Legal Notices
Raisecom Technology Co., Ltd makes no warranty of any kind with regard to this manual,
including, but not limited to, the implied warranties of merchantability and fitness for a particular
purpose. Raisecom Technology Co., Ltd shall not be held liable for bit errors contained herein or
direct, indirect, special, incidental or consequential damages in connection with the furnishing,
performance, or use of this material.
Warranty.
A copy of the specific warranty terms applicable to your Raisecom product and replacement parts
can be obtained from Service Office.
Restricted Rights Legend.
All rights are reserved. No part of this document may be photocopied, reproduced, or translated to
another language without the prior written consent of Raisecom Technology Co., Ltd. The
information contained in this document is subject to change without notice.
Copyright Notices.
Copyright ©2007 Raisecom. All rights reserved.
No part of this publication may be excerpted, reproduced, translated or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in
Writing from Raisecom Technology Co., Ltd.
Trademark Notices
is the trademark of Raisecom Technology Co., Ltd.
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Microsoft® is a U.S. registered trademark of Microsoft Corporation.
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Windows® 2000 is a U.S. registered trademark of Microsoft Corporation.
Windows® XP is a U.S. registered trademark of Microsoft Corporation.
Windows® and MS Windows® are U.S. registered trademarks of
Microsoft Corporation.
Contact Information
Technical Assistance Center
The Raisecom TAC is available to all customers who need technical assistance with a Raisecom
product, technology, or, solution. You can communicate with us through the following methods:
Address: 2nd Floor, South Building of Rainbow Plaza, No.11 Shangdi Information Road,
Haidian District, Beijing 100085
Tel: +86-10-82883305
Fax: +86-10-82883056
World Wide Web
You can access the most current Raisecom product information on the World Wide Web at the
following URL:
HTUhttp://www.raisecom.comUTH
Feedback
Comments and questions about how the RC902-FE4E1-BL (REV.A) device works are welcomed.
Please review the FAQ in the related manual, and if your question is not covered, send email by
using the following web page:
HTUhttp://www.raisecom.com/en/xcontactus/contactus.htmUTH.
If you have comments on the RC902-FE4E1-BL (REV.A) specification, instead of the web page
above, please send comments to:
HTU[email protected]UTH
We hope to hear from you!
CONTENTS
TUChapter 1UT TUOverviewUT -------------------------------------------------------------------------------------- 7
TU1.1 InstructionUT -----------------------------------------------------------------------------------------------------------------------7
TU1.2 FeaturesUT---------------------------------------------------------------------------------------------------------------------------7
TU1.3 Ordering informationUT ---------------------------------------------------------------------------------------------------------7
TUChapter 2UT TUTechnical ParametersUT ----------------------------------------------------------------------- 8
TU2.1 E1 interface technical dataUT ---------------------------------------------------------------------------------------------------8
TU2.2 Optical interface technical dataUT ---------------------------------------------------------------------------------------------8
TU2.3 Power supplyUT --------------------------------------------------------------------------------------------------------------------8
TU2.4 Operating environmentUT -------------------------------------------------------------------------------------------------------8
TU2.5 Storing environmentUT -----------------------------------------------------------------------------------------------------------8
TU2.6 Device outlineUT--------------------------------------------------------------------------------------------------------------------8
TUChapter 3UT TUDevice Panel Appearance and InstructionUT ---------------------------------------------- 9
TU3.1 Device panel appearanceUT ------------------------------------------------------------------------------------------------------9
TU3.2 Indicator definitionUT-------------------------------------------------------------------------------------------------------------9
TU3.3 Interface instructionUT --------------------------------------------------------------------------------------------------------- 10
TUChapter 4UT TUDevice Setting InstructionUT ----------------------------------------------------------------11
TU4.1 Dip switch setting instructionUT ---------------------------------------------------------------------------------------------- 11
TU4.1.1 Dip switch locationUT --------------------------------------------------------------------------------------------------------------------------11
TU4.1.2 Dip switch definitionUT ------------------------------------------------------------------------------------------------------------------------11
TU4.1.3 Default settingUT --------------------------------------------------------------------------------------------------------------------------------15
TUChapter 5UT TUTypical ApplicationUT -------------------------------------------------------------------------16
TUChapter 6UT TU Network Management PropertyUT --------------------------------------------------------17
TU6.1 Network management platformUT ------------------------------------------------------------------------------------------- 17
TU6.2 Network management queryUT ----------------------------------------------------------------------------------------------- 17
TU6.3 Network management configurationUT ------------------------------------------------------------------------------------- 17
TUChapter 7UT TUInstallationUT -----------------------------------------------------------------------------------18
TU7.1 Pre-installation check-up and preparationUT------------------------------------------------------------------------------ 18
TU7.2 InstallationUT --------------------------------------------------------------------------------------------------------------------- 18
TU7.2.1 Device fixingUT ---------------------------------------------------------------------------------------------------------------------------------18
TU7.2.2 Cable connectingUT -----------------------------------------------------------------------------------------------------------------------------18
TU7.2.3 Power onUT --------------------------------------------------------------------------------------------------------------------------------------18
TUAppendix A AcronymsUT ---------------------------------------------------------------------------------------19
TUAppendix B Frequently Asked QuestionsUT ----------------------------------------------------------------20
General Safety Instructions
The following instructions serve as a general guide for the safe installation and operation of telecommunications
products. Additional instructions, if applicable, are included inside the manual.
