ITU-T Q 931 AMD 1-2002 ISDN user-network interface layer 3 specification for basic call control SERIES Q SWITCHING AND SIGNALLING Digital subscriber Signalling System No 1 C Networ.pdf

《ITU-T Q 931 AMD 1-2002 ISDN user-network interface layer 3 specification for basic call control SERIES Q SWITCHING AND SIGNALLING Digital subscriber Signalling System No 1 C Networ.pdf》由会员分享，可在线阅读，更多相关《ITU-T Q 931 AMD 1-2002 ISDN user-network interface layer 3 specification for basic call control SERIES Q SWITCHING AND SIGNALLING Digital subscriber Signalling System No 1 C Networ.pdf（26页珍藏版）》请在麦多课文档分享上搜索。

1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.931TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(12/2002) SERIES Q: SWITCHING AND SIGNALLING Digital subscriber Signalling System No. 1 Network layerISDN user-network interface layer 3 specification for basic call control Amendment 1: Exte

2、nsions for the support of digital multiplexing equipment ITU-T Recommendation Q.931 (1998) Amendment 1 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FL

3、OWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEM No. 4 Q.120Q.139 SPECIFICATIONS OF SIGNALLING SYSTEM No. 5 Q.140Q.199 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.250Q.309 SPECIFICATIONS OF SIGNALLING SYSTEM R1 Q.310Q.3

4、99 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 General Q.850Q.919 Data link layer Q.920Q

5、.929 Network layer Q.930Q.939 User-network management Q.940Q.949 Stage 3 description for supplementary services using DSS1 Q.950Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS

6、 FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) i ITU-T Recommendation Q.931 ISDN user-ne

7、twork interface layer 3 specification for basic call control Amendment 1 Extensions for the support of digital multiplexing equipment Summary This amendment contains the modifications to ITU-T Rec. Q.931 (05/98) in order to accommodate the needs of DME signalling and to correct an editorial error in

8、 the coding of the Bearer capability information element. Appendix III is added to provide typical DME control procedures. NOTE This amendment takes into account Erratum 1 to Q.931 (05/1998) which corrects the editorial error for the coding of octet 5d (bit 1) of the V.32 Bearer capability informati

9、on element in Table 4-6/Q.931. Source Amendment 1 to ITU-T Recommendation Q.931 (1998) was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 December 2002. ii ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) FOREWORD The International Telecommunication Unio

10、n (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 responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to st

11、andardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is

12、 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 collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to

13、indicate both a telecommunication administration and a recognized operating agency. 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 no position conce

14、rning 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 property, protected by pa

15、tents, 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 2003 All rights reserved. No part of this publication may be reproduced, by a

16、ny means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) iii CONTENTS Page 1) Table 4-3. 1 2) Figure 4-11 . 2 3) Table 4-6. 3 4) New Appendix III. 10 5) Revised Appendix IV . 12 ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) 1 ITU-T Recommendation Q.931 ISDN

17、 user-network interface layer 3 specification for basic call control Amendment 1 Extensions for the support of digital multiplexing equipment 1) Table 4-3 Add a new information element for DME signalling as follows: Table 4-3/Q.931 Information element identifier coding Reference subclause Maximum le

18、ngth (octets) (Note 1) Bits 8 7 6 5 4 3 2 1 0 : : : : : : : Variable length information element: 0 0 1 1 0 1 1 Coding decoding processing Appendix III (Note 4) 2 ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) 2) Figure 4-11 Apply corrections to Figure 4-11/Q.931 as follows: 8 7 6 5 4 3 2 1 Octet Bearer cap

19、ability information element identifier 0 0 0 0 0 1 0 0 1 Length of the bearer capability contents 2 ext. 1 Coding standard Information transfer capability 3 ext. 1 Transfer mode Information transfer rate 4 ext. 1 Rate multiplier 4.1* (Note 1) ext. Layer 1 ident. User information layer 1 protocol 5*

20、0/1 0 1 ext. 0/1 Synch./ asynch Negot. User rate 5a* (Note 2) ext. 0/1 Intermediate rate NIC on Tx NIC on Rx Flow control on Tx Flow control on Rx Spare 0 5b* (Note 3) ext. 0/1 Hdr/ no Hdr Multiframe Mode LLI negot. Assignor/ee In-band neg. Spare 0 5b* (Note 4) ext. 0/1 Number of stop bits Number of

21、 data bits Parity 5c* (Note 2) ext. 1 Duplex mode Modem type 5d* (Note 2) ext. Layer 2 ident. User information layer 2 protocol 6* 1 1 0 ext. Layer 3 ident. User information layer 3 protocol 7* 0 0/1 1 1 ext. Spare Additional layer 3 protocol information 7a* 0 0/1 0 0 0 (most significant bits) (Note

