Raisecom RCMS2601-30 Manuale utente

RCMS2601-30

Modular Ethernet Multiplexer

User Manual

(Rev. A)

Raisecom Technology Co., Ltd

(07/2005)

Raisecom Technology Co., Ltd

1. Cautions

Please read the following notices carefully before installing

and using the device, Raisecom does not respond to any loss

that caused by violating safety notice.

RCMS2601-30 is integrated device that has precise elements,

please avoid violent shakes and impacts, and do not

disassemble or maintain the device yourself. If it is required,

please do it under the guide of our technical staff following in

the steps of anti static. Please contact us if there is any need.

There must be grounding protection for the sake of safety; do

not disassemble the device yourself, we regard it as you waiver

your rights of repair guarantee.

Raisecom Technology Co., Ltd

Contents

1. Cautions ...........................................................................................................................................1

2. Overview ..........................................................................................................................................3

2.1. Introduction ..............................................................................................................................3

2.2. Main Features ..........................................................................................................................3

2.3. Part Number Explanation .........................................................................................................4

3. Parameters.......................................................................................................................................5

3.1. E1 Interface Specification ........................................................................................................5

3.2. Fast Ethernet Interface Specification .......................................................................................5

3.3. Optical Interface Specification..................................................................................................5

3.4. Ambience .................................................................................................................................5

4. How to use .......................................................................................................................................6

4.1. Description of the Front Panel..................................................................................................6

4.2. Dip-switch Setup ......................................................................................................................7

4.2.1. SW1 for Working Modes ..................................................................................................7

4.2.2. Fault-Pass-Through Capability Explanation.....................................................................7

4.2.3. E1 Remote Loop-back Test .............................................................................................8

4.2.4. How to Implement Remote Network Management...........................................................8

5. Installation and Test .......................................................................................................................10

5.1. Inspect after Opening.............................................................................................................10

5.2. Preparation before Installation ...............................................................................................10

5.3. Installation..............................................................................................................................10

5.3.1. Connecting the Cables...................................................................................................10

5.3.2. Function Configuration...................................................................................................11

6. Troubleshooting .............................................................................................................................12

7. Appendix A Cable Making ..............................................................................................................13

A.1 E1 Cable Making..........................................................................................................................13

A.2 Ethernet Cable Making ................................................................................................................13

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2. Overview

2.1. Introduction

RCMS2601-30 Ethernet Multiplexers are fiber-optic transmission devices for dedicated

communication networks, data communication networks, switching networks, and also for

point-to-point networks, medium-sized and small capacity networks. It can multiplex one

E1 channel and one Fast Ethernet on to one fiber-optic cable, and implement the

wire-speed transmission of the Ethernet data. RCMS2601-30 is featured by high

integration and complete network management functions. It can be installed into the

Raisecom 3U-high 16-slot chassis, or desktop single-slot chassis, providing various

network management functions.

RCMS2601-30 Ethernet Multiplexers include the following models.

Model Description

RCMS2601-30-S

Host-site/remote-site module, 10/100Mbps auto-sensing (RJ45), 120 Ohm balanced E1 (RJ45), single strand, single

mode(DSC), dual wavelength, 1550nm TX, 1310nm RX, 0-25 km

RCMS2601-30-S

Host-site/remote-site module, 10/100Mbps auto-sensing (RJ45), 120 Ohm balanced E1 (RJ45), single strand, single

mode(DSC), dual wavelength, 1550nm TX, 1310nm RX, 10-60 km

2.2. Main Features

zLow power consumption due to extra large-scale ASIC chips; high reliability due to

4-layer PCB

zProviding 1 E1 channel interface, transparent transmission mode

zProviding 1 10/100Mbps auto-sensing Ethernet interface

zProviding 1 optical interface, multiplexing E1 and Ethernet data together. 1550nm TX

wavelength

zAlarm indications of local and remote equipment

zSupporting E1 link remote loop-back function, easy fault location

zSupporting speed limit on both transmitting and receiving directions of Ethernet

interface, increment 32kbps

zImplementation of SNMP, capable of local and remote management. It is suggested

that this equipment be deployed at customer premises to work in pairs with

RCMS2401-30 at host site. Both host-site and remote-site network management can

be implemented.

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2.3. Part Number Explanation

Example

RC MS 2 6 01 – 30 – S2

Single mode optical interface, 10-50 km

1 E1 channel

1 Ethernet interface

Modular, single-strand fiber-optic

L2 Ethernet switching capability

Multi-service

Raisecom code (RC short for Raisecom)

Note: Equipments that can work in pairs

Host site Remote site

RCMS2601-30-S1 RCMS2401-30-S1, or

RCMS2301-30-FV35-S1

Single-strand

fiber-optic

equipment RCMS2601-30-S2 RCMS2401-30-S2 or,

RCMS2301-30-FV35-S2

Raisecom Technology Co., Ltd

3. Parameters

3.1. E1 Interface Specification

Bit rate: 2048Kbps±50ppm

Line code: HDB3

Interface impedance: 120Ωbalanced signal

Electrical characteristic: Compliant to ITU-T G.703

Transfer characteristic: Compliant to ITU-T G.823

Jitter Tolerance: ITU-T G.724

3.2. Fast Ethernet Interface Specification

IEEE 802.3

IEEE 802.3u

IEEE 802.1d Spanning Tree

IEEE 802.1q VLAN

Support oversized Ethernet data frame up to 1916 bytes

Working mode: 10/100M Auto-Negotiation, Auto-MDI/MDIX (manual configurable)

Flow control: IEEE802.3x and back pressure

3.3. Optical Interface Specification

Bit rate: 150Mbps

Fiber connector: SC

Transmission distance: Single mode dual-strand S1=0-25 km, S2=10-50 km

3.4. Ambience

Working temperature: 0 ~ 45℃

Relative humidity: ≤90% (25℃)

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4. How to use

4.1. Description of the Front Panel

The sketch of the RCMS2601-30 front panel

Optical Connector:

The optical interface type of RCMS2601-30 is SC/PC.

