Raisecom RC831-60-FV35-M-AC, RC831-60-FV35-S3-AC, RC831-60-FV35-S1-AC, RC831-60-FV35-S2-AC, RC831-60-FV35-SS13-AC User Manual

RC831-60-FV35 User Manual

www.raisecom.com

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

information contained in this document is subject to change without notice.

Copyright Notices.

Copyright ©2007 Raisecom

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

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. All rights reserved.

.

is the trademark of Raisecom Technology Co., Ltd.

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Windows® XP is a U.S. registered trademark of Microsoft Corporation.

Windows® and MS Windows® are U.S. registered trademarks of

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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: 2

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

nd

Floor, South Building of Rainbow Plaza, No.11 Shangdi Information Road,

Haidian District, Beijing 100085

Feedback

Comments and questions about how the RC831-60-FV35(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:

http://www.raisecom.com/en/xcontactus/contactus.htm.

If you have comments on the RC831-60-FV35 specification, instead of the web page above, please

send comments to:

[e-mail]

We hope to hear from you!

CONTENTS

Release Notes------------------------------------------------------------------------------------------------- 5
General Safety Instructions------------------------------------------------------------------------------ 6

Safety Symbols ---------------------------------------------------------------------------------------------------------------------6
Handling Energized Products ---------------------------------------------------------------------------------------------------6

General Safety Practices ------------------------------------------------------------------------------------------------------------------------ 6
Connection of AC Mains-------------------------------------------------------------------------------------------------------------------------7
Connection of DC Mains-------------------------------------------------------------------------------------------------------------------------7

Preventing Electrostatic Discharge Damage--------------------------------------------------------------------------------7

Chapter 1 Product Overview ------------------------------------------------------------------------- 1

1.1 Overview---------------------------------------------------------------------------------------------------------------------1

1.2 Function Features---------------------------------------------------------------------------------------------------------1

1.3 Ordering information------------------------------------------------------------------------------------------------------1

Chapter 2 Technical Specifications ---------------------------------------------------------------- 5

2.1 Technical specifications of E1 interface ---------------------------------------------------------------------------------5

2.2 Technical specifications of the optical interface -----------------------------------------------------------------------5

2.3 Power supply-------------------------------------------------------------------------------------------------------------------5

2.4 Operating environment-------------------------------------------------------------------------------------------------------6

2.5 Storing environment ----------------------------------------------------------------------------------------------------------6

2.6 Outline and structure ---------------------------------------------------------------------------------------------------------6

Chapter 3 Device Appearance and Descripiton------------------------------------------------ 7

3.1 Device front panel-------------------------------------------------------------------------------------------------------------7

3.2 Device rear panel--------------------------------------------------------------------------------------------------------------7

3.3 Indicator definition-------------------------------------------------------------------------------------------------------------8

3.4 Interface description--------------------------------------------------------------------------------------------------------10

Chapter 4 Device Settings ---------------------------------------------------------------------------12

4.1 DIP switch description------------------------------------------------------------------------------------------------------12

4.1.1 DIP switch location----------------------------------------------------------------------------------------------------------------------- 12

4.1.2 DIP switch description ------------------------------------------------------------------------------------------------------------------ 12

4.1.3 Default settings --------------------------------------------------------------------------------------------------------------------------- 18

Chapter 5 Basic Connection and Typical Application --------------------------------------19

5.1 Basic connection ------------------------------------------------------------------------------------------------------------19

5.1.1 Connect the optical interface---------------------------------------------------------------------------------------------------------- 19

5.1.2 Connect the E1 interface--------------------------------------------------------------------------------------------------------------- 20

5.1.3 Connect to the power supply---------------------------------------------------------------------------------------------------------- 20

5.2 Typical application-----------------------------------------------------------------------------------------------------------20

5.2.1 Point-to-point “internal clock – line-in clock” structure ---------------------------------------------------------------- ---------- 20

5.2.2 Point-to-point “V.35 terminal clock – line-in clock” structure------------------------------------------------------------------- 21

Chapter 6 Network Management Features------------------------------------------------------22

6.1 Network management platform------------------------------------------------------------------------------------------22

6.2 Network management query ---------------------------------------------------------------------------------------------22

6.3 Network management configuration------------------------------------------------------------------------------------22

Chapter 7 Device Installation Preparation and Connection-------------------------------23

7.1 Pre-installation checking and preparing-------------------------------------------------------------------------------23

7.1.1 Make sure that the E1 cable applied meet the requirement of the device------------------------------------------------- 23

7.1.2 Make sure that the fiber applied matches the optical transceiver of RC831-60-FV35---------------------------------- 23