Safety Symbols
This symbol may appear on the equipment or in the text. It indicates potential
safety hazards regarding product operation or maintenance to operator or service
personnel.
Danger of electric shock! Avoid any contact with the marked surface while the
product is energized or connected to outdoor telecommunication lines.
Protective earth: the marked lug or terminal should be connected to the building
protective earth bus.
Some products may be equipped with a laser diode. In such cases, a label with
the laser class and other warnings as applicable will be attached near the optical
transmitter. The laser warning symbol may be also attached.
Please observe the following precautions:
• Before turning on the chassis with optic module, make sure that the fiber optic
cable is intact and is connected to the transmitter.
• Do not attempt to adjust the laser drive current.
• Do not use broken or unterminated fiber-optic cables/connectors or look straight at the
laser beam.
• The use of optical devices with the equipment will increase eye hazard.
• Use of controls, adjustments or performing procedures other than those specified herein, may
result in hazardous radiation exposure.
ATTENTION: The laser beam may be invisible!
Always observe standard safety precautions during installation, operation and maintenance of this
product. Only qualified and authorized service personnel should carry out adjustment, maintenance
or repairs to this product. No installation, adjustment, maintenance or repairs should be performed by
either the operator or the user.
All extension slots are not hot-swappable
Before operating modules in the electricity conditions, please be noticed that optical modules shall
be connected with optical fiber wires or shield with optical module cover for fear that laser light
harms to operator’s eyes.
Handling Energized Products
General Safety Practices
Do not touch or tamper with the power supply when the power cord is connected. Line voltages may
be present inside certain products even when the power switch (if installed) is in the OFF position or
a fuse is blown. For DC-powered products, although the voltages levels are usually not hazardous,
energy hazards may still exist.
Before working on equipment connected to power lines or telecommunication lines, remove jewelry
or any other metallic object that may come into contact with energized parts.
Unless otherwise specified, all products are intended to be grounded during normal use. Grounding
is provided by connecting the mains plug to a wall socket with a protective earth terminal. If an earth
lug is provided on the product, it should be connected to the protective earth at all times, by a wire
with a diameter of 18 AWG or wider. Rack-mounted equipment should be mounted only in earthed
racks and cabinets.
Always make the ground connection first and disconnect it last. Do not connect telecommunication
cables to ungrounded equipment. Make sure that all other cables are disconnected before
disconnecting the ground.
Connection of AC Mains
Make sure that the electrical installation complies with local codes.
Always connect the AC plug to a wall socket with a protective ground.
Always connect the power cord first to the equipment and then to the wall socket. If a power switch
is provided in the equipment, set it to the OFF position. If the power cord cannot be readily
disconnected in case of emergency, make sure that a readily accessible circuit breaker or emergency
switch is installed in the building installation.
Connection of DC Mains
Unless otherwise specified in the manual, the DC input to the equipment is floating in reference to
the ground. Any single pole can be externally grounded.
Due to the high current capability of DC mains systems, care should be taken when connecting the
DC supply to avoid short-circuits and fire hazards.