22、 5) ext. Spare Additional layer 3 protocol information 7b* 1 0 0 0 (most significant bits) (Note 5) NOTE 1 This octet is required if octet 4 indicates multirate (64 kbit/s base rate). Otherwise, it shall not be present. NOTE 2 This octet may be present if octet 3 indicates unrestricted digital infor

23、mation and octet 5 indicates either of the ITU-T standardized rate adaptions V.110, I.460 and X.30 or V.120 9. It may also be present if octet 3 indicates 3.1 kHz audio and octet 5 indicates G.711. NOTE 3 This structure of octet 5b only applies if octet 5 indicates ITU-T standardized rate adaption (

24、see Recommendations V.110 7, I.460 15 and X.30 8). NOTE 4 This structure of octet 5b only applies if octet 5 indicates ITU-T standardized rate adaption (see Recommendation V.120 9). NOTE 5 This octet may be included if octet 7 indicates ISO/IEC TR 9577 (Protocol Identification in the network layer).

25、 Figure 4-11/Q.931 Bearer capability information element ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) 3 3) Table 4-6 Modify Table 4-6/Q.931 as follows: Table 4-6/Q.931 Bearer capability information element Coding standard (octet 3) Bits 7 6 0 0 ITU-T standardized coding as described below 0 1 ISO/IEC Sta

26、ndard (Note 1) 1 0 National standard (Note 1) 1 1 Standard defined for the network (either public or private) present on the network side of the interface (Note 1) NOTE 1 These other coding standards should be used only when the desired bearer capability cannot be represented with the ITU-T-standard

27、ized coding. Information transfer capability (octet 3) Bits 5 4 3 2 1 0 0 0 0 0 Speech 0 1 0 0 0 Unrestricted digital information 0 1 0 0 1 Restricted digital information 1 0 0 0 0 3.1 kHz audio 1 0 0 0 1 Unrestricted digital information with tones/announcements (Note 2) 1 1 0 0 0 Video All other va

28、lues are reserved. NOTE 2 Unrestricted digital information with tones/announcements (UDI-TA) is the new information transfer attribute value that had previously been named “7 kHz audio“ in Recommendation Q.931 (1988). Transfer mode (octet 4) Bits 7 6 0 0 Circuit mode 1 0 Packet mode All other values

29、 are reserved. Information transfer rate (octet 4 , bits 5 to 1) Bits 5 4 3 2 1 Circuit mode Packet-mode0 0 0 0 0 This code shall be used for packet-mode calls 1 0 0 0 0 64 kbit/s 1 0 0 0 1 2 64 kbit/s 1 0 0 1 1 384 kbit/s 1 0 1 0 1 1536 kbit/s 1 0 1 1 1 1920 kbit/s 1 1 0 0 0 Multirate (64 kbit/s ba

30、se rate) All other values are reserved. 4 ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) Table 4-6/Q.931 Bearer capability information element NOTE 3 When the information transfer rate 2 64 kbit/s is used, the coding of octets 3 and 4 refer to both 64 kbit/s channels. NOTE 4 Additional attributes are defin

31、ed in Table 4-7. Rate multiplier (octet 4.1) NOTE 5 Coded as a binary representation of the multiplier to the base rate. The multiplier can take any value from 2 up to the maximum number of B-channels available on the interface. User information layer 1 protocol (octet 5) Bits 5 4 3 2 1 0 0 0 0 1 IT

32、U-T standardized rate adaption V.110, I.460 and X.30. This implies the presence of octet 5a and optionally octets 5b, 5c and 5d as defined below 0 0 0 1 0 Recommendation G.711 10 -law 0 0 0 1 1 Recommendation G.711 A-law 0 0 1 0 0 Recommendation G.721 11 32 kbit/s ADPCM and Recommendation I.460 0 0

33、1 0 1 Recommendations H.221 and H.242 0 0 1 1 0 Recommendations H.223 92 and H.245 93 0 0 1 1 1 Non-ITU-T standardized rate adaption. This implies the presence of octet 5a and, optionally, octets 5b, 5c and 5d. The use of this codepoint indicates that the user rate specified in octet 5a is defined b

34、y the user. Additionally, octets 5b, 5c and 5d, if present, are defined in accordance with the user specified rate adaption 0 1 0 0 0 ITU-T standardized rate adaption V.120 9. This implies the presence of octets 5a and 5b as defined below, and optionally octets 5c and 5d 0 1 0 0 1 ITU-T standardized

35、 rate adaption X.31 14 HDLC flag stuffing 0 1 0 1 0 Recommendation G.728 98 LD-CELP (Note 7) 0 1 0 1 1 Recommendation G.729 99 CS-ACELP (Note 7) All other values are reserved. NOTE 6 If the transfer mode is “circuit mode“, and if the information transfer capability is “unrestricted digital informati