7.1.3 Confirm the fiber cable type applied------------------------------------------------------------------------------------------------- 23

7.2 Installation procedures-----------------------------------------------------------------------------------------------------23

7.2.1 Device installation------------------------------------------------------------------------------------------------------------------------ 23

7.2.2 Cable connection------------------------------------------------------------------------------------------------------------------------- 23

7.2.3 Device electrifying ----------------------------------------------------------------------------------------------------------------------- 23

Appendix A Cable Making--------------------------------------------------------------------------------25

A.1 E1 cable making-------------------------------------------------------------------------------------------------------------25

Appendix B FAQ --------------------------------------------------------------------------------------------27

Release Notes

Date of Release Manual Version Revisions

20071114 200706 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

RC831-60-FV35 is a stand-alone single-optical-port PDH multiplexer independently developed by

Raisecom Technology Co., Ltd. RC831-60-FV35 is a fiber transmission device aiming at network

access market. It can multiplex at most 1 line of E1 data and 1 line of V.35 data up to 1 line of fiber

and realize remote network management at the same time.

1.2 Function Features

¾ Remote device manageable

In support of remote management while work in pair of modular multiplexer for SNMP
network management

¾ Indication for both local and remote site alarms
¾ Remote device power-off detection and alarm notification
¾ ALS function is supported to effectively control the output of optical signal in no connection

status

¾ 1 E1 interface working at 2048Kbps transparent transmission mode
¾ Local and remote E1 loopback testing function makes fault removal easier
¾ 1 M34 interface for the transmission of 1 line of V.35 data
¾ Local and remote V.35 loopback testing function makes line testing, device open and

maintenance convenient.

¾ The V.35 interface supports both framed E1 and unframed (transparent) E1 transmission

mode.
For V.35 interface working at framed mode, the bandwidth of the V.35 interface can be
configured to N x 64Kbps (N=1~31) by setting a succession of bits of the corresponding DIP
switch and the bandwidth can also be configured by assigning time slots in the network
management system.

¾ The V.35 interface provides 3 clock modes: internal clock (internal timing), line-in clock

(follows the E1 line timing), V.35 terminal clock (follows the V.35 interface timing).

¾ When the V.35 interfaces on both sides of the communication are working at framed E1 mode,

the timeslot configuration of the local device will automatically follow the configuration of
the remote device.

¾ The inbuilt bit error testing unit together with various loopback patterns completes line

diagnosis and testing.

¾ Power consumption < 10W, and stable and reliable operation is guaranteed.
¾ Adopt grand-scale ASIC chip

Low power consumption
4-layer circuit board design guarantees high reliability.

1.3 Ordering information

Device Model Description

RC831-60-FV35-M-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, multi-mode, transmission distance 0~2km,

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single power supply, 220V AC power supply.

RC831-60-FV35-S1-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, single-mode, transmission distance 0~25km,

single power supply, 220V AC power supply.

RC831-60-FV35-S2-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, single-mode, transmission distance 10~60km,

single power supply, 220V AC power supply.

RC831-60-FV35-S3-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, single-mode, transmission distance 15~120km,

single power supply, 220V AC power supply.

RC831-60-FV35-SS13-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1310nm, transmission distance 0~25km, single

power supply, 220V AC power supply.

RC831-60-FV35-SS15-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1550nm, transmission distance 0~25km, single

power supply, 220V AC power supply.

RC831-60-FV35-SS23-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1310nm, transmission distance 10~50km, single

power supply, 220V AC power supply.

RC831-60-FV35-SS25-AC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1550nm, transmission distance 10~50km, single

power supply, 220V AC power supply.

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RC831-60-FV35-M-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, multi-mode, transmission distance 0~2km,

single power supply, -48V DC power supply.

RC831-60-FV35-S1-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, single-mode, transmission distance 0~25km,

single power supply, -48V DC power supply.

RC831-60-FV35-S2-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, single-mode, transmission distance 10~60km,

single power supply, -48V DC power supply.

RC831-60-FV35-S3-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

dual-strand, single-mode, transmission distance 15~120km,

single power supply, -48V DC power supply.

RC831-60-FV35-SS13-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1310nm, transmission distance 0~25km, single

power supply, -48V DC power supply.

RC831-60-FV35-SS15-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1550nm, transmission distance 0~25km, single

power supply, -48V DC power supply.

RC831-60-FV35-SS23-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1310nm, transmission distance 10~50km, single

power supply, -48V DC power supply.

RC831-60-FV35-SS25-DC Stand-alone device, 1 line of V.35 signal, 1 line of E1 signal

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including both 75Ω unbalanced E1 interface (BNC) and

120Ω balanced E1 interface (RJ-45), 1 optical interface,

single-strand, two-wavelength, optical interface Tx

wavelength 1550nm, transmission distance 10~50km, single

power supply, -48V DC power supply.

