1、ETSI ES 200 778-1 1.2.2 (2002-11) ETSI Standard Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Protocol over the local loop for display and related services; Terminal equipment requirements; Part 1 : On-hook data transmission 2 ETSI ES 200 778-1 VI .2.2 (
2、2002-1 1) Reference DESIAT-030015 Keywords access, analogue, CLIP, local loop, protocol, PSTN, supplementary service ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif
3、enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:lwmv.etsi .arq The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in
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5、ocument may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at ha p:/pa rta I. etsi I a rgltbistat uslstatus .as p If you find errors in the present document, send your comment to: Cori vriaht Notifica tion No part may be re
6、produced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2002. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Me
7、mbers. TIPHONTM and the TIPHON 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 3 ETSI ES 200 778-1 VI . 2.2 (2002-1 1) Contents Intellectual
8、Property Rights 5 1 Scope 6 2 References 6 3 Definitions and abbreviations . 6 3.1 Definitions . . . 6 3.2 Abbreviations . . 7 4 . 7 4.1 General requirements . 7 4.1.1 Idle state . . 7 4.1.2 Polarity . . 8 4.1.3 AC termination . 8 4.1.4 DC termination . 8 4.1.5 Data signals . 8 4.1.5.1 Frequencies .
9、 8 4.1.5.2 Rate . 8 4.1.5.3 Levels . . . 8 4.1.5.4 Unwanted signals . 9 4.1.6 Timing requirements . 9 4.1.6.1 Start time 4.1.6.2 9 4.1.6.3 ure not received 9 9 4.1.6.5 Timeout - loss of carrier 9 10 4.2 Alerting method specific requirements . 10 4.2.1 Data transmission associated with ringing 10 4.2
10、.1.1 Prior to ringin 10 4.2.1.1.1 Dual Tone Signal (DT-AS) . 10 4.2.1.1.2 Ringing Pulse Alerting Signal (RP-AS) 11 4.2.1.1.3 LR + DT-AS . 11 4.2.1.2 Data transmissio g ringing 12 12 4.2.3 TE alerting signals 12 4.2.3.1 Dual Tone Alerting Signal (DT-AS) . 12 4.2.3.2 Ringing Pulse Alerting Signal (RP-
11、AS) require 12 4.2.4 Timer requirements . 13 5 Datalink layer - data reception . 13 5.1 Channel seizure . 5.2 Mark signal 5.3 Message type . . . 13 5.4 Message length . . 13 Checksum . . 13 Presentation layer - message interpretation 14 Electro Magnetic Compatibility (EMC) . 14 Annex A (normative):
12、DTMF based subscriber line protocol 15 A.2 Definitions 15 Foreword . 5 Physical layer requirements 7 4.1.6.4 4.1.6.6 Timeout - message type byte not received Ringing arrival in the idle line signalling state Data transmission not associated with ringing 4.2.2 . 13 . 13 5.5 6 7 Safety 14 8 . A 1 Intr
13、oduction 15 ETSI 4 ETSI ES 200 778-1 VI .2.2 (2002-1 1) A.3 Requirements. .15 15 A.3.1 General . . 15 A.3.1.1 Requirements in all conditions except the DIT state . 15 A.3.1.2 Requirements in the DIT state . . 16 A.3.1.3 Additional requirements in all conditions . A.3.1.4 Optional requirements relate
14、d to parallel tY 16 16 A.3.2 Establishing the DIT state . 16 A.3.2.1 Transition to the DIT state . 16 A.3.2.2 DC resistance in the DIT state . . 16 A.3.2.3 AC impedance in the DIT state . . 16 A.3.3 DTMF code reception in the DIT state . . 16 A.3.4 End ofthe DIT state . . 16 A.3.4.1 Leaving the DIT
15、state . . 17 A.3.4.2 Criteria for leaving the DIT state History .18 . . ETSI 5 ETSI ES 200 778-1 VI .2.2 (2002-1 1) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any,
16、 is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 314: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on th
17、e ETSI Web server (5). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become,
18、essential to the present document. Foreword This ETSI Standard (ES) has been produced by ETSI Technical Committee Access and Terminals (AT). The present document is part 1 of a multi-part deliverable covering the Protocol over the local loop for display and related services; Terminal equipment requi
19、rements, as identified below: Part 1: “On-hook data transmission“; Part 2: “Off-hook data transmission“; Part 3 : “Protocol Implementation Conformance Statement (PICS) proforma specification; On-Hook and Off-Hook“; Part 4: Part 5: “Test Suite Structure and Test Purposes (TSS On-Hook and Off-Hook“; “
20、Abstract Test Suite (ATS) and partial Protocol Implementation extra Information for Testing (PIXIT) proforma specification for the user; On-Hook and Off-Hook“. The present document replaces EN 300 778-1 which has been withdrawn. There are no technical differences between the present document and the