DC units should be installed in a restricted access area, i.e. an area where access is authorized only to
qualified service and maintenance personnel.
Make sure that the DC supply is electrically isolated from any AC source and that the installation
complies with the local codes.
Before connecting the DC supply wires, ensure that power is removed from the DC circuit. Locate
the circuit breaker of the panel board that services the equipment and switch it to the OFF position.
When connecting the DC supply wires, first connect the ground wire to the corresponding terminal,
then the positive pole and last the negative pole. Switch the circuit breaker back to the ON position.
A readily accessible disconnect device that is suitably rated and approved should be incorporated in
the building installation.
Preventing Electrostatic Discharge Damage
Modules which can be plugged into chassis are sensitive to damage from static electricity.
Conversely, static voltages as high as 35,000V can be generated just by handling plastic or foam
packing material, or by sliding assemblies across plastic and carpets. Not exercising the proper
electrostatic discharge (ESD) precautions can result in intermittent or complete component failures.
To minimize the potential for ESD damage, observe the following guidelines:
• Always use an ESD-preventive antistatic wrist strap or ankle strap and ensure that it makes good
skin contact.
• When removing or installing a component, make sure the equipment end of your antistatic strap
leash is connected to the ESD connection sockets on the front of the chassis or to a bare metal
surface on the chassis. Avoid contact between the component and your clothing. The wrist strap only
protects the component from ESD voltages on the body; ESD voltages on your clothing can still
cause component damage.
• Always place a card component-side-up on an antistatic surface, in an antistatic card rack, or in a
static shielding bag. If you are returning the item to the factory, immediately place it in a static
shielding bag.
• Handle Modules by the metal card carrier edges only; Avoid touching the board or any connector
pins.
7
Chapter 1 Overview
1.1 Instruction
RC902-FE4E1-BL is a Fast Ethernet to 4 E1 interface converter with the up-to-date inverse multiplexing
function, which is one of the most widely used Ethernet access solution using E1 resources.
RC902-FE4E1-BL modular interface converter is a communication device provides the conversion from
10/100M self-adaptive Ethernet interface to 4 E1 interfaces. The device can be plugged into Raisecom
chassis and realizes SNMP network management. It realizes remote management by communicating with
RC901-FE4E1 or RC902-FX4E1.
1.2 Features
¾ One 10/100M self-adaptive Ethernet twisted pair interface
¾ Four 120Ω balanced connectors for 4 ways of E1 signal
¾ All-around E1 alarm types including local and remote alarms
¾ Loop back testing function for local and remote E1 interface to facilitate bit error judgment
¾ Real-time bit error detection and E1 channel automatic protection and recovery function
¾ Improved adapting ability to acute jitter and wander in complicated network environment
¾ IEEE802.1q VLAN packet transparent transmission supported; spanning tree protocol based
fault-tolerance network construction supported
¾ Grand scale ASIC chip adoption to ensure low power consumption; 4-layer PCB based design to
ensure high reliability
¾ Working in RC002-16 16-slot chassis, RC002-4 4-slot chassis and RC001 single-slot chassis with
build-in power supply
1.3 Ordering information
Table 1-1 RC902-FE4E1-BL product ordering information
Device model Description
RC902-FE4E1-BL Modular device
4 120Ω balanced E1 interface (2 RJ-45)
1 10/100M self-adaptive Ethernet twisted pair interface
8
Chapter 2 Technical Parameters
2.1 E1 interface technical data
¾ Standard compliance: ITU-T G703, G704, G823
¾ Interface type: RJ-45
¾ Interface impedance: 120Ω
¾ Interface rate: 2048Kbps±50ppm
¾ Code pattern: HDB3
¾ Jitter: resist 512UI wander
¾ Electrical property: compliant to ITU-T G703
¾ Transfer property: compliant to ITU-T G823
¾ Function property: line bit error detection and line auto-cutoff. Cut off the line automatically when