LNote: Among RC831 series devices with optical transceivers for dual-strand fiber, the devices with same

optical transceivers can inter-connect with each other. For example, RC831-60-FV35-S1 can be inter-connected

with RC831-30-FV35-S1, RC831-240-BL-S1 and other RC831 series devices with S1 optical transceivers.

Among RC831 series devices adopting optical transceivers for single-strand fiber, device with SS13 can

communicate with device with SS15, while device with SS23 can communicate with device with SS25. For

example, RC831-60-FV35-SS13 can be inter-connected with RC831-60-FV35-SS15, RC831-30-FV35-SS15

and other RC831 series devices with SS15 optical transceivers.

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Chapter 2 Technical Specifications

2.1 Technical specifications of E1 interface

¾ Bit rate: 2048Kbps±50ppm
¾ Coding: HDB3
¾ Interface type: BNC, RJ-45
¾ Interface impedance: 75Ω unbalanced interface, 120 Ω balanced interface
¾ Physical characteristic: comply with ITU-T G.703 recommendations
¾ Transfer characteristic: comply with ITU-T G.823 recommendations
¾ Jitter tolerance: comply with ITU-T G.823 recommendations

2.2 Technical specifications of the optical interface

¾ Bit rate: 150Mbps
¾ Line coding: scrambled NRZ
¾ Interface type: SC interface (FC interface made to order)
¾ Optical transmission parameter: different optical transceivers have different optical interface

parameters, please see the table below.

Optical

transceiver

M 1310 -20 ~ -14 > -14 > 8.2 < -28 0 ~ 2

S1 1310 -15 ~ -8 > -8 > 8.2 < -34 0 ~ 25

S2 1310 -5 ~ 0 > -8 > 8.2 < -34 10 ~ 60

S3 1550 -5 ~ 0 > -10 > 10 < -36 15 ~ 120

SS13 1310 -12 ~ -3 > -8 > 8.2 < -30 0 ~ 25

SS15 1550 -12 ~ -3 > -8 > 8.2 < -30 0 ~ 25

SS23 1310 -5 ~ 0 > -8 > 8.2 < -32 10 ~ 50

SS25 1550 -5 ~ 0 > -8 > 8.2 < -32 10 ~ 50

Wavelength

(nm)

Transmitting Optical

Power (dBm)

Overload

(dBm)

Extinction

Ratio (dB)

Receiving

Sensibility (dBm)

Transmission

Distance (Km)

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 Power supply

AC power supply

¾ Voltage: 220V
¾ Allowance: 175 ~ 265V
¾ Frequency: 50Hz

or:

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¾ Voltage: 110V/230V
¾ Allowance: 85 ~ 265V
¾ Frequency: 50Hz/60Hz

DC power supply

¾ Voltage: -48V
¾ Allowance: -36 ~ -72V

OR:

¾ Voltage: +24V
¾ Allowance: +18 ~ +36V

Power consumption: < 10W

2.4 Operating environment

¾ Operating temperature: 0 ~ 60℃
¾ Operating humidity: ≤ 90% (25℃)

2.5 Storing environment

¾ Storing temperature: -40 ~ 80℃
¾ Storing humidity: 5% ~ 90%, no condensation

2.6 Outline and structure

¾ Physical outline: nonstandard stand-alone device
¾ Dimension: 38mm (Height) x 186mm (Width) x 142mm (Depth)
¾ Net Weight: 0.9 Kg

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Chapter 3 Device Appearance and Descripiton

3.1 Device front panel

3.2 Device rear panel

RC831-60-FV35 with AC power supply:

RC831-60-FV35 with DC power supply:

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3.3 Indicator definition

The indicators on the device front panel show the current working status of device power supply,

optical interface, and E1 interface. The definition of the indicators is described in the table below:

Number Indicator Color Description

Indicators for the power supply

1

2

Indicators for the V.35 interface

3

LPR

PWR

LOF

Red Remote device power-off indicator.

ON: both the local and remote devices are

operating normally when the remote system is

power off.

OFF: other status

Green Power supply indicator.

ON: the power supply is working normally.

Red V.35 interface data channel, loss of G.704

frame from fiber receiving signal alarm

indicator

ON: local E1 LOF alarm only

OR alarm occurs on both local and remote

site.