21、 former EN 300 778-1. There are, however, editorial differences e.g. ES 200 778-1 does not include the test procedures because they are are now included in ES 200 778-3, ES 200 778-4 and ES 200 778-5. ETSI 6 ETSI ES 200 778-1 VI .2.2 (2002-1 1) 1 Scope The present document specifies the electrical c
22、haracteristics and the functional characteristics for Terminal Equipment (TE) for connection to the network termination points of a Public Switched Telephone Network (PSTN) interface providing a Protocol over the local loop for display and related services based on the protocols defined in EN 300 65
23、9-1 i and EN 300 659-3 3. For those networks that have implemented a Dual Tone Multi Frequency (DTMF) based subscriber line protocol, network specific TE requirements apply (see annex A). The present document applies to on-hook data transmission only. The requirements are intended to ensure correct
24、reception and detection of the received data. The method of displaying the received data is not defined. 2 Re fe re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date
25、 of publication andor edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. il ETSI EN 300 659-1: “Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (
26、PSTN); Subscriber line protocol over the local loop for display (and related) services; Part 1 : On-hook data transmission“. ETSI ES 201 235 (all parts): “Specification of Dual Tone Multi-Frequency (DTMF) Transmitters and Receivers“. 21 31 ETSI EN 300 659-3: “Access and Terminals (AT); Analogue acce
27、ss to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services; Part 3: Data link message and parameter codings“. ETSI TR 101 182: “Analogue Terminals and Access (ATA); Definitions, abbreviations and symbols“. 41 3 3.1 Definitions
28、and abbreviations De fi nit ions For the purposes of the present document, the terms and definitions given in EN 300 659-1 i and EN 300 659-3 3 and the following apply: idle line signalling state: state into which the TE when connected to the network, is placed such that it is capable of receiving o
29、r sending speechband signalling without entering the loop state idle state: Also known as the on-hook state, off-line state or the quiescent state, see TR 101 182 4. loop state: Also known as the on-line state or off-hook state, see TR 101 182 4. off-hook state: See loop state. on-hook state: See id
30、le state. quiescent state: See idle state. ETSI 7 ETSI ES 200 778-1 VI .2.2 (2002-1 1) ringing state: idle state into which a ringing signal is applied twist: level difference between different frequencies in a signal 3.2 Abbreviations For the purposes of the present document, the abbreviations defi
31、ned in EN 300 659-1 i and EN 300 659-3 3 and the following apply: NTP Network Termination Point 4 Physical layer requirements TE Alerting Signal received (4.1.6.1) End of data transmission (4.1.6.2) Ringing signal received Ringing arrival from Figure 1: State diagram 4.1 Gen eral req u i re men ts 4
32、.1 .I Idle state There are no idle state requirements under the present document. Idle state requirements are given in relevant access standards. 4.1.2 Polarity All requirements in the present document shall be met independently of the polarity of the DC voltage applied to the line terminals of the
33、TE. ETSI 8 ETSI ES 200 778-1 VI .2.2 (2002-1 1) 4.1.3 AC termination The TE shall present one of the following AC conditions during the idle line signalling state: a) an impedance not less than 8 kQ, but with a phase angle not exceeding + 5“ over the frequency range 200 Hz to 4 O00 Hz; a return loss
34、 over the frequency range 1 O00 Hz to 2 500 Hz of not less than 10 dB with respect to a network comprising a resistor of 820 Q in series with a parallel combination of a 360 Q resistor and a 180 nF capacitor. b) 4.1.4 DC termination During the idle-line signalling state the TE shall present either o
35、f the following DC conditions to the network: a) b) the current drawn by the TE shall not exceed 0,5 mA at 50 V; the current drawn by the TE shall not exceed the current drawn by a 5 MQ resistor when connected to 100 V. 4.1.5 Data signals Data transmission to the TE is by means of the Frequency Shif
