Digital Equipment DECmau 900TL Manuale utente
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.
Copyright 1993 by Digital Equipment Corporation
All Rights Reserved.
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.
Copyright
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
6
4
3
5
1 2
7
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
2
1
3
4
5
6
7
8
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.
1
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
2
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.
4
PK–02570–IL
Installing a MAU in a DEChub 900 MultiSwitch (continued)
6DECmau 900TL
Verify power.
3
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).
1
Connect power supply.
3a. Connect the power supply cable to
the power connector.
b. Plug the power supply into a wall
outlet.
SetAutowrapswitches.
2
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
To
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.
4
Check LEDs.
6
Withpower on,verify thatthe Powerand
Module OK LEDs are on.
Install a MAU to adjacent MAUs or repeaters.
5
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.
1
2
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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