Flickering: remote E1 LOF alarm only

4

AIS

Red V.35 interface data channel, fiber receiving

signal AIS alarm indicator

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ON: local AIS alarm only

OR alarm occurs on both local and remote

site

Flickering: remote AIS alarm only

5

TD

Green V.35 interface TD signal indicator

Flickering: There is TD signal (transmission

data) data flow at the V.35 interface. The

frequency of the flicker depends on the bit rate

of the interface. When the rate is 64Kbps, the

flicker is the slowest. When the rate is

2048Kbps, the flicker is the fastest.

OFF: No TD signal (transmission data) data

flow at the V.35 interface.

6

RD

Green V.35 interface RD signal indicator.

Flickering: There is RD signal (receiving data)

data flow at the V.35 interface. The frequency

of the flicker depends on the rate of the V.35

interface. When the rate is 64Kbps, the flicker

is the slowest. When the rate is 2048Kbps, the

flicker is the fastest.

OFF: No RD signal (receiving data) data flow

at the V.35 interface.

Indicators for the testing function

7

8

PAT

LOOP

Yellow Bit error testing indicator.

Yellow V.35 interface loopback status indicator

Indicators for the optical interface

ON: received the pattern sent by the bit error

testing unit and the line is normal without error

bit.

Turn OFF for at least 1s: received the pattern

sent by the bit error testing unit, but error bit

has been spotted on the line.

OFF: The bit error testing function is disabled.

ON: V.35 interface local loopback
Flickering: V.35 interface remote loopback
OFF: no loopback at the V.35 interface

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14

15

17

18

LOF

LOS

E-3

E-6

Red ON: local optical interface receiving signal

Loss of Frame (LOF) alarm

Flickering: remote optical interface receiving

signal LOF alarm

Red ON: local optical interface loss of receiving

signal alarm

Flicking: remote optical interface loss of

receiving signal alarm

Red ON: the BER of local optical interface

receiving signal exceeds 1E-3

Flickering: the BER of remote optical interface

receiving signal exceeds 1E-3

Yellow ON: the BER of local optical interface

receiving signal exceeds 1E-6

Flickering: the BER of remote optical interface

receiving signal exceeds 1E-6

Indicators for the E1 interface

19

3.4 Interface description

There is an optical interface and an E1 interface on the front panel of the device. The interfaces are

described in the table below:

Number Interface Interface

16 Optical

LOS

interface

Red E1 interface loss of receiving signal alarm

indicator

ON: local E1 LOS alarm
Flickering: remote E1 LOS alarm
OFF: no LOS alarm at both local and remote

E1

Description

Type

SC Local Fiber interface

20-22 E1

interface

BNC and

RJ-45

Local E1 interface.

Both 75Ω unbalanced E1 interface

(BNC) and 120Ω balanced E1 interface

(RJ-45) are provided.

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One V.35 interface is located on the rear panel of the device. It is described in the table below:

Interface Interface Type Description

V.35 interface M34 Local V.35 interface.

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Chapter 4 Device Settings

4.1 DIP switch description

4.1.1 DIP switch location

1234 8765

4.1.2 DIP switch description

6 8-bit DIP switches and 1 4-bit DIP switch locate on the bottom of the device. They are named SW1,

SW2, SW3, SW4, SW5, SW6, SW7, and their locations are shown in the figure above. For SW1~6,

the 8 bits from the left to the right are bit 1~8; for SW7, the 4 bits from the left to the right are bit

1~4. When a bit of the switch is turned to the lower side, it means that the bit is turned OFF. When a

bit of the switch is turned to the upper side, it means that the bit is turned ON.

SW1 SW4

DIPON

DIPON

1234 8765

1234 8765

SW3SW2

DIPON

1234 8765

The bottom view of the device

SW7

ON

DIP

SW5 SW6

DIPON

1234 8765

DIPON

DIPON

1234 8765

12 34

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4.1.2.1 Timeslot configuration DIP switch SW1~4

In the tables below, “√” indicate Enable; “×” indicates Disable.

SW1 definition (default all OFF)

Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8

Definition V.35 Channel

Transmi t

Mode

ON

OFF

SW2 definition (default all OFF)

Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8

Definition TS 8 TS 9 TS 10 TS 11 TS 12 TS 13 TS 14 TS 15

ON

OFF

SW3 definition (default all OFF)

Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8

Framed

Unframed

√ √ √ √ √ √ √ √

× × × × × × × ×

TS 1 TS 2 TS 3 TS 4 TS 5 TS 6 TS 7

√ √ √ √ √ √ √

× × × × × × ×

Definition TS 16 TS 17 TS 18 TS 19 TS 20 TS 21 TS 22 TS 23

ON

OFF

SW4 definition (default all OFF)

Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8

Definition TS24 TS25 TS26 TS27 TS28 TS29 TS30 TS31

ON

OFF

√ √ √ √ √ √ √ √

× × × × × × × ×

√ √ √ √ √ √ √ √

× × × × × × × ×

LNote:

1. If the SW1-1 is set to be unframed mode, then the switches for TS1 ~ TS31 are inapplicable.

2. If the SW1-1 is set to be framed mode, then the switches for TS1 ~ TS31 are not allowed to be OFF at

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the same time. Only when at least 1 timeslot is enabled, will the framing be realized.

