Raisecom RC852-30-FV35 User Manual

www.raisecom.com

RC852-30-FV35 User Manual

REV.A
200603

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following methods:

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nd

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

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CONTENTS

Chapter 1 System Overview ------------------------------------------------------------------------------- 7

Overview------------------------------------------------------------------------------------------------------------------------------7
Function feature --------------------------------------------------------------------------------------------------------------------7
Ordering Information and Interconnecting -----------------------------------------------------------------------------------7

Chapter 2 Parameters-------------------------------------------------------------------------------------- 10

V.35 Interface Specification ----------------------------------------------------------------------------------------------------10
Optical Fiber Interface Specification----------------------------------------------------------------------------------------- 10
Accessory Cables ----------------------------------------------------------------------------------------------------------------10
Characteristic---------------------------------------------------------------------------------------------------------------------- 11

Chapter 3 Construction & Indicator ------------------------------------------------------------------- 12

Front Panel------------------------------------------------------------------------------------------------------------------------- 12
DIP Switches ----------------------------------------------------------------------------------------------------------------------14
Relationship between DIP-switch and software configuration -------------------------------------------------------- 18
Typical Application ---------------------------------------------------------------------------------------------------------------18

Chapter 4 Installation and Test-------------------------------------------------------------------------- 20

Inspecting the Product ----------------------------------------------------------------------------------------------------------20
Preparation before Installation ------------------------------------------------------------------------------------------------ 20
Installation-------------------------------------------------------------------------------------------------------------------------- 20

Chapter 5 Troubleshooting------------------------------------------------------------------------------- 21
Appendix A: Introduction of Cable Making--------------------------------------------------------------- 22

1. CBL-V35-HDB26M/M34F Cable making Instruction --------------------------------------------------------------22

2. CBL-V35-HDB26M/M34M-X Cable making Instruction ---------------------------------------------------------- 22

Preface

About This Manual

This manual introduces primary functions of the configuration management software for RC
series products.

Who Should Read This Manual

Sales and marketing engineers, after service staff and telecommunication network design
engineers could use this manual as a valuable reference. If you want to get an overview on
features, applications, architectures and specifications of Raisecom RC series integrated
access devices, you could find useful information in this manual as well.

Compliance

The RC series products developed by Raisecom are strictly complied with the following
standards as well as ITU-T, IEEE, IETF and related standards from other international
telecommunication standard organizations:

YD/T900-1997 SDH Equipment Technical Requirements - Clock

YD/T973-1998 SDH 155Mb/s and 622Mb/s Technical conditions of optical transmitter
module and receiver module

YD/T1017-1999 Network node interface for the Synchronous Digital Hierarchy (SDH)

YD/T1022-1999 Requirement of synchronous digital hierarchy (SDH) equipment function

YD/T1078-2000 SDH Transmission Network Technique Requirements-Interworking of
Network Protection Architectures

YD/ T1111. 1-2001 Technical Requirements of SDH Optical Transmitter/Optical Receiver
Modules——2.488320 Gb/s Optical Receiver Modules

YD/ T1111. 2- 2001 Technical Requirements of SHD Optical Transmitter/Optical Receiver
Modules——2.488320 Gb/s Optical Transmitter Modules

YD/T1179- 2002 Technical Specification of Ethernet over SDH

G.703 Physical/electrical characteristics of hierarchical digital interfaces

G.704 Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s
hierarchical levels

G.707 Network node interface for the synchronous digital hierarchy (SDH)

G.774 Synchronous digital hierarchy (SDH) - Management information model for the network
element view

G.781 Synchronization layer functions

G.783 Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks

G.784 Synchronous digital hierarchy (SDH) management

G.803 Architecture of transport networks based on the synchronous digital hierarchy (SDH)

G.813 Timing characteristics of SDH equipment slave clocks (SEC)

G.823 The control of jitter and wander within digital networks which are based on the 2048
kbit/s hierarchy

