Tài liệu E1 Quad Fibre Loop Converter pdf

4/04 • 479Quad Fibre Loop Converter Module Features Alarm and Test Access Diagnostics of remote far end alarms can be accessed locally at the CE by pressing the Remote Alarm Display swit

E1 Quad Fibre Loop Converter

Introduction

The Quad Fibre Loop Converter* (QFLC) system is a cost-effective optical multiplexer that transports four E1s over two singlemode fibres The QFLC system can be configured to maximize facility utilization for point-to-point or point-to-multipoint topologies

The QFLC system can also be used for fibre ring networks for both dual-feed and single-feed applications to a customer The QFLC system accepts standard electrical E1 signals and can be used in a stand-alone configuration with any approved multiplexer or network element that generates a standard E1 (6.703 Mbps) signal The QFLC system consists of a rack mount central exchange (CE) chassis with up to eight QFLC modules Sixteen protected (or thirty-two

unprotected) E1s can be transported from a single eight-position CE chassis and can hub to four remote terminals (RTs) in a protected configuration (eight RTs in an unprotected configuration)

Protected vs Unprotected Circuits

The ADC QFLC multiplexes up to four E1 signals for simultaneous two-way (full duplex) transport over two singlemode fibres for distances up to 33 km Two fibres are used when deploying unprotected service Four fibres should be planned for use when deploying protected service; two fibres are used for the working circuits and two fibres are dedicated to circuit protection The QFLC system configured for protected applications is a 1:1 protected system Automatic protection switching (APS) is established with a setting on the chassis’ backplane during

installation This ensures against failures to either the optical facilities or the electronics The system also monitors degrading bit error rate (BER), and it will protection switch once the bit error rate passes a user-selectable threshold

In the unprotected configuration, one module is located at the CE and one module is located at the RT In the protected configuration, a second set of modules (one at the CE and one at the RT) is connected to two additional singlemode fibres If service fault conditions occur in the working system (i.e., loss of signal, BER threshold violation, module failure), the protect system is automatically switched, non-interrupted, into service and appropriate alarms are triggered to identify the fault state

Note that with the ADC QFLC system, redundancy is provided by duplicating the working system with identical components No external protection switches or other subsystems are needed One plug-in module performs all functions: master, remote and stand-by

Application Overview

* US Patent Number 5,047,735

4/04 • 479

Quad Fibre Loop Converter

System Description

ADC QFLC System Unprotected Configuration

Central Exchange/Controlled Environmental Vault (CEV)/Hut

Customer Premises (Each Location)

M P U

Q F L C

1 2 3 4 5 6 7 8

2 FIBRES

CENTRAL EXCHANGE/

CEV/HUT/CABINET

CUSTOMER PREMISES

ON-LINE

4 E1s TO

NETWORK

ON-LINE

CUSTOMER PREMISES

4 E1s 1

QFLC

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Quad Fibre Loop Converter

System Description

ADC QFLC System Protected Configuration

Central Exchange/Controlled Environmental Vault (CEV)/Hut

Customer Premises (Each Location)

M P U

Q F L C

1 2 3 4 5 6 7 8

4 FIBRES,

TWO FIBRES WORKING AND TWO FIBRES PROTECT

CENTRAL EXCHANGE/

CEV/HUT/CABINET

CUSTOMER PREMISES

Q F L C

ON-LINE

4 E1s TO

NETWORK

4 E1s

ON-LINE

1 QFLC 2 QFLC

STAND-BY STAND-BY

4/04 • 479

Quad Fibre Loop Converter

System Description

QFLC Transport Module

For E1 transport, the QFLC system requires only one type of module This module is

interchangeable and is the same module for working and protect, CE/RT and customer premises

In a protected system, two modules are required at each end (CE/RT and customer premises), one pair for main and one pair for protect In an unprotected system, one module is required at each end (CE/RT and customer premises)

Technical specifications for the QFLC are summarized below

Each E1 circuit provisioned via the QFLC can be individually provisioned for either AMI or HDB3 The two line codes can be intermixed on the same module and are automatically duplicated on the protect module in the event of a failure The selection switches for AMI/HDB3 are located on the module’s faceplate This allows for in-service changes to the line code settings without

removing the module from the chassis and without affecting service on the other E1s

Two levels of performance-based alarms (BER) are selectable on the QFLC, via switches on the faceplate Selectable BER switching range can be selected from 10 -4 to 10 -10 with minor alarm notification selectable from 10 -6 to 10 -10 These levels are user selectable and can be changed in-service when needed

MPU

The Micro Processor Unit (MPU) is a monitoring system interface between the QFLC modules and

a Telemetry Byte Oriented Serial (TBOS) interface administration location The MPU is not required

at the customer premises site as all alarms are transported back to the CE TBOS terminates the alarms and extends them to the network alarm surveil-lance center The MPU is mounted in the eight position CE/RT chassis An MPU module is not required in the system if not employing TBOS For alternative network management systems, contact ADC International Application Engineering

Specifications

*When used with dispersion shifted fibre, optical budget is 21 dB.

