ITU-T H 248 34-2005 Gateway control protocol Stimulus analogue line package SERIES H AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services – Communication proce.pdf

1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.248.34TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2005) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Stimulus analogue line package ITU-T Recommendation H.2

2、48.34 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H

3、.259 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia services H.36

4、0H.369 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboration applications and ser

5、vices H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND AND TRIPLE-PLAY

6、MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. H.248.34 (01/2005) i ITU-T Recommendation H.248.34 Gateway control protocol: Stimulus analogue line package Summary This Recommendation describes

7、a Stimulus Analogue Line package that defines new H.248 events, signals and parameters derived from the V5 PSTN protocol defined in ITU-T Rec. G.964. To assist both vendors and operators in migrating V5 Local Exchange and access network nodes to a Next Generation Network Media Gateway and Media Gate

8、way Controller architecture, the package provides guidelines for mapping the V5 PSTN Protocol to the “Stimulus Analogue line“ package, other H.248 packages and the H.248.1 protocol. Source ITU-T Recommendation H.248.34 was approved on 8 January 2005 by ITU-T Study Group 16 (2005-2008) under the ITU-

9、T Recommendation A.8 procedure. ii ITU-T Rec. H.248.34 (01/2005) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is respon

10、sible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the IT

11、U-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborativ

12、e basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mand

13、atory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The

14、 use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes

15、 no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual propert

16、y, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2005 All rights reserved. No part of this publication may b

17、e reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. H.248.34 (01/2005) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Normative references 1 2.2 Informative references 1 3 Definitions 1 4 Abbreviations 2 5 Stimulus Analogue Line Package. 2 5.1 Properties 2

18、 5.2 Events . 3 5.3 Signals 8 5.4 Statistics 11 5.5 Procedures 11 Appendix I V5 to H.248 mapping overview. 21 ITU-T Rec. H.248.34 (01/2005) 1 ITU-T Recommendation H.248.34 Gateway control protocol: Stimulus analogue line package 1 Scope The Stimulus Analogue Line package defines H.248 signals and ev

19、ents that are exchanged between a MG and a MGC for controlling analogue POTS lines which can, for example, be used to host telephones, analogue PBXs and turn-key systems. The signals and events defined in the package are stimulus in nature and enable the full set of POTS services that are delivered

20、via a V5 LE and AN to be ubiquitously provided in a NGN MG and MGC architecture. NOTE The use of the Call Finished signal is a national option. It is included as part of joint text with ETSI. In normal circumstances, national specific functionality shall be included as a separate package. The use of

21、 Call Finished shall not compromise existing H.248 procedures. 2 References 2.1 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editio

22、ns indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid

23、ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation ITU-T Recommendation G.964 (2001), V-interfaces at the digital local exchange (LE) V5.1 interface (based on 2048 kbit/s) fo

24、r the support of access network (AN). ITU-T Recommendation G.965 (2001), V-interfaces at the digital local exchange (LE) V5.2 interface (based on 2048 kbit/s) for the support of access network (AN). ITU-T Recommendation H.248.1 (2002), Gateway control protocol: Version 2, plus Corrigendum 1 (2004).

25、ITU-T Recommendation H.248.8 (2002), Gateway control protocol: Error code and service change reason description, plus Amendment 1 (2004), New error code 458 (Unexpected Event/RequestID). ITU-T Recommendation H.248.23 (2005), Gateway control protocol: Enhanced alerting packages. ITU-T Recommendation

26、H.248.26 (2003), Gateway control protocol: Enhanced analogue lines packages, plus Amendment 1 (2005). 2.2 Informative references SSPE/SPEC/001-1 V5 (July 1998), UK PSTN Mapping Requirements, Issue 2. 3 Definitions This Recommendation uses the following terms and definitions: 3.1 V5: A general term f

27、or the family of V interfaces for connection of ANs to the LE, e.g., a V5.1 interface or a V5.2 interface. 2 ITU-T Rec. H.248.34 (01/2005) 3.2 AN: A system implemented between the local exchange (LE) and user, replacing part or the whole of the local line distribution network. 3.3 LE: An exchange on

28、 which user lines are terminated via an AN. 4 Abbreviations This Recommendation uses the following abbreviations: AN Access Network BCC Bearer Channel Connection LE Local Exchange MG Media Gateway MGC Media Gateway Controller NGN Next Generation Network PBX Private Branch Exchange POTS Plain Old Tel

29、ephone Service PSTN Public Switched Telephone Network TDM Time Division Multiplex 5 Stimulus Analogue Line Package Package Name: Stimulus Analogue Line Package PackageID: stimal (0x0093) Description: This package defines all the stimulus events and signals necessary for controlling an analogue line.

30、 This analogue line package is different from other H.248 analogue line packages, because the analogue signals and events that are exchanged between the MGC and the MG are stimulus rather than functional in nature. The stimulus approach enables the MG to be transparent to the underlying service bein

31、g delivered by the MGC and also does not unduly restrict the types of services that may be delivered to an analogue line. The H.248 signals and events have been derived from the V5 PSTN protocol signals defined in ITU-T Rec. G.964. This approach enables the MGC to support the same type of services a

32、nd capabilities as the existing PSTN network. NOTE Unlike an AN as defined in ITU-T Rec. G.964/G.965, an H.248 MG has the capability to detect in-band (e.g., DTMF) signals, generate local tones and announcements and generate FSK tones for caller display purposes. Control of these capabilities is pro

