YCL CPF121F Datasheet
Product Specification
CPF121F
Data sheet subject to change without notice RDPS-POTS438(R1)12/25/2002
SHEET 1 OF 14
File No RDPS-POTS438
Revision R1
System Application Asymmetric Digital Subscriber Line
Product Type POTS Splitter
Product Name CPF121F
Date Dec. 25th, 2002
Sundi Lin - Design Engineer, R&D_1Issued By
Sundi@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
CPF121F
Data sheet subject to change without notice RDPS-POTS438(R1)12/25/2002
SHEET 2 OF 14
Table of contents
Item Description Page
1 Introduction
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3
2 Reference
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4
3 Abbreviations
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4
4
Technical requirements
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5
4.1. Schematic
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5
4.2. ZHP-r definition
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5
4.3. Electrical specification
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6
4.4. Z
ADSL
defined
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9
4.5. ZR and ZRL defined ( clause 5.2.2 )
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10
4.6. Z
RHF
defined ( clause 5.2.3 )
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10
4.7. Zon defined ( clause 5.2.4 )
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10
4.8. Test method
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11
4.8.1. Insertion loss
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11
4.8.2. Return loss
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12
5 Environmental condition
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13
5.1. Resistibility to overvoltage and
overcurrents
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13
5.2. Climatic condition
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13
5.2.1. Operating temperature
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13
5.2.2. Storage and transport
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13
5.2.3. Operating humidity
13
6 Reliabilty conditions
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13
6.1.Thermal shock
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13
6.2. Temperature humidity exposure
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13
6.3. Vibration test
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13
7 Mechanical condition
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14
7.1. Mechanical
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14
Product Specification
CPF121F
Data sheet subject to change without notice RDPS-POTS438(R1)12/25/2002
SHEET 3 OF 14
1. Introduction:
The CPF121F 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(installed in aseparated plastic box).
The CPF121F 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 and castomer requird .
Product Specification
CPF121F
Data sheet subject to change without notice RDPS-POTS438(R1)12/25/2002
SHEET 4 OF 14
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 K44
Resistibility test for telecommunication to overvoltages and overcurrents
Ref. 4 : ITU-T K21
Resistibility of subscribers terminal to overvoltage and overcurrents
Ref. 5 : ETSI TS 101 952-1-1
Specifications of the olw pass part of ADSL / POTS splitters
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
1
Product Specification
CPF121F
Data sheet subject to change without notice RDPS-POTS438(R1)12/25/2002
SHEET 5 OF 14
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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