Datasheet CPF105G Datasheet (YCL)

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

SHEET 1 OF 11

File No RDPS-POTS281
Revision R1
System Application Asymmetric Digital Subscriber Line
Product Type POTS Splitter
Product Name CPF105G
Date Apr. 30th, 2002

Kevin Lee - Design Engineer, R&D_1Issued By

[e-mail]

Roger Wu – Manager, R&D_1Approved By

[e-mail]

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.

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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Table of contents

Item Description Page

1. Introduction ----------------------------------------------- 3

2. Reference ----------------------------------------------- 3

3. Abbreviations ----------------------------------------------- 4

4. Technical requirements ----------------------------------------------- 4

4.1. Schematic ----------------------------------------------- 4

4.2. Electrical specification ----------------------------------------------- 5

4.3. ZHP-r Definition ----------------------------------------------- 7

4.4. DC characteristic ----------------------------------------------- 7

4.5. Test method: ----------------------------------------------- 8

4.5.1. Insertion loss ----------------------------------------------- 8

4.5.1. Return loss ----------------------------------------------- 9

5. Environmental condition ----------------------------------------------- 10

5.1. Resistibility to overvoltage and
overcurrents

----------------------------------------------- 10

5.2. Climatic condition

----------------------------------------------- 10

5.2.1. Operating temperature

----------------------------------------------- 10

5.2.2. Storage and transport

----------------------------------------------- 10

5.2.3. Operating humidity

----------------------------------------------- 10

6. Reliability conditions ----------------------------------------------- 10

6.1.Thermal shock

----------------------------------------------- 10

6.2. Temperature humidity exposure

----------------------------------------------- 10

6.3. Vibration test

----------------------------------------------- 10

7. Mechanical condition ----------------------------------------------- 11

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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1. Introduction:

The CPF105G 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 intra-campus. 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(installed in a separated plastic box.

The CPF105G 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.

2. Reference:

Ref. 1 : ETS 300 001 Attachment to Public Switched Telephone Network
Ref. 2 : AS/ACIF S002 : 2001 Analogue inter working and non-interference

requirements for Customer Equipment for connector
to the Public switched Telephone Network
Ref. 3 : ITU-T K20 Resistibility of telecommunication switching

equipment to overvoltages and overcurrents
Ref. 4 : ITU-T K21 Resistibility of subscribers terminal to overvoltage

and overcurrents

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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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 illustrate the block diagram of this product.

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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4.2. 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 parameters

Range Values

Frequency range

Nominal voice band 0.3KHz to 3.4KHz
Ringing frequency

22Hz ±28Hz
ADSL band 30KHz to 1104KHz
Line Impedance ZL

220ohm + (820ohm || 115nF)
CO impedance ZTc

220ohm + (820ohm || 115nF)
RT impedance ZTr 220ohm + (820ohm || 115nF)
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

40Vrms to 80Vrms(113Vpp to

227 Vpp)
DC voltage 0V to -72V

Max. AC voltage 70Vrms with -72VDC offset
Max. differential 190V

Current voice band

Loop current <120mA
Transient current(on/off hook) <400mA

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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Electrical requirements

Splitter parameters

Range Values

DC Resistance

DC Resistance <=25 ohm
Isolation resistance tip/ring >5 Mohm

Voice –band characteristic

Insertion loss 1004Hz <1.5 dB
Attenuation distortion(relative to 200Hz<f<3.4KHz <3.5dB
1004Hz)
Delay distortion 200Hz<f<4KHz 150u sec
Return loss 300Hz< f< 2000Hz >=15 dB

2000Hz< f< 3.4KHz >=12 dB

3.4KHz< f< 10KHz >=8 dB

Longitudinal conversion loss LCL 600Hz to 3.4KHz >=45 dB

ADSL modem interface

Isolation voltage >2000Vrms for 1 minute

ADSL band characteristic

Stop band attenuation 30KHz >18 dB

100KHz<f<300KHz >30 dB
300KHz<f<1104KHz >40 dB

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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4.3. 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 :

4.4. DC characteristic:

All requirement of this specification can be met in the presence of all POTS loop currents
from 0mA to 120mA. This in line filter can pass POTS tip-to-ring dc voltages of 0V to 105V
and ringing signals of 40 V to 150 Vrms at any frequency from15.3Hz to 68Hz with a dc
component in the range from 0V to 105V. The DC resistance from tip-to-ring at the line port
interface with the phone interface shorted, shall be less than or equal to 25 ohms for one
splitter. The DC resistance from tip-to-ground and from ring-to-ground at the POTS
interface with the U-R interface open shall be greater than or equal to5 Megohms. The
ground point shall be local building or green wire ground. As an objective , the DC esistance
should exceed 10MΩ.

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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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 :

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

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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  ZL + ZM / ZL - ZMdB Where ZL = the reference impedance
ZM = the measured impedance

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

SHEET 10 OF 11

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)

Product Specification

CPF105G

Data sheet subject to change without notice RDPS-POTS281(R1)04/30/2002

SHEET 11 OF 11

7. Mechanical condition :