36、t Keying (FSK) method as specified in EN 300 659-1 i. 4.1 5.1 Frequencies The TE shall be capable of correctly receiving FSK signalling tones at the following frequencies: Mark = logical “1“ frequency: 1 300 Hz f 1,5 %. Space = logical “O“ frequency: 2 100 Hz f 1,5 %. 4.1 5.2 Rate The TE shall be ca
37、pable of correctly receiving FSK signalling tones at the rate of 1 200 bith f 1 %. 4.1 5.3 Levels The TE shall be capable of correctly receiving FSK signalling tones with levels within the range -8 dBV to -36 dBV, and with a twist between the mark and space tones not exceeding 6 dB. 4.1 5.4 Unwanted
38、 signals The TE shall correctly receive FSK signalling tones of correct frequency and level in the presence of unwanted voice band (300 Hz to 3 400 Hz) signals with a total power not exceeding a level 25 dB below the total power level of the FSK signalling during channel seizure. ETSI 9 ETSI ES 200
39、778-1 VI .2.2 (2002-1 1) 4.1.6 Timing requirements TAS Channel seizure Mark Data y 45 - I SIGNALLING 171 ms i LOAD DC AND AC (optional Idle lind signaling state . . + T2 T6 -L + nd i imq i Ringing or idle state - TE Idle state Figure 2: Timing illustration The values of timing parameters TO, T1, T2,
40、 T3, T4, T5 and T6 are defined in EN 300 659-1 I. 4.1.6.1 Start time The TE shall enter the idle-line signalling state and be ready to receive FSK data transmission within one or more of the following time periods measured from the end of the TAS or the fist ring pattern (see figure 2): a) b) 45 ms
41、when a TAS of type DT-AS or LR + DT-AS is used; 500 ms when a TAS of type RP-AS or alerting signal of type “fist ring pattern“ is used. 4.1.6.2 End time The TE shall leave the idle-line signalling state and revert to the idle state within 150 ms from when the FSK data transmission has been completel
42、y signalled (see figure 2). 4.1.6.3 Timeout - Channel seizure not received If Channel seizure signal is not received the TE shall revert to the idle state within 2,15 s from the end of the TAS. 4.1.6.4 Timeout - message type byte not received If a message type byte is not received the TE shall rever
43、t to the idle state within 2,15 s from the end of the channel seizure signal. 4.1.6.5 Timeout - loss of carrier Where the TE is subjected to a reduction of the FSK signal level to below -50 dBV following normal reception of a channel seizure, the TE shall revert to the idle state within 150 ms. ETSI
44、 10 ETSI ES 200 778-1 VI .2.2 (2002-1 1) 4.1.6.6 Ringing arrival in the idle line signalling state The TE shall leave the idle-line signalling state within 150 ms of receiving a ring burst when in idle line signalling state. 4.2 Alerting method specific requirements The TE shall enter an idle-line s
45、ignalling state in response to a TE Alerting Signal (TAS) or first ring pattern applied to the TE via the NTP, and shall leave the idle-line signalling state when the data transmission is completed (see figure 1). The TE should respond to one or more of the different ways of alerting mentioned in cl
46、auses 4.2.1.1,4.2.1.2 and 4.2.2. The values of timing parameters TO, T1, T2, T3, T4, T5 and T6 are defined in EN 300 659-1 i. Other timing parameters are defiied in clause 4.2.4, table 3 of the present document. 4.2.1 Data transmission associated with ringing 4.2.1 .I Prior to ringing 4.2.1.1.1 The
47、TE shall correctly detect a DT-AS type of TAS, shall enter idle-line signalling state within T, from the end of the TAS, and shall return to idle state within T, from the end of the data transmission. The characteristics of DT-AS are specified in table 1. Dual Tone Alerting Signal (DT-AS) NOTE: The
48、TE may receive different DT-AS from the network to identiSl other services not specified in the present document. DT-AS i T4 i Figure 3: DT-AS alerting signal ETSI 11 FSK data transmission ETSI ES 200 778-1 VI .2.2 (2002-1 1) First ring pattern - - 4.2. I. 1.2 The TE shall correctly detect a RP-AS t
49、ype of TAS, shall enter idle-line signalling state within T, from the end of the TAS, and shall return to idle state within Tres from the end of the data transmission. The characteristics of RP-AS are specified in table 2. Ringing Pulse Alerting Signal (RP-AS) NOTE: The RP-AS may cause unwanted bell tinkle, depending on the type of terminal. TR Tres , I. Figure 4: RP-AS alerting signal 4.2. I. 1.3 LR + DT-AS The TE shall correctly detect a LR + DT-AS type of TAS, shall enter idle-line signalling state within T, from the end of the TAS, a
