the hub, verify that the

Power and Module OK LEDs are on.

LKG–8141-93I

Module installation for a

DEChub 900 MultiSwitch

is complete.

LKG–8140-93I

a. SettheRingInandtheRingOutAutowrap

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. Otherwise, set the switch to

0 to disable Autowrap.

Mount MAU (optional).

Connect power supply.

3a. Connect the power supply cable to

the power connector.

b. Plug the power supply into a wall

outlet.

SetAutowrapswitches.

You can place the MAU on a table, mount it on a wall, or mount it in a standard 19-inch rack

using a shelf assembly, Digital part number H9544-MS.

Forawallmounting,positiontwoscrews19.7centimeters(7.75inches)apartonthewall.Turn

screws until tight and then back off two turns. Hang the MAU using the keyholes.

Installing a DEChub ONE MAU 900TL

DECmau 900TL 7

LKG–8142-93I

power

supply



If a MAU is being added to an existing

network,connectRingIn totheRing

Outconnectorof aMAUorrepeater,and

connect Ring Out to the Ring In

connector of a MAU or repeater.

Connect station cables.

Check LEDs.

Withpower on,verify thatthe Powerand

Module OK LEDs are on.

Install a MAU to adjacent MAUs or repeaters.

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).

Installing a DEChub ONE MAU 900TL (continued)

8DECmau 900TL

Module installation for a

DEChub ONE MAU 900TL

is complete.

LKG–8143-93I

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.

Remove the MAU from the hub.

Disconnect the station connector cables from the MAU.

The release lever is

lifted and clicks

back into place

as the module

is removed.

LKG–8144-93I

Mounting

tab

LED Summary

LED1Off On Flashing

Power No Power Power OK

Module OK Self-test failed Self-test OK

or not operating

4/16 Mb/s No activity Valid speed or

management set

speed

Lobe Inactive Connected to network Continuous single flash: network

management disabled port.

Continuous double flash: wrong speed.

Hub MAU ONLY:

Ring A/B Not connected Connected to Ring A Continuous single flash: network

or Ring B management disabled port.

A and B alternately flash: MAU needs an

upgrade or an upgrade is in progress.

DEChub ONE ONLY:

Ring In/ Inactive or Connected to network Continuous single flash: network

Ring Out wire fault management disabled port.

Continuous double flash: wrong speed.

1Scroll: During power-up self-tests, all LEDs, except the Power LED, indicate a scrolling

pattern.

The LEDs indicate status by being on, off, and flashing. Flashing LEDs indicate special situations.

Thereare twoflashing patternsanda scrollpattern. When anLED indicatesacontinuoussingle-flash

pattern, network management has disabled the port. A continuous double-flash pattern indicates the

wrong speed. In a scroll pattern, the LEDs turn on and off in a set order.

10 DECmau 900TL

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