Page 1
Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 1 OF 10
File No RDPS-POTS414
Revision R0
System Application Asymmetric Digital Subscriber Line
Product Type POTS Splitter
Product Name CPF118F
Date Sep. 10th, 2002
Alvin Liou - Design Engineer, R&D_1Issued By
alvin@ycl.com.tw
Roger Wu – Manager, R&D_1Approved By
Roger@ycl.com.tw
Issued Date
YCL Electronics Co., Ltd.
No.95, Feng Jen Road. Feng Shan City, Kaohsiung, Taiwan, R.O.C.
This controlled document is the property of YCL Electronics Co., Ltd. Any duplication
reproduction or transmission by unauthorized parties without the prior written
permission of YCL Electronics Co., Ltd. is prohibited.
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 2 OF 10
Table of contents
Item Description Page
1 Introduction
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3
2 Reference
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3
3 Abbreviations
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4
4
Technical requirements
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4
4.1. Schematic
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4
4.2. ZHP-r definition
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4
4.3. Electrical specification
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5
4.4. DC characteristic
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7
4.5. Test methodology
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7
4.5.1. Insertion loss
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7
4.5.2. Return loss
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8
5 Environmental condition
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9
5.1. Resistibility to overvoltage and
overcurrents
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9
5.2. Climatic condition
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9
5.2.1. Operating temperature
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9
5.2.2. Storage and transport
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9
5.2.3. Operating humidity
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9
6 Reliability conditions
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9
6.1.Thermal shock
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9
6.2. Temperature humidity exposure
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9
6.3. Vibration test
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9
7 Mechanical condition
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10
7.1. PCB dimension
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10
Page 3
Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 3 OF 10
1. Introduction:
The CPF118F is a splitter module that has been specifically designed to implement the
functionality of low pass filter in POTS over ADSL application.
Asymmetric Digital Subscriber Line (ADSL) technology is dedicated , point to point , public
network access technology that allow multiple forms of data , voice , and video to be carried
over twisted-pair copper wire on the local loop between a network service provider’s(NSP’S)
central office and the customer site or on local loops created either intra-building or intracampus. Best of all , ADSL delivers this high speed performance over existing copper
telephone line all while allowing traditional voice service to coexist without interruption
through POTS low pass filters. The POTS-splitter on the customer premises side consists
of a lowpass section.
The CPF118F integrate low pass filter that block the high frequency energy from reaching
the POTS device and provide isolation from impedance effects of the POTS device on
ADSL.In addition , these filter will also attenuate any wideband impulse noise generated by
the POTS device due to the interruption of loop current(e.g. pulse dialing or on hook / off
hook transfer) Because the POTS splitter connects directly to the subscriber loop media , it
must also provide some protection for externally induced line hits or faults which could
damage any attached equipment or endanger humans interacting with the installed
equipment. The circuit protection will be provided mostly by standard central office line
protection means and additional protection measures built into POTS splitter to protect
against line overstress which could damage the splitter itself. The electrical and
transmission specification is based on ETSI TR 101 728 .
2. Reference:
Ref. 1 : ETS 300 019 Environmental conditions and environmental tests for
Telecommunications equipment
Ref. 2 : ETSI 101 728 Network and Customer Installation
Ref. 3 : ITU-T K21 Resistibility of subscribers terminal to overvoltages
and overcurrents.
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 4 OF 10
3. Abbreviations:
ADSL Asymmetric Digital Subscriber Line
CO Central Office
CPE Customer Premise Equipment.
POTS Plain Old Telephone Service
RT Remote Terminal
ADSL-NT Network termination of ADSL
4. Technical requirements :
4.1.Schematic :
The following drawing illustrates the schematic of this product.
4.2. ZHP-r definition :
To facilitate the test of the splitter,the high pass data have to be taken into consideration.
Capacitors of 0.1uF on the NT-side are connected in series with 0.12uF capacitors in the
tip-And ring-line of the ADSL-output of the splitter itself(see block diagram above). The
equivalent circuit diagram of the NT-side is shown below :
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 5 OF 10
4.3. Electrical specification :
The low pass filter shall satisfy the following parametric limits with a complex impedance ZL
shown in this table across the Line side of this device . The following requirement is
specified for a single splitter.
