1、 ETSI TR 103 000-4-1 V1.1.1 (2003-06)Technical Report Access and Terminals (AT);Analogue Access to Public Network;Advisory Notes to Standards harmonizing terminal interface;Part 4: Information arising from CEC decisions;Sub-part 1: General loop steady state requirementsETSI ETSI TR 103 000-4-1 V1.1.
2、1 (2003-06) 2 Reference DTR/AT-010113 Keywords access, analogue, interface, PSTN, POTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de
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6、by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2003. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON
7、logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TR 103 000-4-1 V1.1.1 (2003-06) 3 Contents Intellectual Property Rights4 Foreword.4 Intr
8、oduction 4 1 Scope 5 2 References 5 3 Definitions5 4 General loop steady state requirements5 4.1 Background information.5 4.2 DC characteristics.5 4.3 Other requirements.7 4.3.1 Loop current characteristics7 4.3.2 General loop steady state requirements 7 4.4 Test methods 8 4.5 Advisory notes8 Histor
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12、 Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Access and Terminals (AT). The present document is part 4 of a multi-part deliverable covering the standards harmonizing terminal interface, as identified below: Part 1: “List of all Advisory Notes“; Part 2: “Generall
13、y applicable Advisory Notes“; Part 3: “Country Specific Advisory Notes;“ Part 4: “Information arising from CEC decisions“: Sub-part 1: “General loop steady state requirements“. Introduction The present document is applicable to all Terminal Equipment within the scope of TBR 021 1 and EN 301 437 3. E
14、TSI ETSI TR 103 000-4-1 V1.1.1 (2003-06) 5 1 Scope The present document gives guidance on the application of TBR 021 and is, therefore, applicable to Terminal Equipment falling within the scope of TBR 021. The present document deals with the changes in the loop steady states requirement arising from
15、 the Commission Decision of 26 May 2000 L135/25 2. 2 References For the purposes of this Technical Report (TR) the following references apply: 1 ETSI TBR 021(1998): “Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Ne
16、tworks (PSTNs) of TE (excluding TE supporting the voice telephony service) in which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signalling“. 2 Commission Decision of 26 May 2000 L135/25 concerning the request by France to maintain pursuant to Article 18(3) of Dir
17、ective 1999/5/EC of the European Parliament and of the Council (the “R Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE supporting the voice telephony service in which network addressing, if provided, is by means of Dua
18、l Tone Multi Frequency (DTMF) signalling“. 4 ETSI EG 201 121:“A guide to the application of TBR 21“. 3 Definitions For the purposes of the present document, the terms and definitions given in TBR 021 1 apply. 4 General loop steady state requirements 4.1 Background information The Commission Decision
19、 of 26 May 2000 L135/25 2 allowed the continuation of the requirement for terminals to limit the DC current to 60 mA for a period of 30 months starting April 8 2000. As this period expired on October 8 2002 a number of changes are required in TBR 021 and EN 301 437 3. 4.2 DC characteristics Clause 4
20、.7.1 of TBR 021 requires terminals to limit the DC current to 60 mA for a given range of feeding conditions as shown in table 1 and figure 1 as reproduced below. The original table 5 and figure 5 of TBR 021 are now no longer applicable and should be replaced by the new table 2 and figure 2. ETSI ETS
21、I TR 103 000-4-1 V1.1.1 (2003-06) 6 Table 1: Original table 5 of TBR 021 TE voltage/current characteristics Point Voltage (V) Current (mA) A 9,0 0 B 9,0 20,0 C 14,5 42,0 D 40,0 50,0 E 40,0 60,0 F 0 60,0 G 0 0 NOTE: Limits for intermediate currents can be found by drawing a straight line between the
22、break points on a linear voltage/current scale. 09,014,506020 42 I (mA)U(V)ABCDEF40Not to scale50GFigure 1: Original figure 5 of TBR 021 TE voltage/current characteristics Table 2: New table 5 of TBR 021 TE voltage/current characteristics Point Voltage (V) Current (mA) A 9,0 0 B 9,0 20,0 C 14,5 42,0
23、 D 40,0 50,0 NOTE: Limits for intermediate currents can be found by drawing a straight line between the break points on a linear voltage/current scale. ETSI ETSI TR 103 000-4-1 V1.1.1 (2003-06) 7 Figure 2: New figure 5 of TBR 021 TE voltage/current characteristics 4.3 Other requirements 4.3.1 Loop c
24、urrent characteristics In clause 4.6.2 of TBR 021 table 4 the 230 feeding resistance should be changed to a 400 and If1 and If2 should change from 49,6 to 47,2 as shown below. Table 3: Original table 4 of TBR 021 TE current characteristics with feeding resistors which are used during the loop steady
25、 state Condition Requirements Feeding voltage Feeding resistance Time (ms) Current (mA) Vf Rf t1-t0 t2-t01 t3-t01 If1 If2 50 VDC 3,2 k 30 500 1 200 13,1 12,8 50 VDC 230 20 500 1 200 49,6 49,6 Table 4: New table 4 of TBR 021 TE current characteristics with feeding resistors which are used during the
26、loop steady state Condition Requirements Feeding voltage Feeding resistance Time (ms) Current (mA) Vf Rf t1-t0 t2-t01 t3-t01 If1 If2 50 VDC 3,2 k 30 500 1 200 13,1 12,8 50 VDC 400 20 500 1 200 47,2 47,2 4.3.2 General loop steady state requirements In clause 4.7 of TBR 021 the 230 feeding resistor sh
27、ould be changed to a 400 feeding resistor. ETSI ETSI TR 103 000-4-1 V1.1.1 (2003-06) 8 4.4 Test methods The test method for TBR 021 and EN 301 437 3specify a 230 feeding resistor for the highest current feed condition, this could result in damage of terminals that are not current limiting. Therefore
28、 it is necessary to change the 230 feeding resistor in the clauses shown in table 5 to a 400 feeding resistor. Table 5: Clauses of TBR 021 eeding 400 resister A.4.4.3 A.4.4.4 A.4.6.2 A.4.7.1 A.4.7.2 A.4.7.3.1 A.4.7.3.2 A.4.7.3.3 A.4.7.3.4.1 A.4.7.3.4.2 A.4.7.4.1 A.4.7.4.2 A.4.7.5 A.4.8.2.2 A.4.8.2.3
29、 4.5 Advisory notes In many of the requirements and test methods in the advisory notes listed in EG 201 121 4 DC characteristics are specified which include the 60 mA current limitation and test conditions using a 230 feeding resistance. It is not possible to change these advisory notes at present b
30、ut it is suggested that they be applied using the same feeding condition as described in the present document and that 60 mA current limitation requirement be removed. NOTE: In each case the relevant authority should be consulted for final confirmation of such changes. ETSI ETSI TR 103 000-4-1 V1.1.1 (2003-06) 9 History Document history V1.1.1 June 2003 Publication
