Raisecom RC831-240E User manual

www.raisecom.com
RC831-240E User Manual

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 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.
Java™ is a U.S. trademark of Sun Microsystems, Inc.
Microsoft® is a U.S. registered trademark of Microsoft Corporation.
Windows NT® is a U.S. registered trademark of Microsoft Corporation.
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: [phone]
Fax: [phone]
World Wide Web
You can access the most current Raisecom product information on the World Wide Web at the
following URL:
http://www.raisecom.com
Feedback
Comments and questions about how the RC831-240E 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:
http://www.raisecom.com/en/xcontactus/contactus.htm.
If you have comments on the device specification, instead of the web page above, please send
comments to:
[email protected]
We hope to hear from you!

CONTENTS
Release Notes------------------------------------------------------------------------------------------------- 6
General Safety Instructions ------------------------------------------------------------------------------ 7
Safety Symbols ---------------------------------------------------------------------------------------------------------------------7
Handling Energized Products ---------------------------------------------------------------------------------------------------7
General Safety Practices ------------------------------------------------------------------------------------------------------------------------7
Connection of AC Mains-------------------------------------------------------------------------------------------------------------------------8
Connection of DC Mains-------------------------------------------------------------------------------------------------------------------------8
Preventing Electrostatic Discharge Damage--------------------------------------------------------------------------------8
Chapter 1 Product Overview ------------------------------------------------------------------------- 1
1.1 Overview---------------------------------------------------------------------------------------------------------------------1
1.2 Function Features---------------------------------------------------------------------------------------------------------1
1.3 Ordering information------------------------------------------------------------------------------------------------------1
Chapter 2 Technical Specifications---------------------------------------------------------------- 4
2.1 Technical specifications of E1 interface ---------------------------------------------------------------------------------4
2.2 Technical specifications of the optical interface -----------------------------------------------------------------------4
2.3 The properties of theAgent network management interface-------------------------------------------------------4
2.4 Power supply-------------------------------------------------------------------------------------------------------------------5
2.5 Operating environment-------------------------------------------------------------------------------------------------------5
2.6 Storing environment ----------------------------------------------------------------------------------------------------------5
2.7 Outline and structure ---------------------------------------------------------------------------------------------------------5
Chapter 3 Device Appearance and Descripiton------------------------------------------------ 6
3.1 Device front panel-------------------------------------------------------------------------------------------------------------6
3.2 Device rear panel--------------------------------------------------------------------------------------------------------------6
3.3 Indicator Description----------------------------------------------------------------------------------------------------------6
3.4 Interface description----------------------------------------------------------------------------------------------------------7
3.5 Expansion slot description --------------------------------------------------------------------------------------------------8
Chapter 4 Device Settings--------------------------------------------------------------------------10
4.1 DIP switch description------------------------------------------------------------------------------------------------------10
4.1.1 The location of the DIP switches ----------------------------------------------------------------------------------------------------- 10
4.1.2 DIP switch description ------------------------------------------------------------------------------------------------------------------ 10
4.1.3 Default settings --------------------------------------------------------------------------------------------------------------------------- 13
Chapter 5 Basic Connection and Typical Application-------------------------------------14
5.1 Basic Connection------------------------------------------------------------------------------------------------------------14
5.1.1 Connect the optical interface---------------------------------------------------------------------------------------------------------- 14
5.1.2 Connect the Agent network management interface----------------------------------------------------------------------------- 14
5.1.3 Connect to the power supply---------------------------------------------------------------------------------------------------------- 14
5.2 Typical application-----------------------------------------------------------------------------------------------------------15
Chapter 6 Network Management Features----------------------------------------------------16
6.1 Network management platform------------------------------------------------------------------------------------------16
6.2 Network management query ---------------------------------------------------------------------------------------------16
6.3 Network management configuration------------------------------------------------------------------------------------16
Chapter 7 Device Installation Preparation and Connection -----------------------------17
7.1 Pre-installation checking and preparing-------------------------------------------------------------------------------17
7.1.1 Make sure that the cable applied matches the sub-cards on the device--------------------------------------------------- 17
7.1.2 Make sure that the fiber applied matches the requirement of the device-------------------------------------------------- 17
7.1.3 Confirm the fiber cable type applied------------------------------------------------------------------------------------------------- 17
7.2 Installation procedures-----------------------------------------------------------------------------------------------------17
7.2.1 Device installation------------------------------------------------------------------------------------------------------------------------ 17
7.2.2 Cable connection------------------------------------------------------------------------------------------------------------------------- 17
7.2.3 Device electrifying ----------------------------------------------------------------------------------------------------------------------- 18
Appendix A Cable Making--------------------------------------------------------------------------------19
A.1 PC-Agent network management cable making ---------------------------------------------------------------------19
Appendix B FAQ --------------------------------------------------------------------------------------------20

Release Notes
Date of Release Manual Version Revisions
20071128 200704 REV.A

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 transceivers
shall be connected with optical fiber wires or shield with optical transceiver 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.