LAL (Local Alarm):

The red alarm indicator will be lightened when error occurs at local optical receiving

direction. It includes 4 alarm levels: lose of signal, lose of frame, BER exceeds 10-3,

and BER exceeds 10-6. Users shall inquire the network management system for alarm

details.

RAL (Remote Alarm):

The red alarm indicator will be lightened when error occurs at remote optical receiving

(local transmitting) direction. It includes 4 alarm levels: lose of signal, lose of frame,

BER exceeds 10-3, and BER exceeds 10-6.

ETH Ethernet Interface:

RJ45 socket, unshielded twisted pair

LNK/ACT (Link/Action):

The green indicator will be lightened when the link is in normal condition. It flashes

when transmitting to receiving data.

100M (100Mbps):

The green indicator will be lightened when working at the rate of 100Mbps.

E1 Interface:

RJ45 socket, 120 Ohm balanced signal, Pin 1, 2 for output, and Pin 5, 6 for input

L/R LOS (Local/Remote Lose Signal):

The red alarm indicator will be lightened when E1 input loss of frame occurs at the local

site; it flashes when E1 input loss of frame occurs at the remote site.

Power Supply Indicator:

PWR (Power): the green indicator will be lightened when the power supply is in good

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1 2 3 4 5 6 7 8

OFF

condition

4.2. Dip-switch Setup

4.2.1. SW1 for Working Modes

SW1 is an 8-bit dipswitch, as the figure on the right

Switch OFF (default status) ON

1 Enable Ethernet interface auto-sensing Disable Ethernet interface

auto-sensing

2 a) Ethernet forced 100M when

auto-sensing disabled

b)Invalid when auto-sensing enabled

a) Ethernet forced 10M when

auto-sensing disabled

b) Invalid when auto-sensing enabled

3 a) Ethernet forced full duplex when

auto-negotiation disabled

b) Ethernet forced full duplex when

auto-negotiation failed; invalid when

auto-negotiation success

a) Ethernet forced half duplex when

auto-negotiation disabled

b) Ethernet forced half duplex when

auto-negotiation failed; invalid when

auto-negotiation success

4 Reserved Reserved

5 Fault Pass Through disabled Fault Pass Through enabled

6 Enable MDI/MDIX auto-negotiation Disable MDI/MDIX auto-negotiation.

Straight-through cable shall be used to

connect to Switch; crossover cable

shall be used to connect to NIC and

Routers

7 E1 link normal working mode E1 link remote loop-back

8 Auto recognition of network

management channel

Forced remote network management.

Please configure as per the network

topology.

Note: The other dip-switch SW2 is a 2-bit switch, which shall be used by manufacturing

people. Users are not advised to change the default status.

4.2.2. Fault-Pass-Through Capability Explanation

When Fault-Pass-Through capability is enabled, there are 3 situations that we call it a link

fault.

1．The equipment will monitor the status of remote Ethernet interface. When it

changes to link down from link up, we take it as a link fault of remote Ethernet. At

the same time, the status of local module will change to link down form link up. It

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will not be recovered until the fault disappears at remote site.

2．The equipment will monitor the status of remote E1 interface. When it changes to

loss of signal status from normal, we take is as a link fault of remote E1 link. At the

mean time, the equipment will cut off the transmission of local E1 interface but not

send AIS signal. The local E1 interface will not recover until the fault disappears at

remote site.

3．The equipment will monitor the status of optical link, either transmitting alarm or

receiving alarm will be taken as an optical link fault. At the mean time, the Ethernet

interface status will change to link down and the E1 interface will be cut off. The

Ethernet interface and E1 interface will not recover until the optical interface

recovers.

The fault-pass-through capability is designed for users who have particular

requirements. When it is disabled, any fault at remote site and at optical interface has

nothing to do with local interfaces; all the interfaces of local module will be open.

In order to avoid misunderstanding, users are advised to use it cautiously. The factory

default status is disabled.

4.2.3. E1 Remote Loop-back Test

“E1 remote loop-back” setup at local Ethernet Multiplexer

Note: when setup any kinds of loop-back at the local Ethernet Multiplexer, the “remote

loop-back” switch at remote Ethernet Multiplexer must be at default status.

When the module is at E1 remote loop-back status, the Ethernet data communication will

not be interfered.

4.2.4. How to Implement Remote Network Management

When the equipment is connected as the following topology, the remote network

management can be implemented.

Local site

Interface

Circuit

Interface

Circuit

Fiber-optic

E1 interface

Multiplex

Core

BERT

Multiplex

Core

Remote site

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A．The host-site module is installed in Raisecom’s dedicated 16-slot 3U-high chassis,

which also has the network management module installed. The remote-site module

is installed in Raisecom’s single slot chassis.

B．The both modules are installed in 16-slot 3U-high chassis, but only the host-site

chassis is equipped with network management module. The remote-site module

shall be set to “forced remote network management mode”. That is to say, the 8th

switch shall be turned to ON.

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