4/04 • 479

Quad Fibre Loop Converter

Module Features

Alarm and Test Access

Diagnostics of remote far end alarms can be accessed locally at the CE

by pressing the Remote Alarm Display switch The far end alarms will display on the local CE QFLC front plate indicators This feature can be used to determine the cause of a remote alarm without dispatching a troubleshooter, simplifying trouble diagnostics and allowing for single-ended troubleshooting

The module also has individual E1 remote loopback capability which allows single-ended performance testing with end-to-end link visibility from the CE

Test access jacks for maintenance are built into the system at the customer premises wall mount chassis

AMI/HDB3 Option

Each E1 signal is optionable by the user

Clear Channel Frame Format Option

The QFLC is transparent to frame formats

E2A/TBOS Alarm Compatibility

The QFLC system provides major, minor and remote relay contact closures for interface to E2A alarm systems The QFLC system is upgradeable to TBOS interface

Remote Alarms

The QFLC provides two types of remote alarms

The remote alarms report the module and alarm status of the far end unit to the near end unit By pressing the Remote Alarm Display switch

on the near end unit, the front panel instantly displays the LED status of the far end unit

The housekeeping alarm inputs tie in external alarms, such as open door, air conditioning, or channel bank alarms Like the remote alarms, the housekeeping alarms are transported via an overhead channel

QFLC Front View

ENABLE MAJOR MINOR RMT/HSKP BER Y MOD FAIL R

OFF R

ONLINE G STDBY Y

FORCE SW Y APS LOCKOUT R

E1 LOS/LPBK STATUS RLB NORMAL UNEQPT

1

2

3

4

1 3

LINE CODE OFF = HDB3

G = AMI

STATUS

G = INSERV

R = LOS

Y = LPBK OFF = UNEQPT

1 3

SELECT AMI HDB3

RESET

LMPTST/

FORCE SW RMT ALM DISPLAY

4 5 6 8 10

n =

6 8 10

BER > 10 -n

PROT SW BER > 10 -n

MIN ALM

27.18 cm

3.81cm

4/04 • 479

QFLC Applications

Point-to-Multipoint

From a central office or remote terminal, the QFLC system can be configured to serve four protected E1s to four separate customer or eight unprotected E1s to eight separate customers

Central Exchange

Point to

Multipoint

Unprotected Configuration

Protected Configuration

A C / D Q F C 1

F I P

END USER #1

BATTERY BACKUP

E1 SERVICES

E1

CENTRAL EXCHANGE

QFLC

M P U Q F C 1

Q F C 2

Q F C 3

Q F C 4

2 FIBRES

A C / D Q F C 1

F I P

END USER #2

BATTERY BACKUP

E1 SERVICES

A C / D Q F C 1

F I

P BATTERY BACKUP

E1 SERVICES A

C / D Q F C 1

F I

P BATTERY BACKUP

E1 SERVICES

A C / D

Q F C 1

F I P

END USER #1

BATTERY BACKUP

E1 SERVICES Q F C 2

E1

CENTRAL EXCHANGE

QFLC

M P U Q F C 1

4 FIBRES (2 W/ 2 P)

A C / D Q F C 1

F I P

END USER #2

BATTERY BACKUP

E1 SERVICES

Q F C 2

A C / D

Q F C 1

F I

P BATTERY BACKUP

E1 SERVICES Q F C 2

A C / D

Q F C 1

F I

P BATTERY BACKUP

E1 SERVICES Q S F

Q F C 2

Q F C 3

Q F C 4

Q F C 5

Q F C 6

Q F C 7

Q F C 8

W P W P W P W P

W P

W P

• Up to eight (unprotected)

or four (protected)

customer locations can

be served from one CE 8

position chassis.

• When adding service to

existing customer or new

customer you can serve

out of existing CE chassis

or new CE chassis

depending on chassis

capacity available,

determined by current or

planned use.

• In the unprotected

configuration, two fibres

are used to customer

premises (transmit/

receive); in the protected

configuration, four fibres

are used to customer

premises (2 working /

2 protect).