33、vided by other packages in the H.248 series of Recommendations. The stimulus analogue line package is a superset package that defines the full repertoire of signals and events. A particular PSTN national authority may support a subset of the signals, events and parameters listed in the package. Vers

34、ion: 1 Extends: none 5.1 Properties none. ITU-T Rec. H.248.34 (01/2005) 3 5.2 Events 5.2.1 Steady Signal Event Name: Steady Signal Event ID: stedsig (0x0001) Description: Activation of the “Steady Signal“ event results in either all the steady signals that are supported by the MG being reported to t

35、he MGC, or a list of specified steady signals being reported by the MG to the MGC. The former functionality is achieved by excluding the Events Descriptor parameter “Signal to Detect“ when the event descriptor is activated. The latter functionality is achieved by including the Events Descriptor para

36、meter “Signal to Detect“ when the Events Descriptor is activated. The actual steady signal that is reported to the MGC is identified by the ObservedEventsDescriptor parameter “Detected Signal“. The default recognition time of a particular steady signal may be modified via the Events Descriptor param

37、eter “Recognition Time“. 5.2.1.1 EventsDescriptor parameters 5.2.1.1.1 Signal to Detect Parameter Name: Signal to Detect ParameterID: detectsig (0x0001) Description: This parameter indicates to the MG the type of steady signals that are to be recognized by the MG. If this parameter is excluded, then

38、 all steady signals that are recognized by the MG are detected and subsequently reported via the ObservedEvents Descriptor. If this parameter is included, then only the specified list of steady signals are detected and subsequently reported via the ObservedEvents Descriptor. Type: sub-list of Enumer

39、ation Optional: yes Possible values: See Table 1 below for a list of steady signal parameter names and values. Default: all steady signals 4 ITU-T Rec. H.248.34 (01/2005) Table 1/H.248.34 Steady signal parameter names and values Text encoding Binary encoding “normalPolarity“ (0x0000) “reversePolarit

40、y“ (0x0001) “batteryOnC-wire“ (0x0002) “noBatteryOnC-wire“ (0x0003) “offHook“ (0x0004) “onHook“ (0x0005) “batteryOnA-wire“ (0x0006) “aWireonEarth“ (0x0007) “noBatteryOnA-wire“ (0x0008) “noBatteryOnB-wire“ (0x0009) “reducedBattery“ (0x000a) “noBattery“ (0x000b) “alternateReducedPower“ (0x000c) “norma

41、lBattery“ (0x000d) “stopRinging“ (0x000e) “startPilotFrequency“ (0x000f) “stopPilotFrequency“ (0x0010) “lowImpedanceonB-wire“ (0x0011) “b-wireConnectedtoearth“ (0x0012) “b-wireDisconnectedfromearth“ (0x0013) “batteryOnB-wire“ (0x0014) “lowLoopImpedance“ (0x0015) “highLoopImpedance“ (0x0016) “anomalo

42、usLoopImpedance“ (0x0017) “a-wireDisconnectedfromearth“ (0x0018) “c-wireOnearth“ (0x0019) “c-wireDisconnectedfromearth“ (0x001a) “rampToReversePolarity“ (0x001d) “rampToNormalPolarity“ (0x001e) 5.2.1.1.2 Recognition Time Parameter Name: Recognition Time ParameterID: rectime (0x0002) Description: Thi

43、s parameter is included if the default recognition time of a steady signal is to be modified. Type: integer Optional: yes ITU-T Rec. H.248.34 (01/2005) 5 Possible values: Any positive value in milliseconds. Default: provisioned default for each steady signal 5.2.1.2 ObservedEventsDescriptor paramete

44、rs 5.2.1.2.1 Detected Signal Parameter Name: Detected Signal ParameterID: sig (0x0001) Description: This parameter returns the detected steady signal. Type: enumeration Optional: no Possible values: See Table 1 for a list of steady signal parameter names and values. Default: none 5.2.2 Line Informat

45、ion Event Name: Line Information Event ID: lineinfo (0x0002) Description: The line information is used to transmit specific information on the subscriber line status to the MGC. 5.2.2.1 EventsDescriptor parameters none. 5.2.2.2 ObservedEventsDescriptor parameters 5.2.2.2.1 Line Information Parameter

46、 Name: Line Information ParameterID: info (0x0001) Description: This parameter indicates that the status of the subscriber line has changed. Type: enumeration Optional: no Possible values: See Table 2 for a list of line information parameter names and values. Default: none 6 ITU-T Rec. H.248.34 (01/

47、2005) Table 2/H.248.34 Line info parameter names and values Text encoding Binary encoding “impedanceMarkerReset“ (0x0000) “impedanceMarkerSet“ (0x0001) “lowLoopImpedance“ (0x0002) “anomalousLoopImpedance“ (0x0003) “anomalousLineCondition“ (0x0004) 5.2.3 Pulsed Signal Event Name: Pulsed Signal Event

48、ID: pulsedsig (0x0003) Description: Activation of the “Pulsed Signal“ event results in either all the pulsed signals that are supported by the MG being reported to the MGC, or a list of specified pulsed signals being reported by the MG to the MGC. The former functionality is achieved by excluding th

49、e event descriptor parameter “Signal to Detect“ when the Events Descriptor is activated. The latter functionality is achieved by including the Events Descriptor parameter “Signal to Detect“, when the Events Descriptor is activated. The actual pulsed signal that is reported to the MGC is identified by the ObservedEventsDescriptor parameter “Detected Signal“. The default recognition time of a particular pulsed signal may be modified via the Events Descriptor parameter “Recognition Time“. 5.2.3.1 EventsDescriptor para