4.1.2.2 Function setting switch SW5

In the tables below, “√” indicate Enable; “×” indicates Disable.

SW5 definition:

Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8

Definition

ON

OFF

Timing1 Timing2 TS_FLOW

Timeslot follow

* *

* *

√ √

× ×

BERT

Bit error

testing

RX CLK phase Fault pass-through Local or Remote

loopback setting

Negative

Positive

√

×

E1 local loopback

E1 remote NO loopback

¾ Bit 1~2: clock mode selection switch Timing 1 and Timing 2 (default both ON)

The operation manner of the clock of the device is decided by bit1 and bit2 of SW5, the definition is

shown in the table below:

Bit 1 Bit 2 Clock Mode

OFF OFF Internal clock (internal timing)

OFF ON

V.35 terminal clock (timing follows the V.35 interface)

ON OFF

Enable or

disable

loopback

ON ON Line-in clock (timing follows E1 line)

¾ Bit 3: timeslot auto-following function switch TS_FLOW(default OFF)

Bit 3 Timeslot auto-following function

ON Enable

OFF Disable

The following requirements must be satisfied before having the local timeslot setting follow the

remote timeslot setting.

1) The devices of this series are applied in pair and they are deployed point to point.

2) There is no PCM equipment that occupies the Sa4 bit series connecting in the E1 link

3) The local device must be set to be working with line-in clock mode.

After the above requirements being satisfied, please turn ON the switch for timeslot auto-following

function of the local device to enable the auto-following function. Then, the timeslot occupation and

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framing mode (PCM30/PCM31) setting of the local device will automatically follow the setting of

the remote device.

¾ Bit 4: bit error testing enable/disable switch BERT (default OFF)

Bit 4 BERT

ON Enable the inbuilt bit error testing function

OFF Disable the inbuilt bit error testing function

There is an inbuilt bit error testing unit in the device. Its main function is to generate a pattern in the

format of 2E15-1-Std and send it to the first E1 line side in fiber (actually V.35 data channel).

Loading the generated pattern to suitable data channel, together with different loopback mode, the

pattern will be return to the device that generated it for testing. The result of the testing will be

shown by the PAT indicator on the front panel. When bit error is detected, the PAT indicator will turn

OFF for at lease 1s, and turn back to yellow if there is no new bit error has been detected.

When the bit error testing function is enabled, the testing sequence will be inserted into the data

channel of the user. The function is applicable in both framed mode and unframed (transparent)

mode. When using this function, the V.35 service will stop.

LNote: Together with different loopback mode, the bit error testing function completes loopback testing.

When the local bidirectional loopback function is disabled, users can use patch cord to simulate local loopback.

However, this method does not apply to devices with single-strand optical transceivers or dual-strand S3 optical

transceivers. When conducting the loopback testing, the indicator PAT turning yellow means that the received

testing pattern is correct. If the loopback mode is set to be remote bidirectional loopback, the whole process that

the signal goes through the network will be tested.

¾ Bit 5: RX CLK phase selection switch (default OFF)

Bit 5 RX CLK

ON RX CLK phase negative

OFF RX CLK phase positive

The RX CLK phase selection switch is designed for adjusting the difference in the phase relationship

between V.35 interface clock and data of routers from different manufacturers. When setting the RX

CLK to OFF, the device is able to pass the testing at the V.35 synchronizing WAN interface of Cisco

series routers.

RX CLK positive: data is sent to RD signal at the falling edge of the RX CLK clock signal

RX CLK

RD

RX CLK negative: data is sent to RD signal at the rising edge of the RX CLK clock signal.

RX CLK

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RD

LNote: The phase relation of the TX CLK signal and TD signal of this device is self-adjusted. There is no

need for user setting.

¾ Bit 6: fault pass-through function switch (default OFF)

Bit 6 Fault pass-through function

ON Enable

OFF Disable

When the fault pass-through function is enabled, the device will pass the information of optical

receiving side alarm and E1 transmitting side alarm to the DCD and CTS signal of the V.35 interface,

namely, the fiber optical receiving side alarm will have the DCD signal of the V.35 interface shut

down and the optical transmitting side alarm will lead to the shutdown of CTS signal of the V.35

interface. When the fault pass-through function is disabled, the DCD signal and CTS signal of the

V.35 interface will be effective signal.