Central Exchange

Customer Premises (Each Location)

QFLC modules

DDF = Digital Distribution Frame FDF = Fibre Distribution Frame FIP = Fibre In-Building Panel MPU = Micro Processor Unit NID = Network Interface Device

P = Protect QFLC = E1 Quad Fibre Loop Converter

4/04 • 479

Hubbing and Campus

The eight position QFLC chassis used in conjunction with a 140 megabit (DDM) or 155 megabit (SDM) multiplexer can support multiple customers

in a hubbing or campus application

Central Exchange

Hut

Business Park

Unprotected Configuration

Protected Configuration

A / D Q F C

F I P

END USER #1

BATTERY BACKUP

E1

RT (HUT/CEV)

QFLC

M P Q F C Q F C Q F C Q F

C FDF

2 FIBRES

A / D Q F C

F I P

END USER #2

BATTERY BACKUP

A / D Q F C

F I

P BATTERY BACKUP

A / D Q F C

F I

P BATTERY BACKUP

N I D

N I D

N I D

N I D

E1 DDF

155 Mb MUX

155 Mb MUX

FDF

CENTRAL EXCHANGE

F I P

END USER #1

BATTERY BACKUP

E1

RT (HUT/CEV)

FDF

4 FIBRES (2 W/ 2 P)

F I P

END USER #2

BATTERY BACKUP

F I

P BATTERY BACKUP

F I

P BATTERY BACKUP

N I D

N I D

N I D

N I D

E1 DDF

155 Mb MUX

155 Mb MUX

FDF

CENTRAL EXCHANGE

A / D Q F C Q F C

W P

QFLC

M P Q F C Q F C Q F C Q F C

A / D Q F C

W P W P

Q F C Q F C Q F C Q F C

W P W P

Q F C

W P

A / D Q F C Q F C

W P A

/ D Q F C Q F C

W P

• Up to eight (unprotected)

or four (protected)

customer locations can

be served from one CE 8

position chassis.

• When adding service to

existing customer or new

customer you can serve

out of existing CE chassis

or new CE chassis

depending on chassis

capacity available,

determined by current or

planned use.

• In the unprotected

configuration, two fibres

are used to customer

premises (transmit/

receive); in the protected

configuration, four fibres

are used to customer

premises (2 working /

2 protect).

RT/CEV/Hut

Customer Premises (Each Location)

QFLC modules

CEV = Controlled Environmental Vault DDF = Digital Distribution Frame FDF = Fibre Distribution Frame FIP = Fibre In-Building Panel MPU = Micro Processor Unit NID = Network Interface Device

P = Protect QFLC = E1 Quad Fibre Loop Converter

QFLC Applications

4/04 • 479

Distribution Within High Rise Building

The four position customer premises wall mount chassis can be used to provide fibre E1 extensions using optical riser cable in a high rise building

Central

Exchange

Building High Rise

Protected Configuration

Unprotected Configuration

A / D

Q F C BATTERY BACKUP E1

QFLC

M P Q F C

Q F C

155 Mb MUX TO

CENTRAL EXCHANGE

E1

NID

A / D

Q F C BATTERY BACKUP

E1

NID

FLOOR #10

BASEMENT

FLOOR #30

HIGH RISE BUILDING

A / D

Q F C BATTERY BACKUP

E1 Q F C

W P

QFLC

M P Q F C

Q F C

Q F C

Q F C

W P W P

155 Mb MUX TO

CENTRAL EXCHANGE

E1

NID

A / D

Q F C BATTERY BACKUP

E1 Q F C

W P

NID

FLOOR #10

BASEMENT

FLOOR #30

HIGH RISE BUILDING

• Up to eight (unprotected)

or four (protected)

customer locations can

be served from one CE 8

position chassis.

• QFLC chassis on

customer floor is a wall

mount chassis.

Basement (Hubbing) Location

Customer Premises (Each Location)

MPU = Micro Processor Unit

NID = Network Interface Device

P = Protect

QFLC = E1 Quad Fibre Loop Converter

QFLC Applications

4/04 • 479

Digital Loop Carrier (DLC) Remote Pedestal

The QFLC can be used to feed remote pedestals or cabinets for DLC applications using the ADC TDC-240, up to 240 subscribers (POTS or COIN) can be serviced with a single QFLC system

• This application provides

four E1s via fibre to feed

a DLC cabinet

QFLC Applications

CEV = Controlled Environmental Vault

DLC = Digital Loop Carrier

FDF = Fibre Distribution Frame

MPU = Micro Processor Unit

P = Protect

Protected Configuration

Unprotected Configuration

E1

RT (HUT/CEV)

TO OTHER DLC REMOTE CABINETS E1 DDF

155 Mb MUX

QFLC

M P U Q F C 1 W

REMOTE

2 POSITION RACK MOUNT QFLC

DLC SYSTEM

TO CENTRAL

2 FIBRES FDF

E1

RT (HUT/CEV)