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Chapter 1 Product Overview
1.1 Overview
RC831-240E series multi-service standalone PDH multiplexer is a fiber optic transmission device
applicable to point-to-point network or network with small or medium capacity, like wireless
communication base station, private networks, switch network and etc. RC831-240E series
multi-service PDH multiplexer realizes the transmission of at most 8 lines of E1 service on 1 line of
fiber. For the E1 tributary interface, RC831-240E provides 4 expansion slots. Together with
Raisecom’s E1 service sub-card, V.35 service sub-card, Ethernet service sub-card or other services
sub-cards, various multi-service configuration solutions can be flexibly realized with RC831-240E to
meet customers’ requirements.
RC831-240E multi-service PDH multiplexer can be deployed in a point-to-point application with
other PDH devices, like RC831/2 series devices, developed by Raisecom.
1.2 Function Features
¾8*2Mbps (E1, V.35, Fast-Ethernet and etc.) transmission capability
¾Provides 4 expansion slots
Provides multi-service interfaces with V.35 sub-card, Fast Ethernet sub-card and E1 sub-card
in the expansion slots.
¾Indication for both local and remote site alarm information and status information.
Optical interface alarm information and the working status of all E1s of both local and remote
devices can be displayed at the same time
¾Remote device power-off detection and alarm notification
¾At most 8 E1 interfaces working at 2048Kbps transparent transmission mode
¾ALS function is supported to effectively control the output of optical signal in no connection
status
¾Local and remote E1 tributary loopback testing function makes fault removal and
maintenance easier
¾Local and remote network management
In support of SNMP network management
¾In support of software online upgrade
¾Adopt grand-scale ASIC chip
Low power consumption
4-layer circuit board design guarantees high reliability.
1.3 Ordering information
Device Model Description
RC831-240E-S1 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, dual-strand, single-mode
(DSC/PC), transmission distance 0~25km, single power supply, AC

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or DC power supply
RC831-240E-S2 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, dual-strand, single-mode
(DSC/PC), transmission distance 10~60km, single power supply, AC
or DC power supply
RC831-240E-S3 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, dual-strand, single-mode
(DSC/PC), transmission distance 15~120km, single power supply,
AC or DC power supply
RC831-240E-SS13 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, single-strand,
single-mode (SC/PC), TX wavelength 1310nm, RX wavelength
1550nm, transmission distance 0~25km, single power supply, AC or
DC power supply
RC831-240E-SS15 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, single-strand,
single-mode (SC/PC), TX wavelength 1550nm, RX wavelength
1310nm, transmission distance 0~25km, single power supply, AC or
DC power supply
RC831-240E-SS23 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, single-strand,
single-mode (SC/PC), TX wavelength 1310nm, RX wavelength
1550nm, transmission distance 10~50km, single power supply, AC or
DC power supply
RC831-240E-SS25 Stand-alone device, 8 lines of E1 service provided by 4 expansion
slots in which sub-cards like E-SUBM-FV35, E-SUBM-2FV35,
E-SUBM-2FE, E-SUBM-FE4E1, E-SUBM-2E1, E-SUBM-4E1-BL,
and etc. can be inserted, 1 optical interface, single-strand,
single-mode (SC/PC), TX wavelength 1550nm, RX wavelength
1310nm, transmission distance 10~50km, single power supply, AC or
DC power supply

