Page 1
Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 1 OF 8
File No RDPS-POTS445
Revision R1
System Application Asymmetric Digital Subscriber Line
Product Type POTS Splitter
Product Name CPF122F
Date Mar. 07rd, 2003
Feilong Chen - Design Engineer, R&D_1Issued By
feilong@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.
Page 2
Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 2 OF 8
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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6
5 Environmental condition
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7
5.1. Resistibility to overvoltage and
overcurrents
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7
5.2. Climatic condition
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7
5.2.1. Operating temperature
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7
5.2.2. Storage and transport
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7
5.2.3. Operating humidity
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7
6 Reliability conditions
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7
6.1.Thermal shock
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7
6.2. Temperature humidity exposure
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7
6.3. Vibration test
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7
7 Mechanical condition
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8
7.1. Mechanical
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8
Page 3
Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 3 OF 8
1. Introduction
The CPF122F is a splitter module that has been designed to implement the functionality of
low pass filter in POTS over ADSL application. The electrical specifications are based on
ETSI TS 101 952-1-1 v1.1.1 and customer requirements.
Asymmetric Digital Subscriber Line (ADSL) technology is dedicated, point to point, public
network access technology that allows 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 filter. The POTS splitter on the customer premises side consists of
a low pass section.
The CPF122F integrates low pass filter that blocks the high frequency energy from reaching
the POTS device and provide isolation from impedance effects of the POTS device on
ADSL. In addition, this 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/off hook
transfer). Because the POTS splitter connects to the subscriber loop media directly, 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
[1] ETSI 300 019: “Environmental conditions and environmental tests for
Telecommunications equipment”.
[2] ETSI TR 101 728: “Access and Terminals (AT); Study for the specification of low pass
filter section of POTS/ADSL splitters”.
[3] ETSI TS 101 952: “Access network xDSL transmission filters; Part1: ADSL splitters for
European deployment; Sub-part1: Specification of the low pass part of ADSL/POTS
splitters”.
[4] ITU-T K21: “Resistibility of Telecommunication Equipment Installed in Customer Premises
to Overvoltages and Overcurrents”.
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Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 4 OF 8
3. Abbreviations
ADSL Asymmetric Digital Subscriber Line
ATU-R ADSL Transmission Unit at Remote side
CO Central Office
CPE Customer Premise Equipment
POTS Plain Old Telephone Service
RT Remote Terminal
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 frequency signal has to be taken into
consideration. Capacitors of 0.1uF on the RT-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 ATU-R circuit diagram of the RT-side is shown below.
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Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 5 OF 8
4.3 Electrical specification
The low pass filter shall satisfy the following parametric requirements with corresponding
impedances shown in this table across terminals of this device. The following requirements
are specified for a single splitter.
Electrical requirements
Splitter parameter
Range Values
Impedance and Frequency range
Splitter bandwidth DC to 3.4kHz
Nominal voice band 0.3KHz to 3.4KHz
Ringing frequency 25Hz to 50Hz
ADSL band 30kHz to 1104kHz
Z
R
270Ω + (750Ω || 150nF)
Impedance at
voice band
Z
SL
82Ω + (600Ω || 68nF)
Impedance at ADSL band Z
RHF
120Ω + (150Ω || 47nF) +
(750Ω || 150nF)
On hook impedance Z
ON
10kΩ
Modem impedance 30kHz< f<1104kHz
100Ω
Operation voltage at voice band
Nominal signal 21mVpp to 5.4 V
P-P
Billing tone 3.53V
rms
Ringing signal 100V
rms
DC voltage 45V to 52V
Max. AC voltage 150V
rms
with -105VDC offset
Current at voice band
Off hook loop current 13mA~80mA
On hook loop current 0.4mA~2.5mA
Voice band characteristics
DC resistance to earth With 100VDC
>=20MΩ
Insulation resistance tip/ring With 100VDC
>=5MΩ
DC series resistance
<=50Ω
On hook insertion loss for high
impedance
200Hz<f<2.8kHz -4dB~+4dB
Insertion loss 1kHz <1.0dB
On hook for low
impedance
Distortion 200Hz<f<2.8kHz
<±1.0dB
1
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Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 6 OF 8
Electrical requirements
Splitter parameter
Range Values
Insertion loss 1kHz <1.0 dB
Off hook for Z
R
and 600Ω
Distortion 200Hz<f<4kHz
<±1.0 dB
300Hz<f<3.4kHz >=14dB
Off hook return loss of Z
R
3.4kHz<f<4kHz >=8dB
With and without
ATU-R
300Hz<f<3.4kHz >=12dB
Off hook return loss of Z
SL
3.4kHz<f<4kHz >=8dB
With and without
ATU-R
Metering pulse 12kHz 3dB~5dB max.
50Hz<f<600Hz >=46 dB
600Hz<f<3.4kHz >=52 dB
3.4kHz<f<4kHz >=46 dB
R=300Ω
4kHz<f<30kHz >=40 dB
30kHz<f<1104kHz >=50 dB
Longitudinal conversion loss LCL
1104kHz<f<5MHz >=30 dB
R=50Ω
25kHz >=36dBV
On-hook isolation
1104kHz >=51dBv
With –6dBV emf
Off-hook isolation 32kHz<f<1104kHz >=55dB
2nd harmonic >=57dB
Intermodulation distortion
3rd harmonic >=60dB
200Hz<f<600Hz
250µs
600Hz<f<3.2kHz
200µs
Group delay distortion
3.2kHz<f<4kHz
250µs
Peak of main lobe in frequency domain <=15kHz
Transient effect
Voltage in time domain <=2V
p-p
4.4 DC characteristic
All requirements 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 100V
rms
at frequency range 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 50Ω 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 5MΩ. The ground point shall be local
building or green wire ground. As an objective, the DC resistance should exceed 20MΩ.
Page 7
Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 7 OF 8
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)
Page 8
Product Specification
CPF122F
Data sheet subject to change without notice RDPS-POTS445(R1)03/07/2003
SHEET 8 OF 8
7. Mechanical Condition
7.1 Mechanical
Note:
1. Connect the Line side filter to the wall jack, the phone side filter to the telephone sets
and the DSL side filter to the ADSL modem.
2. Incorrect connection will significantly affect the performance and operation.
3. Unless otherwise specified, all tolerances are mm ( inch ) ± 0.25 ( 0.010 ).
4. Unit: mm
LINE
( RJ 11 Jack )
PHONE
( RJ 11 Jack )
DSL
( RJ 11 Jack )
1
RJ11RJ11 RJ11
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