4 FIBRES (2 W/ 2 P)

155 Mb MUX

QFLC

M P U Q F C 1

Q F C 2

W P

REMOTE

2 POSITION RACK MOUNT QFLC

DLC SYSTEM

TO CENTRAL

QFLC P

TO OTHER DLC REMOTE CABINETS

FDF

RT/CEV/Hut

Remote Cabinet (Each Location)

Digital Loop Carrier (1-240 subscribers)

4/04 • 479

Universal 8 Position Rack Mount Chassis

The CE and RT universal rack mounted chassis are available in either eight or two position

configurations

Up to four (4) eight position chassis can fit into a 2.14 m (7') bay and should be fused at 5 Amps each The engineer should determine the number of chassis initially installed Additional growth chassis (not to exceed a total of four per bay) can be added to a bay as required The eight

position chassis is powered by two -48 Vdc power feeds This chassis may be ordered with either front or rear access, and with wire-wrap or 50-pin connectors for wiring the E1 terminations

• Dimensions (HxWxD): 39.92 x 48.26 x 30.43 cm (15.72" x 19" x 11.98"); extender brackets

supplied for 58.42 cm (23") rack practices

• Weight (empty): 15.90 kg (35 lbs)

• 10.16 or 12.7 cm (4" or 5") recess mounting, EIA or WECO rack.

• Chassis access points for fibre optic cabling is either front or rear, left or right.

• Chassis access points for E1 cable is either left front or right rear.

• -48 Vdc A and B power feeds.

• Fuse each chassis at 5 Amps.

Description of Modules and Chassis

CE and RT Rack Mount Chassis

39.93 cm 35.56 cm

46.53 cm 48.26 cm

E1 TERMINATION AND ALARM ACCESS PANEL (FRONT OR REAR ACCESS)

30.43 cm

FRONT FIBRE OPTIC PATCH CORD ACCESS BOTH SIDES

REAR FIBRE OPTIC

PATCH CORD ACCESS

BOTH SIDES

FRONT ACCESS TO COPPER E 1 TERMINATION PANEL

REAR ACCESS TO

COPPER E1 TERMINATION PANEL

4/04 • 479

2.14 m (7') Bay Configuration

• Fully configured 2.14 m (7') bay

using a central office universal 8

position rack mount chassis

• No additional equipment is required

in a fully configured bay (i.e fans,

heat baffles, etc.)

• Fuse each chassis at a maximum of

5 Amps

2 Position QFLC

Rack Mount Chassis

For delivery of four protected E1s or

eight unprotected E1s, use the two

position front access chassis This two

position chassis also has integrated

jacks for access to the E1 circuit and is

recommended for applications where

rack space is limited (e.g., in cabinets)

• Dimensions (HxWxD): 10.16 x 58.42 x 30.48 cm (4" x 23" x 12"); 48.26 cm (19") version available

• Weight of empty chassis: 7.27 kg (16 lbs)

• Flush, 5.08, 10.16 or 12.7 cm (2", 4" or 5") recessed mounting, WECO rack.

• Chassis access points for fibre optic cabling is either front left or rear right or left.

• Chassis access for E1 cable is front right.

• -48 Vdc A and B power feeds.

• Fuse each chassis at 3 Amps.

Description of Modules and Chassis

CE and RT Rack Mount Chassis

1 5 10 15 20 25 30 35 40 43

2.14 m

FUSE PANEL

1 5 10 15 20 25 30 35 37

2.14 m

FUSE PANEL

UNIVERSAL

8 SLOT CHASSIS

UNIVERSAL

8 SLOT CHASSIS

UNIVERSAL

8 SLOT CHASSIS

UNIVERSAL

8 SLOT CHASSIS

WECO SPACING EIA SPACING

UNIVERSAL

8 SLOT CHASSIS

UNIVERSAL

8 SLOT CHASSIS

UNIVERSAL

8 SLOT CHASSIS

UNIVERSAL

8 SLOT CHASSIS

5.08 cm 4.45 cm

7.62 cm (2) 1.22 cm (2) 56.69 cm

58.42 cm

FRONT VIEW

SIDE VIEWS

REAR VIEW

REAR FIBRE OPTIC PATCH CORD ACCESS

FRONT FIBRE OPTIC PATCH CORD ACCESS

FRONT ACCESS TO COPPER E1 TERMINATION PANEL

BANTAM JACK ACCESS

REAR FIBRE OPTIC PATCH CORD ACCESS

POWER AND ALARM TERMINATIONS