G.825 The control of jitter and wander within digital networks which are based on the
synchronous digital hierarchy (SDH)

G.826 End-to-end error performance parameters and objectives for international, constant
bit-rate digital paths and connections

G.828 Error performance parameters and objectives for international, constant bit-rate
synchronous digital paths

G.829 Error performance events for SDH multiplex and regenerator sections

G.831 Management capabilities of transport networks based on the synchronous digital
hierarchy (SDH)

G.841 Types and characteristics of SDH network protection architectures

G.842 Interworking of SDH network protection architectures

G.957 Optical interfaces for equipments and systems relating to the synchronous digital
hierarchy

G.691 Optical interfaces for single channel STM-64 and other SDH systems with optical
amplifiers

G.664 Optical safety procedures and requirements for optical transport systems

I.731 ATM Types and general characteristics of ATM equipment

I.732 ATM Functional characteristics of ATM equipment

IEEE 802.1Q Virtual Local Area Networks (LANs)

IEEE 802.1p Traffic Class Expediting and Dynamic Multicast Filtering

IEEE 802.3 CSMA/CD Access Method and Physical Layer Instruction

- 7 -

Chapter 1 System Overview

This section includes:

 Overview
 Function Feature
 Ordering Information and Introduction of working in pair

Overview

RC852-30-FV35 series optical modular multiplexers are fiber optical modem to transmit single v.35
signal over fiber. In the remote Customer Premier Equipment’s side, this module could be installed
into Raisecom single slot chassis. It also could work in pair with RC852-30 or RC852-30-BL (E1 to
fiber modem), to adapt more application that customer require. It can be inserted into Raisecom’s
19 inch rack mounting 16-slot or 4-slot chassis which can also accommodate other Raisecom
series products to enable uniform SNMP network management in Central Office. This module is
compact in size and highly integrated with versatile capabilities.

Function feature

¾ Service interface: one V.35 DCE interface completed with ITU recommendation
¾ Line interface: one fiber optical interface of dual-strand fiber or single-strand bi-direction

fiber

¾ Complies with G.704 frame definition, realize bandwidth control on V.35 interface
¾ Whole fiber line alarms and internal E1 frame detection alarms, local and remote alarm

indication simultaneously

¾ Local and remote loop-back of interfaces
¾ Transparently transmit fractional E1 or unframed E1 in fiber optical signal
¾ Three clock mode: master clock (internal clock timing), slave clock (fiber line input timing),

V.35 terminal clock (V.35 interface input timing).

¾ If fractional mode on both site, the remote unit’s timeslot configuration could auto-following

local unit’s

¾ Build-in bit error tester for monitor line quality.
¾ In fractional mode, the PCM30/PCM31 are optional and CRC4 is auto-negotiation
¾ Phase adjustment of V.35 receiving data and clock
¾ Fault propagation could transfer fiber line alarms to V.35 interface shutdown.
¾ Local and remote network manageable
¾ Modular design for adaptability of Raisecom RC002-16 Modem Pool

Ordering Information and Interconnecting

Part Number Description

RC852-30-FV35-S1

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port ( dual-strand, SC/PC, single mode, 0~25Km)

RC852-30-FV35-S2

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port ( dual-strand, SC/PC, single mode, 10~60Km)

- 8 -

RC852-30-FV35-S3

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port ( dual-strand, SC/PC, single mode, 15~120Km)

RC852-30-FV35-SS13

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port (single-strand, TX1310nm/RX1550nm, SC/PC, single

mode, 0~25Km)

RC852-30-FV35-SS15

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port (single-strand, TX1550nm/RX1310nm, SC/PC, single

mode, 0~25Km)

RC852-30-FV35-SS23

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port (single-strand, TX1310nm/RX1550nm, SC/PC, single

mode, 10~50Km)

RC852-30-FV35-SS25

Module, V.35 to fiber optical modem, one V.35 DCE port (HDB26 female

connector), one fiber port (single-strand, TX1550nm/RX1310nm, SC/PC, single

mode, 10~50Km)

When connecting with other fiber optical modem, it is required to comply with the specific connecting requirements
according to the following table. Otherwise, link faults or abnormal data transmission will occur.

