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1. INTRODUCTION

This guide is intended for the system or network administrator
responsible for installing and monitoring a Transition Networks’ pocket
switch. A working knowledge of local area network (LAN) operations,
including familiarity with communications protocols used on
interconnected LANs, is assumed.

Transition Networks’ Pocket Switches

Transition Networks’ pocket switches (E-PSW-TX-02 and E-PSW-FX-02)
provide a smooth network migration from legacy Ethernet™ 10BASE-T
to Fast Ethernet 100BASE-TX or 100BASE-FX, supporting increasing
network demands through incremental upgrades to existing network
investments. 

Features

Supports a full Ethernet segment on each port

Adheres to current and emerging IEEE802.3 and IEEE802.3u
Ethernet standards

Provides two ports with selectable 10BASE-T or 100BASE-TX

E-PSW-FX-02 provides one port with selectable 100BASE-FX

Supports full- or half-duplex operation on both ports

Provides selectable auto-negotiation for detecting and adapting
to line speed/operation mode of attached device on each port

Provides wire-speed switching for same-speed transfers

Provides packet buffers for high performance

Supports self-learning of MAC addresses 

Transition Networks’

Pocket Switch

26

1

Fiber

OR

UTP

UTP

The sole purpose of this remedy shall be provided the customer with the replacement or
repair of non-conforming goods in the manner described in this Warranty statement. This
exclusive remedy shall not be deemed to have failed of its essential purpose so long as TN is
willing and able to repair or replace the defective item(s) or refund the purchase price. 

TN reserves the right to inspect products claimed to be defective under warranty either at the
customer’s location or at TN’s plant. TN assumes no liability for liability charges incidental
to the adjustment, service, repairing, removal or replacement of the product, or other costs,
or the expense of repairs made outside of its factory, except when made with TN’s prior
written consent. Additionally, Transition Networks reserves the right to charge for all testing
and shipping incurred, if after testing, a return is classified as “No Problem Found”.

TN’s total liability in connection with the products and their installation to all persons and
from all causes in the aggregate, whether in contract, tort, or strict liability, shall not exceed
the amount paid to TN for the product directly related to the alleged damage. However, in
no event shall TN have any liability to a customer or any third party for products
manufactures according to the customer’s specifications.

C. Return Procedure
The customer must follow this procedure for the return of defective items:

1. Locate the serial number(s) of the item(s) to be returned.
2. Determine the date the item(s) was received.
3. Contact Transition Networks Technical Support to determine if the problem can be

corrected on site.

If not, and the product is covered by warranty, then:

• Call the distributor directly or contact TN.
• Request a Return Material Authorization (RMA).
• Ship the item, prepaid in original packaging to Transition Networks at the above

address.

• Include the RMA number on the outside of the carton and/or on the Packing List.
• Include a copy of the RMA form.
• Include a copy of the original invoice or packing list (if possible) to expedite

processing.

• The item(s) may be shipped by the customer or the distributor.
• Transition Networks will repair or replace the unit, at TN’s discretion, and cover the

cost of the return freight to the distributor or to the customer, whichever requested
the RMA number.

If the item(s) was received more than five years ago, or if the item(s) is no longer covered by
warranty 
for other reasons, then:

• Call the distributor or contact TN.
• Request a Material Repair Authorization number (MRA).
• Ship the item(s), prepaid, in the original packaging to Transition Networks at the

above address.

• Include the MRA number on the outside of the carton add/or on the Packing List.
• Include a copy of the MRA form.
• Include a copy of the original invoice or packing list (if possible) to expedite processing.
• Only the customer (end-user) may send the items(s) to TN.
• TN will contact the customer after the item(s) have been received, inspected, and a

cost estimate of the repair determined.

• The repair charges may be billed, with customer’s approval, though the distributor, or

on a prepaid or C.O.D. basis directly to the customer. The charges will include the
cost of shipping.

The return authorization numbers are valid only for 90 days from the date issued.

Summary of Contents for E-PSW-FX-02

Page 1: ...s 50 hertz Europe 3340 120 volts 60 hertz USA Canada Mexico 3346 100 volts 50 60 hertz Japan 3511 240 volts 50 hertz Australia 3537 with power cord 3522 South Africa Environment Temperature 0 50 C 32 to 122 F Humidity 10 90 non condensing Altitude 0 10 000 feet Warranty Lifetime Transition Networks 29 For assistance in installing using or maintaining the TRANSITION Networks Pocket Switch contact T...

Page 2: ...uipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at the user s own expense Canadian Regulations This d...

Page 3: ...igured as straight through 10BASE T 100BASE TX cable for like devices such as hub to hub or terminal device to terminal device must be configured as crossover Transition Networks Pocket Switch Table of Contents 1 INTRODUCTION 1 Transition Networks Pocket Switches 1 Features 1 The Evolving Ethernet Network 2 Increasing Bandwidth by Segmenting 10BASE T Collision Domain 11 Doubling Bandwidth by Insta...