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LNote: The factual models of the stand-alone devices should have suffixes that describe the power supply of
the devices. For example: RC831-240E-S1-AC indicates device with 220V AC power supply, while
RC831-240E-S1-DC indicates device with -48V DC power supply.
The devices that can communicate with RC831-240E series devices are listed in the table below.
Client Site Device CO Site Device
RC831-240E-S1RC831-240E-S1
RC831/2-240-S1
RC831-240E-S2RC831-240E-S2
RC831/2-240-S2
RC831-240E-S3RC831-240E-S3
RC831/2-240-S3
RC831-240E-SS15RC831-240E-SS13
RC831/2-240-SS15
RC831-240E-SS13RC831-240E-SS15
RC831/2-240-SS13
RC831-240E-SS25RC831-240E-SS23
RC831/2-240-SS25
RC831-240E-SS23RC831-240E-SS25
RC831/2-240-SS23

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Chapter 2 Technical Specifications
2.1 Technical specifications of E1 interface
¾Bit rate: 2048Kbps±50ppm
¾Coding: HDB3
¾Frame format: comply with ITU-T G.704 recommendations
¾Physical characteristic: comply with ITU-T G.703 recommendations
¾Transfer characteristic: comply with ITU-T G.823 recommendations
¾Jitter tolerance: comply with ITU-T G.823 recommendations
2.2 Technical specifications of the optical interface
¾Bit rate: 150Mbps
¾Line coding: scrambled NRZ
¾Interface type: SC interface
¾Optical transmission parameter: different optical transceivers have different optical interface
parameters, please see the table below.
Optical
transceiver Wavelength (nm) LASER Type Receiver Transmitting Optical
Power (dBm)
Overload
(dBm) Receiving Sensibility (dBm) Transmission Distance (Km)
S1 1310 FP PIN -15, -8 > -8 < -34 0 ~ 25
S2 1310 FP PIN -5, 0 > -8 < -34 10 ~ 60
S3 1550 DFB PIN -5, 0 > -10 < -36 15 ~ 120
SS13 1310 FP PIN -12, -3 > -8 < -30 0 ~ 25
SS15 1550 FP/DFB PIN -12, -3 > -8 < -30 0 ~ 25
SS23 1310 FP PIN -5, 0 > -8 < -32 10 ~ 50
SS25 1550 DFB PIN -5, 0 > -8 < -32 10 ~ 50
LNote: The transmission distance in the table indicates the maximal transmission distance in typical optical
fiber condition. The transmission distance that can be realized depends on the factual status of the network.
2.3 The properties of the Agent network management interface
¾Interface type: RJ-45
¾Standard Compliance: RS232
¾Bit rate: 19200bps

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2.4 Power supply
AC power supply
¾Voltage: 220V
¾Allowance: 175 ~ 265V
¾Frequency: 50Hz
or:
¾Voltage: 110V/230V
¾Allowance: 85 ~ 265V
¾Frequency: 50Hz/60Hz
DC power supply
¾Voltage: -48V
¾Allowance: -36 ~ -72V
OR:
¾Voltage: +24V
¾Allowance: +18 ~ +36V
Power consumption: < 3W (without sub-card)
LNote: The device power consumption in the table indicates the maximal power consumption of the device
when it is operating with no modules. The factual power consumption of the device depends on the model and
number of modules applied.
2.5 Operating environment
¾Operating temperature: 0 ~ 60℃
¾Operating humidity: ≤90% (25℃)
2.6 Storing environment
¾Storing temperature: -40 ~ 80℃
¾Storing humidity: 5% ~ 90%, no condensation
2.7 Outline and structure
¾Physical outline: 19” stand-alone device, 1U in height
¾Dimension: 43.6mm (Height) x 440mm (Width) x 300mm (Depth)
¾Net Weight: < 4Kg

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Chapter 3 Device Appearance and Descripiton
3.1 Device front panel
Figure 3-1 The front panel of RC831-240E withAC power supply
Figure 3-2 The front panel of RC831-240E with DC power supply
3.2 Device rear panel
Figure 3-3 The rear panel of RC831-240E
3.3 Indicator Description
Power supply and system working status indicator:
¾PWR (Green):
ON: the power supply is working properly
OFF: the power supply for the device is cut off
¾LPR (Red):
ON: remote device power down
OFF: the power supply for the remote device is operating in order
Optical interface alarm indicator:
¾L-LOS (Red):
ON: loss of receiving signal (LOS) alarm at the local optical interface
¾R-LOS (Red):
ON: loss of receiving signal (LOS) alarm at the remote optical interface

