Tài liệu E1 Quad Fibre Loop Converter pdf

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.
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E1 Quad Fibre Loop Converter
Quad Fibre Loop Converter
System Description
ADC QFLC System Unprotected Configuration
Equipment List of ADC Products Quantity
Central Exchange/Controlled Environmental Vault (CEV)/Hut
Universal 8 position chassis 1
QFLC modules (based on number of locations) 8 max. per chassis
Micro processor unit (optional) 1
Customer Premises (Each Location)
2 position chassis 1
QFLC modules 2 max. per chassis
Battery back-up (optional) 1
M
P
U
Q
F
L
C
12345678
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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E1 Quad Fibre Loop Converter
Quad Fibre Loop Converter
System Description
ADC QFLC System Protected Configuration
Equipment List of ADC Products Quantity
Central Exchange/Controlled Environmental Vault (CEV)/Hut
Universal 8 position chassis 1
QFLC modules (based on number of locations) 8 max. per chassis
Micro processor unit (optional) 1
Customer Premises (Each Location)
2 position chassis 1
QFLC modules 4 max. per chassis
Battery back-up (optional) 1
M
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F
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12345678
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
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4/04 • 479
E1 Quad Fibre Loop Converter
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
E1s/System: 4
Fibre: Singlemode
Fibres/Unprotected System: 2
Fibres/Protected System: 4
Wavelength: 1310 nm
Optical Budget: 22 dB*
Transmission Distance (nominal): 33 km (20 miles)
Fibre Connector: FC

Line Code Options: AMI/HDB3 (selectable)
Operating Temperatures: -0
°
C to 50
°
C
*When used with dispersion shifted fibre, optical budget is 21 dB.
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E1 Quad Fibre Loop Converter
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
OPT
LOS Y
OFF R
ONLINE G
STDBY Y
FORCE SW Y
APS LOCKOUT R
E1 LOS/LPBK
STATUS
RLB

NORMAL
UNEQPT
1
2
3
4
1
2
3
4
LINE CODE
OFF = HDB3
G = AMI
STATUS
G = INSERV
R = LOS
Y = LPBK
OFF = UNEQPT
1
2
3
4
SELECT
AMI
HDB3
RESET
LMPTST/
FORCE SW
RMT ALM
DISPLAY

4
5
6
7
8
9
10
n =
6
7
8
9
10
BER > 10
-n
PROT
SW
BER > 10
-n
MIN
ALM
27.18 cm
3.81cm
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E1 Quad Fibre Loop Converter
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
C
Q
F
L
C
1
F
I
P
END USER #1
BATTERY
BACKUP
E1
SERVICES
E1
CENTRAL EXCHANGE
QFLC
M

P
U
Q
F
L
C
1
Q
F
L
C
2
Q
F
L
C
3
Q
F
L
C
4
DDF FDF
2 FIBRES
A
C
/
D
C
Q

F
L
C
1
F
I
P
END USER #2
BATTERY
BACKUP
E1
SERVICES
END USER #3
END USER #4
A
C
/
D
C
Q
F
L
C
1
F
I
P
BATTERY
BACKUP
E1

SERVICES
A
C
/
D
C
Q
F
L
C
1
F
I
P
BATTERY
BACKUP
E1
SERVICES
A
C
/
D
C
Q
F
L
C
1
F
I

P
END USER #1
BATTERY
BACKUP
E1
SERVICES
Q
F
L
C
2
E1
CENTRAL EXCHANGE
QFLC
M
P
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Q
F
L
C
1
DDF FDF
4 FIBRES
(2 W/ 2 P)
A
C
/
D
C

Q
F
L
C
1
F
I
P
END USER #2
BATTERY
BACKUP
E1
SERVICES
END USER #3
END USER #4
Q
F
L
C
2
A
C
/
D
C
Q
F
L
C
1

F
I
P
BATTERY
BACKUP
E1
SERVICES
Q
F
L
C
2
A
C
/
D
C
Q
F
L
C
1
F
I
P
BATTERY
BACKUP
E1
SERVICES
Q

S
3
F
2
Q
F
L
C
2
Q
F
L
C
3
Q
F
L
C
4
Q
F
L
C
5
Q
F
L
C
6
Q

F
L
C
7
Q
F
L
C
8
WP
WPWP
WP
WP
W
P
WP
WP
• 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).
Equipment List of ADC Products Quantity
Central Exchange
Universal 8 position chassis 1
QFLC modules (based on number of locations) 8 max. per chassis
Micro processor unit (optional) 1
Customer Premises (Each Location)
2 position chassis 1
QFLC modules
Unprotected configuration 2 max. per chassis
Protected configuration 4 max. per chassis
Battery back-up (optional) 1
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
W = Work
7

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E1 Quad Fibre Loop Converter
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
Exchan
g
e
Hut
Business Park
Unprotected Configuration
Protected Configuration
A
C
/
D
C
Q
F
L
C
1
F
I
P
END USER #1
BATTERY