Page 4: ...TN s total liability in connection with the products and their installation to all persons and from all causes in the aggregate whether in contract tort or strict liability shall not exceed the amount paid to TN for the product directly related to the alleged damage However in no event shall TN have any liability to a customer or any third party for products manufactures according to the customer ...

Page 5: ...ND EXTENDS ONLY TO PRODUCTS ASSEMBLED BY TRANSITION NETWORKS INC TO THE EXTENT PERMITTED BY LAW TN DOES NOT MAKE AND DISCLAIMS ALL OTHER WARRANTIES EXCEPT TITLE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF DESCRIPTION MERCHANTIBILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT AND ANY WARRANTY BASED UPON PRIOR WRITTEN OR ORAL REPRESENTATIONS REGARDING SUCH PRODUCTS MA...

Page 6: ... systems and MIS expertise Pocket Switch Operation The Transition Networks pocket switch is an Ethernet network device integrated into the legacy Ethernet network that adapts selectively to the Fast Ethernet network by examining all incoming data packet frames for the destination address and quickly determining the appropriate output port and mode half duplex or full duplex for the packet 5 MAINTE...

Page 7: ...b s RJ 45 twisted pair connector LED Indicators POWER Steady green LED indicates connection to external AC power NOTE The port LED indicators provide separate data for each port 100 MB S Steady green LED indicates that port transmits and receives at 100 Mb s dark LED indicates 10 Mb s L INK Steady green LED indicates active port link connection H ALF D UPLEX Steady green LED indicates half duplex ...

Page 8: ...rove network performance by breaking the large CSMA CD collision domain into two separate collision domains called segments Network segmentation is achieved by regulating the number of data signals sent among stations Since the first two fields in an Ethernet data packet carry 48 bit source and destination addresses the pocket switch scans the destination address on each packet header received on ...

Page 9: ...to ST connector marked with an outbound arrow connect receive cable connector to ST connector marked with an inbound arrow 3 Connect cable installed at transmit TX connector of Transition Networks pocket switch at receive RX connector of device at other end connect cable installed at receive RX connector at transmit TX connector of device at other end of fiber cable When installed in a legacy 10BA...

Page 10: ...f duplex Ethernet Since there are only two devices on a full duplex link the link is not attempting to create a shared Ethernet channel capable of supporting multiple devices Therefore there is no need to adhere to the original Ethernet medium access control system With no need to use the CSMA CD medium access control mechanism to share the signal channel with multiple stations a device at the end...

Page 11: ...lisions on the segment by installing full duplex cards at the network interfaces in a network with Category 5 cables already installed allows a minimum investment to effectively double the network collision domain diameter Application behavior determines if a station can take advantage of the increased network capacity of full duplex Typical applications do not use bandwidth symmetrically File tra...

Page 12: ...tion by station basis as needed using incremental upgrades of station network interface cards and of cable Transition Networks Pocket Switch 18 9 The 512 Bit Rule 100BASE TX 100BASE FX A bit time BT is the amount of time required to send one data bit across an Ethernet LAN The total number of bit times between any two DTEs in the same Fast Ethernet 100BASE TX or 100BASE FX collision domain cannot ...

Page 13: ...oma i n Existing 100 Mb s C SMA CD Collision Doma i n Existing 10 Mb s Install Transition Networks Pocket Switch To Connect Legacy Ethernet to Fast Ethernet C SMA CD Collision Doma i n C SMA CD Collision Doma i n 100 meters 10 Mb s 100 meters 100 Mb s Installing Network Cable continued The 5 Segment Rule 10BASE T The Ethernet 10BASE T 5 segment rule defines a segment as the cable connection betwee...

Page 14: ...s for the entire collision domain In practice however half duplex fiber is limited to 111 meter distances and typically is used to connect a server to a workstation with no intervening hub Full duplex Fiber The 100BASE FX media system is designed to allow full duplex Fast Ethernet segments of up to 2000 meters in length The 2000 meter limit is possible because round trip timing collision domain sp...

Page 15: ...lex twisted pair only 3 Repeat for Port 2 twisted pair only NOTE Switch 4 is unused Network distances can be extended to up to 2000 meters by installing a full duplex fiber network interface card in the network device and then connecting fiber cable between the network device and the Transition Networks pocket switch Class I and Class II Fast Ethernet Repeaters Both 100BASE TX and 100BASE FX use t...

Page 16: ...works pocket switch Unpack Transition Networks pocket switch Install Transition Networks pocket switch on stable flat surface Set DIP switch Install network cable Power Transition Networks pocket switch Direction is provided in the pages that follow Unpacking the Transition Networks Pocket Switch The Transition Networks pocket switch packing contents should include the following Item Part Number T...

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