YCL CPF122F Datasheet
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.
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 Mechanical condition
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8
7.1. Mechanical
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8
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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