When the fault pass-through function is enabled, local alarm of the multiplexer indicates that fault

occurs on the receiving side of fiber optic. As a result, the DCD signal of the V.35 interface will be

shut down and the DTE device will react accordingly.

When the fault pass-through function is enabled, remote alarm of the multiplexer indicates that fault

occurs on the transmitting side of fiber optic. Consequently, the CTS signal of the V.35 interface will

be shut down, and the DTE device will react accordingly.

The DSR signal of the device will always be effective signal after device electrifying.

¾ Bit 7~8: Loopback switch (default OFF)

SW5 Bit 7 Bit 8

ON Local loopback Loopback enable

OFF Remote loopback Loopback disable

The Bit 7 of the function setting DIP switch SW5 is for setting the point for loopback, that is, for

setting the loopback to “remote loopback” or “local loopback”. The loopback setting is effective on

both E1 line and V.35 line. The loopback of RCMS2801 series devices have two directions. The

following two figures show the loopback point and loopback direction of remote loopback and local

loopback.

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BER Tester

E1

Sid

e

Multiplexing Core

Multiplexing Core

Interface Circuit

Set up the “remote loopback” on the local PDH multiplexer

Fiber

Local

Set up the “local loopback” on the local PDH multiplexer

Remot

Interface Circuit

Sid

E1

e

LNote:

1. When setting up remote loopback testing, please make sure that there is no alarm at the optical interface in

advance.

2. When setting up any loopback at the local multi-service multiplexer, please ensure that all E1-LOOP

loopback control switches on the opposite device are OFF.

4.1.2.3 Function setting switch SW6

Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8

Definition

ON

OFF

Reserved

4.1.2.4 E1 type selection switch SW7

Optical interface

ALS

Enable

Disable

reserved switch

Please keep the factory settings!

Definition Bit 1 Bit 2 Bit 3 Bit 4

75Ω

120Ω

ON ON ON OFF

OFF OFF OFF ON

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4.1.3 Default settings

The default status of the Bit 1 and Bit 2 of SW5 is ON. The settings of Bit 5~8 of SW6 follow the

rule in the table below according the optical transceivers the device applies. The factory setting for

the bits of SW7 is ON, ON, ON, OFF, that is, the E1 interface is a 75Ω unbalanced interface. The

default status of all other switches is OFF.

SW6-5 SW6-6 SW6-7 SW6-8 Optical transceiver

ON ON ON ON M (1310 Tx and Rx)

ON ON ON OFF S1 (1310 Tx and Rx)

ON ON OFF ON S2 (1310 Tx and Rx)

ON ON OFF OFF S3 (1550 Tx and Rx)

ON OFF ON ON SS13 (1310 Tx, 1550 Rx)

ON OFF ON OFF SS15 (1550 Tx, 1310 Rx)

ON OFF OFF ON SS23 (1310 Tx, 1550 Rx)

ON OFF OFF OFF SS25 (1550 Tx, 1310 Rx)

The meaning of the default settings:

The device works in transparent mode and follows line-in clock. The timeslot auto-following

function, bit error testing function and all loopback testing function are disabled on the device. The

RX CLK phase of the V.35 interface is positive. The E1 interface is 75Ω unbalanced interface.

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Chapter 5 Basic Connection and Typical Application

5.1 Basic connection

5.1.1 Connect the optical interface

Insert the well-prepared fiber patch cord into the optical interface on the front panel of the device.

For device adopting optical transceivers M, S1, S2 or S3, the optical interface connection pattern is

shown in the figure below. On the device panel, “TX” indicates output optical signal, while “RX”

indicates input optical signal.

Optical interface connecting - 1

For device adopting optical transceiver SS13, SS15, SS23 or SS25, the optical interface connection

manner is shown in the figure below. In this circumstance, the optical interface will receive as well

as transmit signals. “TX” and “RX” on the device panel have no meaning. For details, please refer to

the ordering information in section 1.3.

Optical interface connecting – 2

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LNote: Only inter-connection of optical transceiver SS13 and SS15 and inter-connection of optical

transceiver SS23 and SS25 are allowed. Same type of optical transceivers can not communicate.

If the connection is correct, and there is receiving optical signal, the LOS alarm indicator on the front

panel of the device will turn OFF after the device being electrified.

5.1.2 Connect the E1 interface

RC831-60-FV35 adopts twisted pair with RJ-45 connector to connect the 120Ω balanced E1interface

on the device. For the pin arrangement of the RJ-45 connector and relevant cable making method,

please refer to Appendix A.