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¾L-LOF (Red):
ON: loss of frame (LOF) alarm at the local optical interface
¾R-LOF (Red):
ON: loss of frame (LOF) alarm at the remote optical interface
¾L-E-3 (Red):
ON: the receiving signal bit error rate (BER) at the local optical interface exceeds 1E-3
¾R-E-3 (Red):
ON: the receiving signal BER at the remote optical interface exceeds 1E-3
¾L-E-6 (Yellow):
ON: the receiving signal BER at the local optical interface exceeds 1E-6
¾R-E-6 (Yellow):
ON: the receiving signal BER at the remote optical interface exceeds 1E-6
E1 signal connection status indicator:
¾L-E1 USED (1~8) (Green):
ON: the local E1 tributary 1~8 are well connected
OFF: loss of receiving signal alarm occurs at the local E1 tributary 1~8
¾R-E1 USED (1~8) (Green):
ON: the remote E1 interface 1~8 are well connected
OFF: loss of receiving signal alarm occurs at the remote E1 tributary 1~8
3.4 Interface description
Optical interface:
¾For device models with optical transceivers using dual-strand optical transceivers, the optical
interface is DSC/PC interface. “TX” indicates optical signal output. “RX” indicates optical
signal input.
¾For device models with optical transceivers using signal-strand optical transceivers, the
optical interface is SC/PC interface.
Network management interface:
¾LNK-UP
Local network management interface or cascade interface.
Connect to the serial port of the PC for network management or connect to the LNK-DWN
interface of the device on the higher level in the cascade. It is a RJ-45 interface. Comply with
RS232 electrical level standard. The port will be working at the rate of 19200bps.
¾LNK-DWN
Cascade interface.
Connect to the LNK-UP interface of the device on the lower level of the cascade. Comply
with RS232 electrical level standard. The port will be working at the rate of 19200bps.
LNote:
1. When the software online upgrade function is enabled, the connection of the LNK-UP interface and the
serial port of the PC or the connection of the LNK-UP interface with the LNK-DWN interface on the device
on the higher level is only for the use of software online upgrade. In this circumstance, the network

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management function is inapplicable.
2. For the pin arrangement of the cable connecting the LNK-UP interface and the serial port of the PC, please
refer to Appendix A.1.
3. For the connection of an LNK-UP interface and an LNK-DWN interface, please use RJ-45-RJ-45 flat
straight-through cable.
Power supply interface:
¾AC power supply interface
The AC power supply interface is a 3-phase AC power supply interface. Please make sure
that the power supply of the device is well earthed. For AC power supply without grounding
terminal, please connect the grounding terminal on the right of the device with the protection
earth of the device room.
¾DC power supply interface
The DC power supply interface has 3 terminals: -48V, PGND and BGND. Please make sure
that the PGND terminal is connected to the protection earth. Note that the grounding terminal
on the right of the device and the PGND terminal of the DC power supply are connected in
the device, and please be sure that one of them is well connected to the protection earth.
3.5 Expansion slot description
RC831-240E has 4 expansion slots, and they are titled SLOT1, SLOT2, SLOT3 and SLOT4. Various
expansion sub-cards can be inserted into these expansion slots to provide excellent configuration
flexibility, and to meet different requirements from customers. The table below lists some typical
configurations:
Slot Number SLOT1 SLOT2 SLOT3 SLOT4
Maximum
Transmission
Capacity
4 E1 2 E1 4 E1 2 E1
E1 Line
Occupation
E1 1~4 E1 3~4 E1 5~8 E1 7~8
E-SUBM-FV35
(occupies E1 1)
E-SUBM-FV35
(occupies E1 3)
E-SUBM-FV35
(occupies E1 5)
E-SUBM-FV35
(occupies E1 7)
E-SUBM-2FV35
(occupies E1 1~2)
E-SUBM-2FV35
(occupies E1 3~4)
E-SUBM-2FV35
(occupies E1 5~6)
E-SUBM-2FV35
(occupies E1 7~8)
E-SUBM-2E1
(occupies E1 1~2)
E-SUBM-2E1
(occupies E1 3~4)
E-SUBM-2E1
(occupies E1 5~6)
E-SUBM-2E1
(occupies E1 7~8)
E-SUBM-2FE
(occupies E1 1~2)
E-SUBM-2FE
(occupies E1 3~4)
E-SUBM-2FE
(occupies E1 5~6)
E-SUBM-2FE
(occupies E1 7~8)
Multi-service
Configuration
Example
E-SUBM-FE4E1 E-SUBM-FE4E1

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(occupies E1 1~4) (occupies E1 5~8)
E-SUBM-4E1-BL
(occupies E1 1~4)
E-SUBM-4E1-BL
(occupies E1 5~8)
LNote: When the sub-cards in the expansion slot SLOT1 and SLOT3 are sub-cards that occupy 4 lines of E1,
the expansion slot SLOT2 and SLOT4 can not be used.