Electrical requirements
Splitter parameter
Range values
Frequency range
Splitter bandwidth DC to 3.4KHz
Nominal voice band 0.3KHz to 3.4KHz
Billing tone 12KHz±80Hz
Ringing frequency 15.3Hz to 68Hz
ADSL band 30KHz to 1104KHz
Line Impedance ZL 270ohm + (750ohm || 150nF)
CO impedance ZTc 270ohm + (750ohm || 150nF)
RT impedance ZTr 270ohm + (750ohm || 150nF)
Modem impedance 30KHz< f< 1104KHz 100 ohm
Operation voltage voice band
Nominal signal 21mVpp to 5.4 Vpp
Billing tone 10Vpp to 30.2Vpp
Ringing signal 25Hz 100Vrms
DC voltage 45V to 52V
Max. AC voltage 150Vrms with -105VDC offset
Max. differential 320V
Current voice band
Loop current <=80mA
DC Resistance
DC Resistance <=50 ohm
Isolation resistance tip/ring >5 Mohm
Voice –band characteristic
Insertion loss(ZR / 600 ohm) 1004Hz <1.0 dB
Attenuation distortion(relative to
1004Hz)
200Hz<f<4KHz <±1.0 dB
300Hz<f<600Hz <250 usecDelay distortion
600Hz<f<3200Hz <200 usec
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 6 OF 10
Electrical requirements
Splitter parameter
Range values
3200Hz<f<4000Hz <250 usec
Splitter parameter Range values ADSL Phone Line
300Hz<f<3400Hz >=12dB Z
ADSL
Z
SL
Z
SL
3400Hz<f<4000Hz >=8dB Z
ADSL
Z
SL
Z
SL
300Hz<f<3400Hz >=12dB Z
ADSL
Z
R
Z
R
Return loss from POTS port
3400Hz<f<4000Hz >=8dB Z
ADSL
Z
R
Z
R
300Hz<f<3400Hz >=12dB Z
ADSL
Z
SL
Z
SL
3400Hz<f<4000Hz >=8dB Z
ADSL
Z
SL
Z
SL
300Hz<f<3400Hz >=12dB Z
ADSL
Z
R
Z
R
Return loss from Line port
3400Hz<f<4000Hz >=8dB Z
ADSL
Z
R
Z
R
30KHz to 1MHz >50 dBLongitudinal conversion loss LCL
1MHz to 5MHz >30 dB
ADSL modem interface
Isolation voltage >2000Vrms for 1 minute
ADSL band characteristic
ADSL Insertion loss 26-1100KHz <0.3 dB
Stop band attenuation 32KHz<f<1104KHz >55 dB
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 7 OF 10
4.4. DC characteristic :
All requirement of this specification can be met in the presence of all POTS loop currents
from 0mA to 80mA. This filter can pass POTS tip-to-ring dc voltages of 45 to 52V and
ringing signals of 100Vrms at any frequency from15.3Hz to 68Hz with a dc component in
the range from 45 to 52V. The dc resistance from tip-to-ring at the line port interface with the
phone interface shorted, shall be less than or equal to 50 ohms for one splitter. The DC
resistance from tip-to-ground and from ring-to-ground at the POTS interface with the U-C
interface open shall be greater than or equal to 5 Megohms. The ground point shall be local
building or green wire ground. As an objective , the dc resistance should exceed 20MΩ.
4.5. Test method :
4.5.1. Insertion loss :
The insertion loss of a device connected into a given transmission system is defined as the
ratio, expressed in dB, of the load power available(before and after insertion ) delivered to
the output network beyond the point of insertion at a given frequency. In general , the
insertion loss of a device inserted in a given transmission system mainly caused by internal
component resistive loss while all of the impedance between source , load and device
interface having been matched. To perform the insertion loss measurement ,thru calibration
must be done prior the testing . General Insertion loss equation can be expressed as
following.
Insertion loss = 20 log V2 / V1 dB where
V1 = the measured voltage value of load without LPF in circuit.
V2 = the measured voltage value of load with LPF in circuit.
The test setup is shown in drawing below. :
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 8 OF 10
4.5.2. Return loss :
Return loss measure the amount of energy that is lost due to reflection which resulted
from impedance mismatching at the interface. Return loss is essentially defined as the
ratio of the power incident upon a given transmission system to the power reflected
caused by impedance mismatch with respect to reference impedance at the interface
between source and device. Return loss figure are a function of the impedance of the
circuit involved and are therefore frequency dependent. These impedance must be
closely maintained in order to reduce the possibility of undesirable reflection and
echoes which in long distance circuit the telephone user or destroy the data being sent.
To perform the return loss test ,open ,short, load calibration must be done prior
measurement while the LCZ impedance Analyzer being selected in impedance mode.
Return loss is general expressed in decibels.
General Return loss equation as below:
Return loss = 20 log Z
Load
+ ZM / Z
Load
- ZMdB
Where Z
Load
= the reference impedance ZM = the measured impedance
The test setup is shown in drawing below :
Note:
Z
Load
defined :
ZR=270 ohm+(750ohm//150nf)
ZSL=82 ohm+(600ohm//68nf)
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 9 OF 10
5. Environmental condition:
5.1. Resistibility to overvoltages and overcurrents:
The splitter has to comply with requirements as per ITU-T K.21.
5.2. Climatic conditions:
5.2.1. Operating temperature:
Application indoor
Long time operation guarantee temperature ( 5 to 40 0C )
Short time operation guarantee temperature ( 0 to 50 0C )
( According to ETS 300 019, class 3.2 )
5.2.2. Storage and transport:
Low ambient temperature - 20 0C
High ambient temperature +85 0C
( According to MIL-STD-202 method 107 )
5.2.3. Operation humidity:
Long time operation guarantee humidity ( 5 to 85 % )
Short time operation guarantee humidity ( 5 to 90 % )
Short time : within 72 continuous hours and 15 days in a year
6. Reliability conditions:
6.1. Thermal shock :
Temperature from -20 °C to +85 °C for 5 cycles
(According to MIL-STD-202 , method 107)
6.2. Temperature humidity exposure :
+50 °C /95RH , 96hrs
(According to MIL-STD-202 , method 103)
6.3. Vibration test :
Random vibration , frequency 5-500Hz , sweep time :1 hr / axis /
Force : 2.4grams (According to MIL-STD-202 , method 204)
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Product Specification
CPF118F
Data sheet subject to change without notice RDPS-POTS414(R0)09/10/2002
SHEET 10 OF 10
7. Mechanical Condition :
7.1. Mechanical :
Note :
(1) all tolerance : ± 0.25mm ( 0.001 ) inch
(2) color code for case:91H301B0
(3) Unit : mm
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