Host site Remote Site

*RC852-30-FV35-S1

RC852-30-FV35-S1

*RC851-30-FV35-S1

*RC852-30-FV35-S2

RC852-30-FV35-S2

*RC851-30-FV35-S2

RC852-30(-BL)-S3

*RC852-FV35-30-S3

RC852-30(-BL)-S3

*RC851-FV35-30-S3

RC852-30(-BL)-SS15

*RC852-30-FV35-SS15

RC852-30(-BL)-SS13

*RC851-30-FV35-SS15

RC852-30(-BL)-SS13

*RC852-30-FV35-SS13

RC852-30(-BL)-SS15

*RC851-30-FV35-SS13

RC852-30(-BL)-SS25

*RC852-30-FV35-SS25

RC852-30(-BL)-SS23

*RC851-30-FV35-SS25

- 9 -

RC852-30(-BL)-SS23

*RC852-30-FV35-SS23

RC852-30(-BL)-SS25

*RC851-30-FV35-SS23

*Attention:

When the customer’s application is RC852-30(-BL) and RC852-30-FV35 (or RC851-30-FV35) work in pair, if
RC852-30-FV35 (or RC851-30-FV35) be in N*64kbps (N<=31) fractional mode, the RC852-30(-BL) should be also in
fractional E1 mode for connective success.

- 10 -

Chapter 2 Parameters

This section contains the following information:

 V.35 interface Specification
 Optical Fiber Interface Specification
 Accessory Cables
 Characteristic

V.35 Interface Specification

Electrical characteristics: complies with ITU-T V.35
Connecter: HDB26 female connector, through an adapt cable to ISO2593

connecter

Working mode: DCE (could also connect other DCE by cross connected

cable)
Bit rate: In E1 framed mode, V.35 bandwidth is N*64Kbps (N=1~31)
In E1 unframed mode, V.35 bandwidth is 2048Kbps

Optical Fiber Interface Specification

Bit rate: 4Mbps
Line code: disturbed NRZ (Private)
Fiber connecter: SC

Optical Interface

Model

Type

Working

wavelength

nm

Launch power

dBmW

Receiving
sensitivity

dBmW

Receiving
saturation

dBmW

Distance

(Km)

Optical loss

dB/Km

-M DSC 1310 -18 ~ -14 -31 -14 0 ~ 2 3

-S1 DSC 1310 -15 ~ -8 -31 -8 0 ~ 25 0.5

-S2 DSC 1310 -5 ~ -0 -35 -3 10 ~ 60 0.5

-S3 DSC 1550/DFB -5 ~ -0 -35 -3 15 ~ 120 0.25

-SS13 SC 1310/1550 -15 ~ -8 -31 -8 0 ~ 25 0.5

-SS15 SC 1550/1310 -11 ~ -5 -31 -5 0 ~ 25 0.5

-SS23 SC 1310/1550 -5 ~ 0 -35 -3 10 ~ 60 0.5

-SS25 SC 1550/1310 -5 ~ 0 -35 -3 10 ~ 60 0.5

Accessory Cables

When connect this series product with DTE equipments such as routers through HDB26 interface, please use
CBL-V35-HDB26M/M34F cable provided by Raisecom (standard accessory) to work with DTE/routers cable.
When the CBL-V35-HDB26M/M34F cable is not long enough, please order it from Raisecom.

When connect this series product with other venders DTE equipments, the cross cable
CBL-V35-HDB26M/M34M-X is necessary, and please order it from Raisecom (non standard accessory). The
default length of this cable is 2 meters.

