Receive (RCV)
When this yellow LED flashes, the TPT-D4 is receiving
data from the network. If attached to a repeater, the
LED flashes when data passes through the TPT-D4.
The flash is pulse-stretched for viewing effect.
Collision (CLN)
When this red LED flashes, the transceiver detected a
collision condition or a jabber packet on the network.
The flash frequency may increase as network activity
increases, since more collisions are likely to occur.
The LED flash is pulse-stretched for viewing effect.
Link OK (LNK)
When this green LED is on, a link exists between the
transceiver and the device at the other end of the
twisted pair segment. LNK remains lit as long as the
link is maintained. Both ports can show a valid link.
Active Port (ACT)
When this yellow LED is on solid, its associated RJ45
port is handling all network traffic through the
transceiver.
Only one port can be active; the inactive port ACT
LED is turned off. A flashing ACT LED indicates that
the associated RJ45 port is the active port and it is in
the Idle state. A slow flash indicates that the time-out
period is set to 10 seconds; a fast flash indicates that
the time-out period is set to 2 seconds.
GETTING HELP
If you need additional support related to the TPT-D4 or
if you have any questions, comments, or suggestions
related to this manual, contact Cabletron Systems
Technical Support:
By Phone:
Monday through Friday 8 A.M. to
8 P.M. Eastern Time at:
(603) 332-9400.
By CompuServe: GO CTRON from any ! prompt
By Internet mail: [email protected]
NOTICE
Cabletron Systems reserves the right to make changes in
specifications and other information contained in this document
without prior notice. The reader should in all cases consult Cabletron
Systems to determine whether any such changes have been made.
The hardware, firmware, or software described in this manual is
subject to change without notice.
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR
ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL
DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO
LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL
OR THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON
SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR SHOULD HAVE
KNOWN, THE POSSIBILITY OF SUCH DAMAGES.
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
Note:
This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of the
FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment uses,
generates, and can radiate radio frequency energy and if not
installed in accordance with the operator’s manual, may cause
harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause interference in
which case the user will be required to correct the interference at
his own expense.
Warning:
Changes or modifications made to this device which are
not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
DOC NOTICE
This digital apparatus does not exceed the Class A limits for radio
noise emissions from digital apparatus set out in the Radio
Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux appareils
numériques de la class A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par le ministère des
Communications du Canada.
VCCI NOTICE
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 Information Technology Equipment (VCCI) aimed
at preventing radio interference in commercial and/or industrial
areas.
Consequently, when used in a residential area or in an adjacent
area thereto, radio interference may be caused to radios and TV
receivers, etc.
Read the instructions for correct handling.
© Copyright May 1995 by:
Cabletron Systems, Inc.
P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9030877-01, May 1995
TPT-D4
is a trademark of Cabletron Systems, Inc.
LANVIEW
is a registered trademark of Cabletron Systems, Inc.
Ethernet
is a trademark of Xerox Corporation.
CompuServe
is a registered trademark of CompuServe, Inc.
TPT-D4
10BASE-T TWISTED PAIR
REDUNDANT TRANSCEIVER
The TPT-D4 twisted pair transceiver links two
Ethernet devices through 10BASE-T twisted pair
and attachment unit interface (AUI) cable segments.
Dual twisted pair ports with RJ45 connectors
provide redundant data paths for critical
applications. If the primary port (port 1) does not
receive any data for either 2 or 10 seconds (switch
selectable), the port enters the Idle state. If the
back-up port (port 2) receives data during the Idle
state, it becomes the active port. When the primary
port senses data again, it switches back to become
the active port. Also, if a segment becomes
disconnected from the primary port, the data path
automatically switches to the back-up port. To avoid
the creation of a data loop, only one port can be
active at any one time. You can connect the two
transceiver ports to the same network device,
different network devices, or even different
networks.
REQUIREMENTS
The TPT-D4 transceiver complies with IEEE 802.3
10BASE-T specifications. For the best network
performance, be sure to observe the following
network guidelines.
SQE
O
MIN MAX
SN
TPT-D4
802.3 10BASE-T
REDUNDANT TRANSCEIVER
with LANVIEW
O
P
W
R
O
S
Q
E
O
X
M
T
O
R
C
V
O
C
L
N
LNK
O
1
2
x
x
==
SP
Primary Port
Back-up Port
ACT
O
LNK
O
ACT
O
AUI Port*
*AUI connector not shown
Primary Port
Back-up Port