BACKUP
E1
RT (HUT/CEV)
QFLC
M
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F
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1
Q
F
L
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2
Q
F
L
C
3
Q
F
L
C
4
FDF
2 FIBRES
A

C
/
D
C
Q
F
L
C
1
F
I
P
END USER #2
BATTERY
BACKUP
END USER #3
END USER #4
A
C
/
D
C
Q
F
L
C
1
F
I
P

BATTERY
BACKUP
A
C
/
D
C
Q
F
L
C
1
F
I
P
BATTERY
BACKUP
N
I
D
N
I
D
N
I
D
N
I
D
E1

E1
E1
E1
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
END USER #3
END USER #4

F
I
P
BATTERY
BACKUP
F
I
P
BATTERY
BACKUP
N
I
D
N
I
D
N
I
D
N
I
D
E1
E1
E1
E1
E1
DDF
155 Mb
MUX

155 Mb
MUX
FDF
CENTRAL EXCHANGE
A
C
/
D
C
Q
F
L
C
1
Q
F
L
C
2
WP
QFLC
M
P
U
Q
F
L
C
1
Q

F
L
C
2
Q
F
L
C
3
Q
F
L
C
4
A
C
/
D
C
Q
F
L
C
1
WPWP
Q
F
L
C
5

Q
F
L
C
6
Q
F
L
C
7
Q
F
L
C
8
WPWP
Q
F
L
C
2
WP
A
C
/
D
C
Q
F
L

C
1
Q
F
L
C
2
WP
A
C
/
D
C
Q
F
L
C
1
Q
F
L
C
2
WP
• 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).
Equipment List of ADC Products Quantity
RT/CEV/Hut
Universal 8 position chassis 1
QFLC modules (based on number of locations) 8 max. per chassis
Micro processor unit (optional) 1
Customer Premises (Each Location)
Universal 4 position chassis 1
QFLC modules
Unprotected configuration 2 max. per chassis
Protected configuration 4 max. per chassis
Battery back-up (optional) 1
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
W = Work
QFLC Applications
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E1 Quad Fibre Loop Converter
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
C
/
D
C
Q

F
L
C
1
BATTERY
BACKUP
E1
QFLC
M
P
U
Q
F
L
C
1
Q
F
L
C
2
155 Mb
MUX
TO
CENTRAL
EXCHANGE
E1
NID
A
C

/
D
C
Q
F
L
C
1
BATTERY
BACKUP
E1
NID
FLOOR #10
BASEMENT
FLOOR #30
HIGH RISE BUILDING
A
C
/
D
C
Q
F
L
C
1
BATTERY
BACKUP
E1
Q

F
L
C
2
WP
QFLC
M
P
U
Q
F
L
C
1
Q
F
L
C
2
Q
F
L
C
3
Q
F
L
C
4
WPWP

155 Mb
MUX
TO
CENTRAL
EXCHANGE
E1
NID
A
C
/
D
C
Q
F
L
C
1
BATTERY
BACKUP
E1
Q
F
L
C
2
WP
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.
Equipment List of ADC Products Quantity
Basement (Hubbing) Location
Universal 8 position chassis 1
QFLC modules (based on number of locations) 8 max. per chassis
Micro processor unit (optional) 1
Customer Premises (Each Location)
Universal 4 position chassis 1
QFLC modules
Unprotected configuration 2 max. per chassis
Protected configuration 4 max. per chassis
Battery back-up (optional) 1
MPU = Micro Processor Unit
NID = Network Interface Device
P = Protect
QFLC = E1 Quad Fibre Loop Converter
W = Work
QFLC Applications
9
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E1 Quad Fibre Loop Converter

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
W = Work
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
L
C
1
W
••
REMOTE
CABINET
2 POSITION
RACK MOUNT QFLC
DLC SYSTEM
TO
CENTRAL
EXCHANGE
QFLC W
••
2 FIBRES
FDF
E1
RT (HUT/CEV)
4 FIBRES
(2 W/ 2 P)
E1
DDF
155 Mb
MUX
QFLC
M
P

U
Q
F
L
C
1
Q
F
L
C
2
WP
••
••
REMOTE
CABINET
2 POSITION
RACK MOUNT QFLC
DLC SYSTEM
TO
CENTRAL
EXCHANGE
QFLC W
QFLC P
TO OTHER
DLC REMOTE
CABINETS
FDF
Equipment List of ADC Products Quantity
RT/CEV/Hut