- 11 -

Characteristic

Dimension 91mm x 25mm x 178mm

Working Temperature (℃)

(0, 45)

Storing Temperature (℃)

(-40, 80)

Consumption(W) 3W

Humidity 5%~9% ( no condensation)

- 12 -

Chapter 3 Construction & Indicator

This section contains the following information:

 Front Panel
 DIP Switches
 Relationship between DIP-switch and software configuration
 Typical Application

Front Panel

RC852-30 front panel

z Power:

PWR (Green):

Green, means device power supply works normal;

PAT (Yellow):

Yellow, means no error on bit error pattern test mode. If the fiber optic interface receives its own
sending test pattern 2E15-1, the indicator will be in steady yellow. When it gets an error code the
indicator will turns off for at least 1 second.

z Fiber optical interface Alarm indicator:

LOS (Red):

Red on: Loss of signal (LOS) alarm of local fiber receiving;

Red blink: Loss of signal (LOS) alarm of remote fiber receiving;

Off: got input signal both on local and remote receive directions.

LOF (Red):

Red on: Loss of frame (LOF) alarm of local fiber receiving;

Red blink: Loss of frame (LOF) alarm of remote fiber receiving;

Off: got input frame both on local and remote receive directions.

ERR (Red):

Red on: Bit error more than 1E-3 or 1E-6 on fiber monitoring of local fiber receiving;

Red blink: Bit error more than 1E-3 or 1E-6 on fiber monitoring of remote fiber receiving;

- 13 -

Off, got no error both on local and remote receive directions.

Attention:

Alarm priority level: Highest -- LOS > LOF> ERR – Lowest

z Alarm indicator of E1 channel in fiber trunk

AIS (Red):

Red on: Alarm Indication Signal (AIS) alarm of local fiber receiving;

Red blink: Alarm Indication Signal (AIS) alarm of remote fiber receiving;

Off, no AIS both on dual direction

LOF (Red):

Red on: Loss of G.704 frame alarm of local fiber receiving;

Red blink: Loss of G.704 frame alarm of remote fiber receiving;

Off, no LOF both on dual direction

CRC (Red):

Red on: CRC4 error alarm of local fiber receiving;

Red blink: CRC4 error alarm of remote fiber receiving;

Off, no LOF both on dual direction

z Fiber optical interface:

Single fiber optical port supports dual-strand fiber (S1 / S2 / S3) or single-strand fiber (SS13 / SS15 /

SS23 / SS25).

For dual-strand fiber interface, TX means output (transmit), RX means input (receive);

For single-strand fiber interface, TX and RX symbols means nothing, there are two separate

wavelengths in the single-strand fiber to carry out bi-direction transmitting.

z V.35 interface:

This left figure is HDB26 connector, and it can connect to ISO2593 connector by
cable provided by Raisecom.

This left figure is ISO2593 connector of standard V.35 interface.
The connector used for this series device is DCE Connector Face – 34
Pin Female which can be connected to standard DTE cable.
The description of this interface is as below table:

- 14 -

I-Input; O-Output

Signal Name In/Out Pin Number
Chassis Ground — CGND - A
Signal Ground — GND - B
Receive Data (A) — RD(A) O R
Receive Data (B) — RD(B) O T
Receive Timing (A) — RCK(A) O V
Receive Timing (B) — RCK(B) O X
Send Data (A) — TD(A) I P
Send Data (B) — TD(B) I S
Send Timing (A) — TCK(A) O Y
Send Timing (B) — TCK(B) O AA
Terminal Timing (A) — SCTE(A) I U
Terminal Timing (B) — SCTE(B) I W
Request to Send — RTS I C
Clear to Send — CTS O D
Data Set Ready — DSR O E
Data Carrier Detect — DCD O F
Data Terminal Ready — DTR I H

DIP Switches

There are 6 group 8-bits dip-switches on the top layer of the printed-circuit board,
named SW1, SW2, SW3, SW4, SW5 and SW6. Each DIP-switch is shown as the
left figure. From left to right is the 1st bit to 8th bit. UP indicates ON, and DOWN
indicates OFF. Please configure these DIP-switches before installing the device to
chassis.