RC831-60-FV35 adopts coaxial cable with BNC connector to connect the 75Ω unbalanced interface.

For the method of making BNC cable, please refer to Appendix A.

5.1.3 Connect to the power supply

For device adopting 220V AC power supply, please plug the provided 220V AC power supply cable

to a 220V standard 3-phase power supply socket. For device adopting -48V DC power supply, please

connect the device with DC power supply using -48V DC power supply (connect the BGND

terminal of the DC power supply interface of the device to the 0V ground of the power supply,

connect the -48V terminal to the -48V power supply, and connect the PGND terminal to protection

earth). For device using +24V DC power supply, the connecting is similar to that of the -48V DC

power supply.

5.2 Typical application

The network topologies provided in this section are only for user’s reference. Users should design

their own topologies according to their factual need.

5.2.1 Point-to-point “internal clock – line-in clock” structure

When RC831-60-FV35 is connecting with a router or another device with V.35 interface in a

point-to-point topology, the router must be working in the DTE mode. For the convenience of

installation and debug, users can set the local PDH multiplexer with V.35 interface to internal clock

mode, and set the remote PDH multiplexer with V.35 interface to line-in clock mode, that is, the

clock source is on the local device with V.35 interface.

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5.2.2 Point-to-point “V.35 terminal clock – line-in clock” structure

When the remote DTE device following the clock of local DTE device, that is, the TX CLOCK of

local DTE serves as the internal clock source, users can set the clock of local PDH multiplexer with

V.35 device to V.35 terminal clock mode and set the clock of remote PDH multiplexer with V.35

interface to line-in clock mode.

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Chapter 6 Network Management Features

6.1 Network management platform

RC831-60-FV35 can only be used as remote site device and be managed on the network

management platform NView NNM V5.0 developed by Raisecom. Through the network

management platform, users can view the status information of RC831-60-FV35, and control and

configure it.

6.2 Network management query

The indicator status of remote RC831-60-FV35 can be viewed on the network management platform.

Also, the current configuration status and alarm information of E1 service and V.35 service can be

queried on the network management system.

6.3 Network management configuration

When the RC831-60-FV35 is a remote device, the status of all functions set by DIP switches except

for the E1 type switch is modifiable on the network management platform.

L

Note: The latest configuring operation, whether it is completed by the network management

system or a DIP switch, will always take effect.

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Chapter 7 Device Installation Preparation and Connection

7.1 Pre-installation checking and preparing

Firstly, please check the model and the number of the device and spare parts according to 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.

Please read this manual with caution before installing the device; please have all types of cables that

are needed ready and make sure there are no short circuits and open circuits; please make sure that

the power supply of the chassis works in the operating voltage range; please have the rack of the

chassis device well earthed; please prepare BER tester, optical power meter for line quality testing.

7.1.1 Make sure that the E1 cable applied meet the requirement of the device

If the E1 line to which the RC831-60-FV35 will connect to is composed of PDH and SDH devices,

please refer to the user manual of the corresponding device for parameters like E1 interface type,

definition and impedance.

7.1.2 Make sure that the fiber applied matches the optical transceiver of RC831-60-FV35

For RC831-60-FV35-M, please use multi-mode fiber with SC/PC connector.

For RC831-60-FV35-S1/S2/S3, please use single-mode fiber with SC/PC connector.

For RC831-60-FV35-SS13/SS15/SS23/SS25, please use single-mode fiber with SC/PC connector.

7.1.3 Confirm the fiber cable type applied

The cable type for the interface of multi-mode fiber:

62.5/125um multi-mode fiber or 50/125um multi-mode fiber

The cable type for the interface of single-mode fiber:

9/125um single-mode fiber

7.2 Installation procedures

7.2.1 Device installation

Please fix the device firmly.

7.2.2 Cable connection

Please connect the cables in need according to factual situation. For details, please refer to Chapter 5

for “Basic Connection and Typical Application”.

7.2.3 Device electrifying

Hot-plugging of the cable connecting to the V.35 interface is strictly forbidden.

For device adopts -48V DC power supply, please connect the device to the protection earth first, that

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is, connect the terminal in the middle of the DC power supply interface to the protection earth at first.

Before electrifying, please connect the “-48V” terminal with cable of lower electrical potential and

connect the “BGND” terminal with cable of higher electrical potential.

Please tighten the connection, and then turn on the power supply. The power supply status indicator

PWR (Green) on the front panel of the device will turn ON to show that the power supply is working

normally.

The device will begin to initialize and self-check after electrifying. The process will take no more

than 10 seconds. During the initialization and self-checking, the optical interface status indicator

LOF and E-6 may flicker for one time, which is a normal phenomenon. The system will begin its

normal operation after 10 seconds.