bit error ratio exceeds 10P
-6
P
2.2 Optical interface technical data
¾ Standards compliance: IEEE802.3, IEEE802.3u
¾ Transmission rate: 10M/100M self-adaptation
¾ Duplex mode: auto-negotiation
¾ Frame length: 1536 bytes
¾ Flow control: enable flow control function
¾ Buffer: 64Mbit SDRAM
¾ Other properties: IEEE802.1d Spanning Tree supported; IEEE802.1q VLAN packet transparent
transmission support
¾ Automatic cross connection recognition: connect switches and network cards with direct connection
or cross connection at will
¾ Failover function: automatically close down Ethernet interface when all E1 links are inapplicable
2.3 Power supply
¾ Device power consumption: 3W
2.4 Operating environment
¾ Temperature: 0~45℃
¾ Humidity: ≤90%（25℃）
2.5 Storing environment
¾ Temperature: -40~80℃
¾ Humidity: 5%～90%, non-condensing
2.6 Device outline
¾ Physical outline: modular device
¾ Dimension: 91mm(Width) × 25mm(Height) × 172mm(Depth)
¾ Net weight: 0.13Kg
9
Chapter 3 Device Panel Appearance and Instruction
3.1 Device panel appearance
3.2 Indicator definition
E1 line indicator:
A, B, C, D (Three-color indicator): A, B, C, D four E1 line indicators
Pattern Definition
Green On The corresponding E1 link is working in order
Red On Loss of receiving signal (LOS) alarm occurs on the
corresponding E1 link while no LOS occurs on the
E1 link of the other side
Red Flickering AIS, LOF, or Line for receiving signal coding
violation (CV) alarm occurs on the corresponding
E1 link
Yellow Incorrect pin arrangement for local receiving on the
corresponding E1 link
Yellow Fast Flickering Incorrect remote pin arrangement on the
corresponding E1 link (local pin arrangement is
correct)
Red-Green Alternate Flickering: Bit error ratio (BER) on the corresponding E1 link
exceeds the threshold
Yellow Slow Flickering Remote device alarm (RAL), including LOS, AIS,
LOF, CV, threshold-exceeding bit error ratio, occurs
on the E1 link. (No local fault occurs)
Off The corresponding link is not in use.
These indicators will take several seconds to judge the status of the four E1 links after electrifying,
connecting E1 cable and disconnecting E1 cable. The status of E1 link will not be shown correctly by the
10
corresponding indicator until the judgment completes. Please wait for the correct indication with patience.
Ethernet indicator:
Indicator Color Definition
LNK Green Interface connection indicator
On: Network cable has been connected correctly
Off: Network cable has not been connected correctly.
100M Green Interface rate indicator
On: 100Mbps
Off: 10Mbps
FDX Green Interface duplex indicator
On: full-duplex
Off: half-duplex
Flickering: Collision occurs under half-duplex mode
ACT Green Interface operation indicator
Flickering: data transmitting or receiving
Off: no data transmitting or receiving
3.3 Interface instruction
A, B, C, D four E1 balanced interface:
Provide four ways of E1 120Ω balanced signal by combination of two RJ-45 sockets.
E1 A and B use one RJ-45 connector:
E1 A: PIN 1 and 2 Output; PIN 4 and 5 Input
E1 B: PIN 7 and 8 Output; PIN 3 and 6 Input
E1 C and D use one RJ-45 connector:
E1 C: PIN 1 and 2 Output; PIN 4 and 5 Input
E1 D: PIN 7 and 8 Output; PIN 3 and 6 Input
L Note: The pin arrangement of the interface must be correct. Please read the pin arrangement
instruction with caution before making balanced cable.
11
Chapter 4 Device Setting Instruction
4.1 Dip switch setting instruction
4.1.1 Dip switch location
There is an 8-bit dip switch SW1 on the back of the PCB.
ON
12345678
SW1
4.1.2 Dip switch definition
SW1 definition:
Dip switch bit
definition OFF (Factory default) ON
Bit 1
Remote E1
loop back
Normally operating Enable remote E1 loop back testing
Bit 2
Local
bidirectional
loop back
Normally operating Enable local bidirectional loop back
testing
12
Bit 3
BER cutoff
No cutoff at any BER Cutoff when BER exceeds 10P
-6
P
Bit 4
Compatibility
setting
Device on the other side
could be all RC901/2 4E1
device excluding
RC901-FE4E1 REV.A/B
Device on the other side should be old
version RC901-FE4E1 REV.A/B
Bit 5
Reserved
Normally operating Reserved
Bit 6
Ethernet
interface
setting
Bit 7
Ethernet
interface
setting
Please refer to the next table.