RC852-30-FV35 top layer of PCB

1 2 3 4 5 6 7 8

ON DIP

OFF

ON

- 15 -

z SW1~SW4: Time-slots configuration of E1 data in fiber

“√” indicates enable; “×” indicates disable

SW1 definition (default is all OFF)

1st bit 2nd bit 3rd bit 4th bit 5th bit 6th bit 7th bit 8th bit

SET Frame Status TS1 TS2 TS3 TS4 TS5 TS6 TS7

ON Fractional √ √ √ √ √ √ √

OFF Unframed × × × × × × ×

SW2 definition (default is all OFF)

1st bit 2nd bit 3rd bit 4th bit 5th bit 6th bit 7th bit 8th bit

SET TS8 TS9 TS10 TS11 TS12 TS13 TS14 TS15

ON √ √ √ √ √ √ √ √

OFF × × × × × × × ×

SW3 definition (default is all OFF)

1st bit 2nd bit 3rd bit 4th bit 5th bit 6th bit 7th bit 8th bit

SET TS16 TS17 TS18 TS19 TS20 TS21 TS22 TS23

ON √ √ √ √ √ √ √ √

OFF × × × × × × × ×

SW4 definition (default is all OFF)

1st bit 2nd bit 3rd bit 4th bit 5th bit 6th bit 7th bit 8th bit

SET TS24 TS25 TS26 TS27 TS28 TS29 TS30 TS31

ON √ √ √ √ √ √ √ √

OFF × × × × × × × ×

Notice:
When the SW1-1 is OFF (unframed mode) the TS1 to TS31 is invalid.
When the SW1-1 is ON( Fractional mode) the TS1 to TS31 is valid and can not be all OFF. That is to

say there must be some timeslot is enabled.

z SW5: Function selection

SW5 definition (default is all OFF)

1st bit 2nd bit 3rd bit 4th bit 5th

bit

6th bit 7th bit 8th bit

Define

Clock

Timing 1

Clock

Timing 2

TS_FLOW BERT RX

CLK

phase

ALOOP DLOOP RLOOP

ON √ √ √ √ √ √ √ √

OFF × × × × × × × ×

1. The 1

st

and 2nd bit: Clock Timing mode Selection(default are ON)

The Clock mode of device is defined by the 1

st

bit and 2nd bit of SW5, detail is shown in below

table:

SW5-1 SW5-2 Clock Mode
OFF OFF Master Clock (Internal clock)
OFF ON
ON OFF

V.35 terminal Clock ( External ­Follow V.35 input clock)

ON ON Slave Clock ( Follow fiber line clock)

- 16 -

2. The 3

rd

bit: Timeslot auto follow function TS_FLOW (default OFF)

SW5-3 Timeslot auto follow function
ON Enable
OFF Disable

To make local timeslot follow remote timeslot, below four conditions should be ensured:

(1) RC85x series device is used point to point in pair.
(2) There is no any equipment could stop Sa4 bits transmission in Timeslot 0.
(3) Enable this function only in slave clock timing mode.
When all of above condition is satisfied, set the SW5-3 of local device as ON to open timeslot
auto-follow function, the timeslot and frame mode (PCM30/PCM31) of local device will follow the
configurations of remote device automatically.

3. The 4

th

bit: Build-in Bit Error Tester function BERT (default OFF)

SW5-4 Build in Bit Error Tester

ON Enable

OFF Disable

There is an Bit Error Tester Unit inside this series device, and the main purpose of this unit is that
produces testing pattern 2E15-1 std and sends them to optical line. This pattern can be uploaded
to proper data channel through configuration, then via many loop back mode the returned
sequence is sent to device for testing. The testing result will be displayed by the PAT indicator on
front panel. When bit error is captured the PAT indicator turns to off and keep for at least one
second. If there is no new error occur the PAT indicator will come back to steady yellow status.