During normal operation, if the optical interface is correctly connected, there will be no LOS, LOF,

E-3, and E-6 alarms.

When devices on both ends are electrified with no connection to the V.35 interfaces, when the

devices are working in the unframed mode, the indicator AIS may turn ON, which is a normal

phenomenon. In this circumstance, the flickering of indictors TD and RD is normal too.

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Appendix A Cable Making

A.1 E1 cable making

For 75Ω BNC interface:

The application of coaxial cable of model SYV75-5, SYV75-3 or SYV75-2-2 is recommended.

Please keep the maximal length of the cable within 200 meters.

Take out the BNC connector from the appendix pack of the device, and screw off the protection

cover. Part the core and the shield of the coaxial cable, and set the protection cover on to the cable.

Weld the core of the cable and the core of the BNC connector and weld the shield of the cable and

that of the BNC connector. Fix the protection cover at the rear of the connector firmly.

TX – output signal

RX – input signal

120Ω RJ-45 interface:

Pin

Number

Please use CAT-5 twisted pair cable with RJ-45 connector to connect to the device. For the figure of

the RJ-45 connector and its pin arrangement, please see Figure A-1 and Table A-1.

Figure A-1 The pin arrangement of RJ-45 crystal connector (top view)

Table A-1 RJ-45 connector pin arrangement for E1 cable

1 2 3 4 5 6 7 8

Definition

OUT+ OUT- NC IN+ IN- NC NC NC

OUT+ — output positive signal of device

OUT- — output negative signal of device

IN+ — input positive signal of device

IN- — input negative signal of device

NC — no connection

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L

Note: When making cables, please adopt shielded cable in preference to meet the

electromagnetic compatibility requirements.

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Appendix B FAQ

For some problems you may meet during installation and operation, please try to solve them

following the suggestions below. For the problems can not be solved using the following suggestions,

please contact with distributors for technical support.

¾ The power supply indicator PWR (green) wouldn’t turn ON.

Please check whether the power supply cable of the device is well connected and whether the
power supply switch has been turned on.

¾ The optical interface LOS indicator (red) turns ON.

This indicates that loss of receiving signal (LOS) alarm occurs at the optical interface.

Firstly, please check whether the fiber is well connected to the optical interface.

Secondly, please form a self loop using the fiber (may need attenuation). If the alarm still

exists, please replace the fiber and again form a self loop using the new fiber. If the optical
interface LOS indicator is still ON, there is problem with the device.

¾ The optical interface LOF indicator (red) turns ON.

Loss of frame alarm of the receiving signal at the optical interface occurs. Optical signal has
been received, but the optical power may be around the critical receiving sensitivity. Please
measure the receiving optical power and make sure that the TX interface of the optical
interface of the remote device has been well connected.

¾ Optical interface indicator E-3 (red) turns ON.

The bit error rate of the receiving signal at the optical interface exceeds 1E-3. Please check
whether the optical interface has been well connected and please measure the receiving
optical power as well.

¾ Optical interface indicator E-6 (yellow) turns ON.

The bit error rate of the receiving signal at the optical interface exceeds 1E-6. The E-6 alarm
may occur when the device is just electrified. This is a normal phenomenon and will last at
most 10 seconds before the E-6 indicator turns OFF. If the E-6 alarm occurs during the
normal operation of the device, please check whether the optical interface is well connected
and please measure the optical power.

¾ V.35 interface indicator AIS (red) turns ON.

When the device is working in unframed (transparent) mode, if the optical interface received
AIS signal, the indicator (red) will turn ON. If there is no break-off on the line, the cause of
the alarm may come from the following problems: maybe there is no router being connected
to the V.35 interface of the remote device; the remote router may power off; the V.35
interface of the remote router may be shut down. When working together with routers from
some manufacturers, since the V.35 interface of the remote router may mistakenly send out
AIS signal when it is in idle status, the situation that the indicator turns ON or flicker but the
communication is not affected may occurs. As the circumstance will not affect the
communication, please consider and accept it as a normal phenomenon.

¾ The V.35 interface suffers severe packet loss.

The possible causes are:

The clock setting is incorrect, which causes that the network is not working following one

clock.

Please check the V.35 interface status of the router. If there is any input or output data error,

the phase relationship of the RX CLK of the local or remote device may need adjustment.

¾ The E1 interface LOS (red) indicator turns ON.

E1 LOS alarm indicates lost of receiving signals at the E1 interface. There is no HDB3 code
input.

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Please check whether the E1 cable has been connected properly, and whether the TX and RX

of the BNC cable are correctly connected.

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