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Chapter 4 Device Settings
4.1 DIPswitch description
4.1.1 The location of the DIP switches
The DIP switches are placed on the front panel of RC831-240E, please see the figures that shows the
device front panel.
4.1.2 DIP switch description
There are 2 DIP switches on the front panel of the device: SW1 and SW2. For SW1, the 8 bits from
the left to the right are bit 1~8. When a bit of the switch is turned to the lower side, it means that the
bit is turned ON. When a bit of the switch is turned to the upper side, it means that the bit is turned
OFF.
Function setting switch SW1:
Definition OFF ON
Bit 1 LOOP1
Bit 2 LOOP2
Bit 3 LOOP3
Bit 4 LOOP4
Loopback control switch
Bit 5 Loopback point Remote E1 loopback Local E1 loopback
Bit 6 Reserved Default status
Bit 7 ALS function Disable Enable
Bit 8 Software online upgrade Disable Enable
¾Bit 1~4: loopback control switch
Bit 1 Bit 2 Bit 3 Bit 4 Loopback control
OFF OFF OFF OFF No E1 loopback
OFF OFF OFF ON E1 1 loopback
OFF OFF ON OFF E1 2 loopback
OFF OFF ON ON E1 3 loopback

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OFF ON OFF OFF E1 4 loopback
OFF ON OFF ON E1 5 loopback
OFF ON ON OFF E1 6 loopback
OFF ON ON ON E1 7 loopback
ON OFF OFF OFF E1 8 loopback
ON ON ON ON All E1 loopback
LNote: The loopback control function provides two ways of loopback testing: single E1 loopback or all E1
loopback. When conducting single loopback testing, the communication of other E1 lines will not be affected.
For the status combinations of Bit 1~4 that are not listed in the table above, there will be no E1 loopback.
¾Bit 5: loopback point selection switch
When setting loopback testing using the first 4 bits of SW1, Bit 5 of SW1 is used for
selecting the loopback point, that is, deciding whether the loopback is a remote loopback or a
local one. The loopback point of the remote E1 loopback and local E1 loopback are shown in
the Figure 4-1 and Figure 4-2, respectively.
Bit 5 Loopback point selection
OFF Remote E1 loopback
ON Local E1 loopback
Figure 4-1 The settings of “remote loopback” on the local PDH multiplexer
Local Remot
e
Fiber
E1 Sid
eE1 Sid e
BER Tester
Figure 4-2 The settings of the “local loopback” on the local PDH multiplexer

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LNote:
1. Before setting up the remote E1 loopback testing, please make sure that there is no alarm at the
optical interface.
2. To set up any loopback on the local PDH multiplexer, the loopback settings of the remote device
must by NO loopback.
¾Bit 6: Reserved
¾Bit 7: Auto-Laser-Shutdown (ALS) function switch
Bit 7 ALS function
OFF Disable
ON Enable
When the Auto-Laser-Shutdown function is enabled, the TX of the optical transceiver will be shut
down if loss of receiving signal alarm occurs at the optical interface.
¾Bit 8: software online upgrade function switch
Bit 8 Software online upgrade function
OFF Disable
ON Enable
When the software online upgrade function is enabled, users can upgrade the software on the
device at the local site via serial COM port of a PC. The software online upgrade function
makes device maintenance and upgrade easier. For a RC831-240E device under regular use,
please do not change the status of the switch and keep its default setting (OFF). Otherwise,
the improper setting of the switch may lead to operation abnormity.
LNote: Before electrifying the device, please make sure that the status of SW1 Bit 8 is OFF. Otherwise, the
device can not start properly.
Address code setting switch SW2:
When the 4 bits of the address code setting switch SW2 are all OFF, the device can be managed as a
remote device. Otherwise, the device can be managed by the serial port of a local PC via the
LNK-UP interface on the device. Different device in the cascade of one serial port must have
different address code. For the 4-bit DIP switch SW2, the 4 bits from the left to the right are bit 1~4.
At most 15 devices are allowed to be in one local cascade.
The table below lists the relationship between the settings of SW2 and the address code of the
device.