The device will add test pattern to user data channel after the test function is running. This
function is available in fractional E1 mode and unframed (transparent) E1 mode, at that time all
the V.35 data will be interrupted.

Notice: The bit error test function can be operated with many loop back test. When the local
ALOOP loopback function is disable the loop back can be realized by external fiber patch cord,
but the dual-fiber S3 and all single fiber are forbidden. At the time when PAT indicator is steady
yellow it indicates that correct bits was received. If the RLOOP remote loop back is enabled
accompanied with bit error test, it means the whole information process will be tested.

4. The 5

th

bit: RX CLK Phase (default OFF)

SW5-5 Phase Choosing
ON RX CLK Reverse Phase
OFF RX CLK Positive Phase

The RX CLK phase choosing is provided according to the different V.35 clock and data phase of
different brand router. On Cisco series router the test result of V.35 synchronization WAN
interface is passing when this device is connected and its RX CLK is Positive.

RX CLK is Positive: Data will be sent to RD signal during RX CLK falling edge.

RX CLK

RD

RX CLK is Reverse: Data will be sent to RD signal during RX CLK rising edge.

RX CLK
RD

- 17 -

Notice: The relationship of TX CLK and TD phase of this series device is auto-adjusted, so users
need not to configure it.

5. The 6

th

~ 8th bit: Loopback configuration (default OFF)

6th bit 7th bit 8th bit

ON Enable ALOOP Enable DLOOP Enable RLOOP

OFF Disable ALOOP Disable DLOOP Disable RLOOP

All loopback switches are used for bit error testing, customer could choose the loopback type.

The 6

th

bit: ALOOP (analog loopback) Local fiber optical interface inner loopback

ALOOP is used for test the V.35 cable, RX CLK phase and the modem performance in local site.

The 7

th

bit: DLOOP (Digital loopback) Local V.35 interface inner loopback

DLOOP is used for test the fiber line link, the E1 cable and modem performance in remote site.

The 8

th

bit: RLOOP (Remote loopback) Remote modem V.35 interface inner loopback

RLOOP is used for test the fiber line link, modems performance in both sites.

z SW6: Function selection

SW6 definition (default is all OFF)

1st bit 2nd bit 3rd bit 4th bit 5th bit 6th bit 7th bit 8th

bit

Define Fault

Propagation

Reserved Reserved Reserved Reserved Reserved Reserved RMT

MNG

ON Enable - - - - - - Force

OFF Disable Normal Normal Normal Normal Normal Normal Auto

1. The 1

st

bit: Fault propagation (default OFF)

SW6-1 Fault Propagation

ON Enable

OFF Disable

When fault pass enable, alarms of optical interface Rx and Tx will be transferred to DCD and CTS
signal on V.35 interface; When fault pass disable the DSR, DCD and CTS signals of V.35 interface will
be valid.

V.35

Local site

Modem

BERT

Fiber

Local site

modem

Fiber V.35

BERT

V.35

Remote

site

modem

Local site

Modem

Remote
site
modem

BERT

Fiber V.35

V.35

- 18 -

When fault pass enable, if the device has local alarm (errors on fiber Rx interface) the DCD signal of
V.35 interface will close and DTE device should have some denotation.

When fault pass enable, if the device has remote alarm (errors on fiber Tx interface) the CTS signal of
V.35 interface will close and DTE device should have some denotation.

After power on the DSR signal of this series device will be forever valid.

2. The 8

th

bit: Remote management control RMT_MNG (default OFF)

This bit is setup for forced monitor and management by the remote optical multiplexer
When optical multiplexers are working in pairs, if the module is plugged into RC001-1 single slot
chassis deployed at customer premise, the module will be automatically set up to be managed
by the host-site multiplexer; if it is plugged into RC002-16 16-slot chassis, to be managed by the

remote multiplexer, the module need to be manually set up to that working mode.