Bit 8
Failover
Disable failover function Enable failover function
Remote E1 loop back:
When there is at least one E1 link connected to the remote device properly, the remote loop back function
will have all E1 interfaces of remote device loop back. The BER testing of other E1 links can be performed
at local site. This function is designed for testing connection and measuring BER. Users do not have to
setup the status of remote device by themselves. When performing remote loop back, the local and remote
Ethernet packets are both isolated from E1 links.
13
Local bidirectional loop back
When performing local loop back, RC902-FE4E1 will loop back all E1 and Ethernet signal. This function is
designed for testing the device interface circuit. Users can apply E1 BERT to test E1 interface, and apply
Sniffer software to test the Ethernet interface. Please note that when performing local bidirectional loop
back, Ethernet data will be looped back as well. As a result, it is possible to bring about broadcast storm on
Ethernet Switch. In order to prevent broadcast storm from happening, please disconnect the cable
connecting to Ethernet Switch before performing local bidirectional loop back.
Link protection and recovery based on link BER
If this switch is on and the E1 link BER exceeds 10P
-6
P threshold, the indicator corresponds to the E1 link will
become steady yellow and the service on the E1 link will be suspended, thus, Ethernet packets will not be
forwarded on to the E1 link. When the BER reduces to 10P
-9
P, the indicator will become steady green and the
service will recover. If BER of all E1 links exceed the threshold, links will not be disconnected to ensure
communication. Alarms will occur on these links.
If this switch is off, the function will be disabled. The enabling and disabling of the function will not affect
the display of link alarm.
E1 Link
E1 BERT
Sniffer
Sketch of local loop-back at local site
Link A
Link B
Link C
Link D
Et
h
Remote
RC901-
FX4E1
Local
RC902-
FX4E1
E1 Link
Etherne
t
BERT
BERT
BERT
Etherne
t
Sketch of remote loop-back at local site
Link A
Link B
Link C
Link D
Link A
Link B
Link C
Link D
14
Compatibility setting
This switch is designed to have this converter be compatible with RC901-FE4E1Rev. A and Rev. B.
When RC902-FX4E1-BL communicates with RC902-FE4E1 Rev. A and Rev. B, this switch should be
turned on to disable the new features of this version, such as remote loop back.
When this converter communicates with RC901-FE4E1 Rev. C, this switch should be turned off to enable
remote loop back. If this switch is turned on, the compatibility setting switch of RC901-FE4E1 Rev. C on
the other side of communication should also be turned on and remote loop back function will be disabled.
Setting the compatibility setting switch of both local and remote converters to “ON” is recommended when
communicating with Rev. C converter.
When this converter communicates with RC902-FE4E1 Rev. D, this switch should be turned off to enable
E1 remote loop back and remote network management through Raisecom network management platform.
Ethernet interface operating status setting
The default operating status of Ethernet interface is self-adaptation status with cross-connect
auto-recognition function. Users can modify Ethernet interface operating status by the setting in the
following table:
Connecting
device (network
card, switch, and
etc.) interface
Correct setting of converter Ethernet interface
10/100M
self-adaptive
interface
Keep the factory default setting, 100M full-duplex connection can be
achieved (frequently used connection)
Set converter operating status to 10M half-duplex, 10M half-duplex
connection can be achieved
Set converter operating status to 10M full-duplex, 10M full-duplex
connection can be achieved
Set converter operating status to 100M half-duplex, 100M half-duplex
connection can be achieved
10M half-duplex
interface
The operating status of the converter should be set to 10M half-duplex
mode, 10M half-duplex connection can be achieved
10M full-duplex
interface
Keep the factory default setting, 10M full-duplex connection can be
achieved
10M duplex
auto-negotiation
interface
Keep the factory default setting, 10M full-duplex connection can be
achieved
100M half-duplex
interface
The operating status of the converter should be set to 100M half-duplex
mode, 100M half-duplex connection can be achieved.
15
100M full-duplex
interface
Keep factory default setting, 100M full-duplex connection can be achieved
100M duplex
auto-negotiation
interface
Keep factory default setting, 100M full-duplex connection can be achieved
Setting rule:
Bit 6 Bit 7
OFF OFF Factory default
OFF ON 100M half-duplex
ON OFF 10M full-duplex
ON ON 10M half-duplex
Failover function
Failover function is for users with special need. In the case that all 4 E1 are inapplicable or remote Ethernet
interface status change from “Link up” to “Link down”, the local Ethernet interface will be automatically
closed down until the fault has been removed.