Universal 8 position chassis 1
QFLC modules (based on number of locations) 8 max. per chassis
Micro processor unit (optional) 1
Remote Cabinet (Each Location)
2 position chassis 1
QFLC modules 2 max. per chassis
Battery back-up (optional) 1
Digital Loop Carrier (1-240 subscribers)
TDC 240* central exchange terminal 1
TDC 240* remote terminal 1
*For more information on the TDC 240, please call ADC Telecommunications.
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E1 Quad Fibre Loop Converter
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
12345678
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
TERMINATI
O
N PANEL
REAR ACCESS TO
COPPER E1
TERMINATI
O
N PANEL
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E1 Quad Fibre Loop Converter
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
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E1 Quad Fibre Loop Converter
Description of Modules and Chassis
Customer Premises Chassis
• Dimensions (HxWxD): 43.18 x 40.64 x 24.38 cm (17" x 16" x 9.6")
• Weight (empty): 15.45 kg (34 lbs)
• Chassis access points for fibre optic cabling is either top or bottom.
• Chassis access for E1 cable is top or bottom (wire-wrap configuration) or external right side access
(RJ configuration).
• 115 VAC / 220 VAC or -48 Vdc (dependent on chassis ordered).
• Lockable door.
6.65 cm
40.44 cm
FRONT VIEW
25.22 cm
RIGHT SIDE VIEW
1
2

3
4
5
(-) UPPER POWER SUPPLY
(-) LOWER POWER SUPPLY
(+) UPPER POWER SUPPLY
(+) LOWER POWER SUPPLY
GND (BOTH)
DETAIL A
BOTTOM VIEW
FIBRE AND COPPER ENTRY
AC POWER CORD
31.50 cm
5.99 cm
31.75 cm
7.95 cm
SEE DETAIL A
BACK VIEW
LEFT SIDE VIEW
TOP VIEW
FIBRE AND COPPER ENTRY
UNIVERSAL
FOUR
POSITION
CHASSIS
BATTERY
BACK-UP
RECTIFIER
CABINET
BATTERY

BACK-UP
CABINET
42.88 cm
22.86 cm
24.13 cm
Universal 4 Position Wall Mount Chassis
The customer premises wall mount chassis has four positions
chassis, and is ordered with either RJ or wire-wrap
terminations, AC or -48 Vdc power, and with a battery back-
up system.
The back-up battery system mounts on the wall below the four
position chassis and connects to the chassis via a -48 Vdc
power feed cable at the bottom of the cabinet.
This customer premises chassis is designed to be an integrated
unit. Included in the lockable wall mount chassis is Bantam jack
access to the E1 circuit, redundant AC power converters
(optional) and storage of excess fibre.
The customer premises wall mount chassis can be configured
for two protected systems (8 E1s) or two unprotected systems
(8 E1s).
Contact ADC for information on alternative mains supplies
(200-240 volt, 50/60 Hz)
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4/04 • 479
E1 Quad Fibre Loop Converter
Description of Modules and Chassis
Typical Supply Current Requirements
On-Line QFLC: 250 mA at -48 Vdc
Off-Line QFLC Module: 125 mA at -48 Vdc

Protected QFLC System: 490 mA + 125 mA = 615 mA
Powering Considerations
The CE/RT eight position chassis requires -48 Vdc for operation. The four position customer
premises wall mount chassis can be powered via -48 Vdc or 110/220 VAC.
The customer premises chassis may be ordered equipped with redundant 220 V to -48 V power
supplies. These AC/DC power supplies use a 220 VAC commercial power supply which enables
them to be powered directly from a standard 220 VAC outlet or from a locally supplied -48 Vdc
power source at the customer’s location.
A 10 Amp hour battery back-up system is available to provide six to eight hours of battery back-
up to a fully loaded universal four position chassis. (110 volt mains)
NOTE: Off-line and on-line refer to QFLC system in a
protect configuration. On-line module refers to the
working modules in a protect system. Off-line modules
refer to the protect, back-up module.
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4/04 • 479
E1 Quad Fibre Loop Converter
Description of Modules and Chassis
Optional Equipment
Swing Out Bracket
The swing out bracket allows for the wall mount chassis to be mounted on a plate and swung out
for module installation if the side of chassis is located close to a perpendicular wall obstruction,
minimizing the “keep out” area needed on either side of the chassis
Mounting Bracket
The mounting bracket is used to rack mount the 4 position wall mount chassis or the battery
back-up system. It is used where the wall mount configuration is desirable, but only 23" wide rack
space is available.
2 Position Horizontal Bracket
The 2 position horizontal bracket is used to vertically wall mount 2 position chassis.

ADC Telecommunications, Inc., P.O. Box 1101, Minneapolis, Minnesota USA 55440-1101
Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, ADC
reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our headquarters
office in Minneapolis. ADC Telecommunications, Inc. views its patent portfolio as an important corporate asset and vigorously enforces its patents.
Products or features contained herein may be covered by one or more U.S. or foreign patents.
479 4/04 Revision © 1994, 1996, 2004 ADC Telecommunications, Inc. All Rights Reserved
Web Site: www.adc.com
From North America, Call Toll Free: 1-800-366-3891 • Outside of North America: +1-952-938-8080 Fax: +1-952-917-3237
For a listing of ADC’s global sales office locations, please refer to our web site.