Relationship between DIP-switch and software configuration

The corresponding relationship of above device DIP-switch and network management ability is shown
as below table:

Dip-switch Whether the configuration can be changed by software or

not

SW1~SW5 Yes, it can be setup by NMS

SW6 No, it can not.

Typical Application

The connection topologies introduced in this part is only for user reference. Users are advised to
design and deploy the most appropriate topology according to their specific environment.

z Point-to-point, ‘Master Clock – Slave Clock’ Topology

When connecting Routers or other V.35 interface equipment point to point, routers should work in
DTE mode. For the convenience of installation and test, it is advised to set the local modem
‘Master Clock Mode’, and remote modem ‘Slave Clock Mode’. That is, the timing resource is
from the local modem.
In “Master Clock-Slave Clock” topology, if DXC, MUX devices are in E1 link, the DXC, MUX and
remote modem should all be slave clock mode (follow the clock of E1 link)

z Point-to-point, ‘Terminal Clock – Slave Clock’ Topology

When the remote DTE must follow the timing resource of local V.35 clock, that is to say the TX
CLOCK of local TX is inner clock source. In this condition, it is advised to set the local modem
‘Terminal Clock Mode’, and remote modem ‘Slave Clock Mode’.

- 19 -

In (Terminal Clock-Slave Clock) topology, if DXC, MUX devices are in E1 link, the DXC, MUX and
remote modem should all be slave clock mode (follow the clock of E1 link).

z Extended Connection Type

If E1 interface equipment is in user premise, RC852-30 can be in remote site and
RC852-30-FV35 in local site as the above figure. Please be attention to the clock mode, if the E1
interface of ATM is in master clock mode, then local RC852-30-FV35 should be in slave clock
mode.

- 20 -

Chapter 4 Installation and Test

This section contains the following information:

 Inspecting the Product
 Preparation before Installation
 Installation

Inspecting the Product

Before installation, please first check the models and quantities of optical multiplexers and accessories with
the packing list. Also, please check whether the equipment is in perfect condition. Occasionally, drying
process may be needed if the equipment is affected with damp environment.

Preparation before Installation

The following steps are required before installing the optical multiplexers:

It is strictly forbidden to hot-swap the V.35 interface cable

Please read the user manual carefully.
Prepare all the wires and cables that are needed. Make sure there is no reverse connection,
disconnection or short circuit connection. Refer to Appendix A for details of cable making.
Make sure that the voltage of the power supply is within the tolerance range and the chassis is
grounded with the earth.
If you do not use network management, please configure the device through DIP-switch be installation.
Prepare the Bit Error Rate Tester and optical power test-meter for the test of link quality.
Fix the optical multiplexer into RC002-16 (19-inch 3U chassis). Pay attention to the ambience
requirement.

Installation

Check if there is any alarm on local equipment
Test if data communication can be performed between local DTE and remote equipment
If the test is failed, please try the following steps.

1. Local bi-direction loop-back test. Refer to previous dip-switch setup for details. If the Router
indicates loop-back successful, the V.35 interface is working in good condition. If the Router indicates
loop-back fails, please first check the timing resource and bandwidth setup at local site, and try to
adjust the TX CLK and RX CLK phase option switch.

2. If the E1 interface of remote equipment is connected with the ATM E1 interface, please make sure
that there is only on clock source in the network and the time slot configuration of both equipments is
the same

If the link still remains disconnected, please contact the technical support from the local distributors.

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Chapter 5 Troubleshooting

If there are any problems during installation and operation, please try to solve them by the following
suggestions. If they cannot be solved, please contact Raisecom Technology or distributors for help.
The following explanations and solutions for optical port alarms and E1 LOS alarms are used to handle local
alarm problems. For remote-end alarms, please handle them at the remote site.

z Power indicator (PWR) off
Please check if there is any fault with power supply

z LOS indicator of optical port is on red
Loss of receive signals occurs at the optical port. Please check whether the input fiber (RX) is
connected properly and ensure it is not reversely connected. And check the receiving optical
power with optical power test-meter, which shall be bigger than the index of receiving sensitivity.