4.1.3 Default setting
Default setting of all bits of SW1 is OFF.
16
Chapter 5 Typical Application
As is shown in the figure above, both central office 1 and 2 must apply Raisecom RC901 and RC902 series
4 E1 converters.
The device with 4 E1 channels must support E1 data transparent transmission, like SDH, PDH, and etc.
For devices communicate with the 4 E1 interfaces, please follow the instruction in the following table:
Central office 1
device
Central office 2
device
Remote management ability of network
management module placed at central office 1
RC901-FE4E1 Configure and query all interface parameters of
central office 1 and 2 device
RC902-FE4E1 Configure and query all interface parameters
excluding the parameters of Ethernet interface at
central office 2. Parameters of Ethernet interface
at central office 2 can only be queried.
RC902-FE4E1-BL
RC902-FX4E1 or
RC912-FX4E1
Configure and query all interface parameters
excluding the parameters of Ethernet interface at
central office 2. Parameters of Ethernet interface
at central office 2 can only be queried.
Twisted Pair
LAN 1
RC902-FE4E1-BL
4 Line of E1
RC901-FE4E1
or RC902-FE4E1
SDH/PDH
Transmission
Network
4 Line of E1
LAN 2
Twisted Pair
Central Office 1
Central Office 2
17
Chapter 6 Network Management Property
6.1 Network management platform
The status information of RC902-FE4E1-BL can be viewed, controlled and configured through Raisecom
network management platform RC002_1.19(Build2) and all above versions.
6.2 Network management query
¾ The status of remote E1 loop back and local bidirectional loop back
¾ The status of BER cutoff switch and compatibility setting switch
¾ The status of E1 links
¾ The setting status of E1 open and E1 closedown
¾ The type of device to which E1 is communicating
¾ Ethernet interface status of local and remote devices
6.3 Network management configuration
¾ The setup of remote E1 loop back and local bidirectional loop back
¾ The open up and close down of E1 link
¾ Local and remote device Ethernet interface setting
¾ The restoration of local and remote devices
18
Chapter 7 Installation
7.1 Pre-installation check-up and preparation
¾ Please check the model and the number of the device and spare parts against the packing list. Please
be sure that the appearance of the device is intact. If there is any evidence that the device has been
affected by damp, please dry it before installation.
¾ Pleas read this manual with caution before installation
¾ Prepare all cables and make sure that there’s no short circuit and no open circuit
¾ Make sure that the voltage of the power supply satisfies the operating condition of the device; make
sure that the device has been properly grounded
¾ Prepare a BER tester to monitor the quality of connection
¾ Fix the chassis into a 19-inch rack or place it on a stable and safe location; please be aware of the
environment in which the chassis is placed
¾ Please be sure that the E1 cable matches the connection device model.
Users can choose E1 cable from 22AWG twisted pair and 24AWG twisted pair.
If the E1 link connecting RC902-FE4E1-BL is constructed by PDH, SDH devices, for the type,
definition, impedance of the E1 interface on these devices, please refer to their user manual.
7.2 Installation
7.2.1 Device fixing
Place the chassis onto the rack, and plug the module into the slot on the chassis. Tighten the screws.
Dip switch should be set correctly before installing the module if network management is unused.
7.2.2 Cable connecting
Connect E1 interface connecting cable and Ethernet cable correctly.
7.2.3 Power on
Electrify the device after placing and fixing the module properly.
20
Appendix B Frequently Asked Questions
Ethernet link indicator (LNK) is off
Please check whether the network cable has broken down or whether the network devices (e.g. switch) are
operating properly.
Please check whether the devices are connected following connecting rules: if the self-adaptation and
self-cross connection function are turned off, the device should be connected to switch or HUB using direct
network connection and connected to router or network card using cross connection.
Please check whether the failover function has been enabled, for failover function will have local Ethernet
interface automatically shut down if E1 link fault or remote Ethernet interface fault occur.
E1 link indicator alarm
Please locate the cause of alarm using indicator definition in chapter 3.
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