z LOF indicator of optical port is on red
Loss of frame of optical RX signal, check the receiving optical power with optical power test-meter,
which shall be bigger than the index of receiving sensitivity.

z ERR indicator of optical port is on red
1E-3 or 1E-6 bit error alarm of RX signal, check the receiving optical power with optical power
test-meter, which shall be bigger than the index of receiving sensitivity.

z AIS indicator is on yellow
All the receiving data of optic is ‘1’, check the whole link quality, and confirm non-stop on the traffic.

z LOF or CRC indicator of V.35 port is on red
G.704 frame loss or CRC4 error on the inner E1 channel, please check the framing format and link
quality of the whole link.

z PAT indicator of Test result is not stable when build-in Bit Error Test and Loopback enable
At first, please make sure the fiber line link is connecting correct, and make sure there is no
loopback configuration in the remote unit. At the begging of power on, the modem will initial Bit
error test system in 15 seconds. Normally PWR/PAT is not stable in this process. After 15 seconds,
the PWR/PAT could indicate result of testing.

z Packet loss
It might because the following conditions:
There is more than one clock source in the network;
Check the status of router’s V35 interface, if there is RX/TX data error, please adjust RX CLK
phase of local and remote device.

z When there is conflict between network management software and hardware DIP-switches,

whose priority is higher？

The DIP switches status shall be read only once by CPU when module power on, and then, SNMP
management software has higher priority to setup.

z Compatibility with other vender’s production
This modem is based on PDH fiber technologies, so it can not work in pair with other
manufactory’s modem on the other site, but could be ok of RC85X series modem or any other fiber
optical multiplexer from Raisecom after confirmation.

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Appendix A: Introduction of Cable Making

1. CBL-V35-HDB26M/M34F Cable making Instruction

Description: DCE cable for HDB26 Male interface to M34 Female interface

Note: The default length of CBL-V35-HDB26M/M34F-2M cable is 2.0m. You can order other length cable
according to your requirement.

HDB26 Male V.35 standard

name

ISO2593Female

(M34 Female)
1 PGND A
2 TD(A) P
3 RD(A) R
4 RTS C
5 CTS D
6 DSR E
7 GND B
8 DCD F

11 TD(B) S
15 TCP(A) Y
16 SCTE(B) W
17 RCP(A) V
20 DTR H
21 RD(B) T
23 TCP(B) AA
24 SCTE(A) U
25 RCP(B) X

Other pins have no connection.
Request: The cable material is not lower than 80℃ 30V.

2. CBL-V35-HDB26M/M34M-X Cable making Instruction

This cable is cross connection cable which is used to link the V.35 (DCE) interface of node equipment as
DDN to the V.35 interface of the RC802-30B-FV35 series device. Using this cable if the clock resource is
provided by node equipment the RC802-30B-FV35 series device should be configured to V.35 terminal
mode. If the clock is provided by fiber-optic multiplexer the node equipment’s clock should be slave
mode.

Description: Cross cable for HDB26 Male interface to M34 Male interface

M34 Male interface HDB26 Male interface
Signal name Pin NO. Pin NO. Signal name
TD(A) P 3 RD(A)
TD(B) S 21 RD(B)
RD(A) R 2 TD(A)
RD(B) T 11 TD(B)
RCLK(A) V 24 SCTE(A)
RCLK(B) X 16 SCTE(B)
SCTE(A) U 17 RCLK(A)
SCTE(B) W 25 RCLK(B)

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SGND A 1 SGND
GND B 7 GND
TCLK(A) Y disconnect 15 TCLK(A)
TCLK(B) AA disconnect 23 TCLK(B)

DCD F 8 DCD
DSR E 6 DSR
CTS D 5 CTS
RTS C 4 RTS
DTR H 20 DTR

Other pins have no connection.
Request: The cable material is not lower than 80℃ 30V.

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BROADBAND

to RAISECOM