36、on“ or “restricted digital information“, and if the user information layer 1 protocol is to be identified only to the addressed entity octet 5 shall be omitted. If the transfer mode is packet mode, octet 5 may be omitted. Otherwise, octet 5 shall be present. NOTE 7 These codings can only be used in

37、ISUP 100 User Service Information Parameter Synchronous/Asynchronous (octet 5a) Bit 7 0 Synchronous data 1 Asynchronous data NOTE 78 Octets 5b-5d may be omitted in the case of synchronous user rates. Negotiation (octet 5a) Bit 6 0 In-band negotiation not possible 1 In-band negotiation possible NOTE

38、89 See Recommendations V.110 7, I.460 15 and X.30 8 or modem type Recommendation. ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) 5 Table 4-6/Q.931 Bearer capability information element User rate (octet 5a) Bits 5 4 3 2 1 0 0 0 0 0 For I.460, rate is specified by bits 7, 6 of octet 5b, intermediate rate. Fo

39、r V.110 and X.30, rate is indicated by E-bits (synchronous data only) or may be negotiated in-band. For V.120, rate is unspecified or may be negotiated in-band. 0 0 0 0 1 0.6 kbit/s Recommendation X.1 17 0 0 0 1 0 1.2 kbit/s 0 0 0 1 1 2.4 kbit/s Recommendation X.1 0 0 1 0 0 3.6 kbit/s 0 0 1 0 1 4.8

40、kbit/s Recommendation X.1 0 0 1 1 0 7.2 kbit/s 0 0 1 1 1 8 kbit/s Recommendation I.460 0 1 0 0 0 9.6 kbit/s Recommendation X.1 0 1 0 0 1 14.4 kbit/s 0 1 0 1 0 16 kbit/s Recommendation I.460 0 1 0 1 1 19.2 kbit/s 0 1 1 0 0 32 kbit/s Recommendation I.460 0 1 1 0 1 38.4 kbit/s Recommendation V.110 87 0

41、 1 1 1 0 48 kbit/s Recommendations X.1 0 1 1 1 1 56 kbit/s 1 0 0 1 0 57.6 kbit/s Recommendation V.14 extended 88 1 0 0 1 1 28.8 kbit/s Recommendation V.110 89 1 0 1 0 0 24 kbit/s Recommendation V.110 89 1 0 1 0 1 0.1345 kbit/s Recommendation X.1 1 0 1 1 0 0.100 kbit/s Recommendation X.1 1 0 1 1 1 0.

42、075/1.2 kbit/s Recommendation X.1 (Note 910) 1 1 0 0 0 1.2/0.075 kbit/s Recommendation X.1 (Note 910) 1 1 0 0 1 0.050 kbit/s Recommendation X.1 1 1 0 1 0 0.075 kbit/s Recommendation X.1 1 1 0 1 1 0.110 kbit/s Recommendation X.1 1 1 1 0 0 0.150 kbit/s Recommendation X.1 1 1 1 0 1 0.200 kbit/s Recomme

43、ndation X.1 1 1 1 1 0 0.300 kbit/s Recommendation X.1 1 1 1 1 1 12 kbit/s All other values are reserved. NOTE 910 The first rate is the transmit rate in the forward direction of the call. The second rate is the transmit rate in the backward direction of the call. 6 ITU-T Rec. Q.931 (1998)/Amd.1 (12/

44、2002) Table 4-6/Q.931 Bearer capability information element Octet 5b for V.110, I.460 and X.30 rate adaption Intermediate rate (octet 5b) Bits 7 6 0 0 Not used 0 1 8 kbit/s 1 0 16 kbit/s 1 1 32 kbit/s Network Independent Clock (NIC) on transmission (Tx) (octet 5b) (Note 1011) Bit 5 0 Not required to

45、 send data with network independent clock 1 Required to send data with network independent clock NOTE 1011 Refers to transmission in the forward direction of the call. NOTE 1112 See Recommendations V.110 7, I.460 15 and X.30 8. Network Independent Clock (NIC) on reception (Rx) (octet 5b) (Note 1213)

46、 Bit 4 0 Cannot accept data with network independent clock (i.e. sender does not support this optional procedure). 1 Can accept data with network independent clock (i.e. sender does support this optional procedure). NOTE 1213 Refers to transmission in the backward direction of the call. NOTE 1314 Se

47、e Recommendations V.110 7, I.460 15 and X.30 8. Flow control on transmission (Tx) (octet 5b) (Note 1415) Bit 3 0 Not required to send data with flow control mechanism 1 Required to send data with flow control mechanism NOTE 1415 Refers to transmission in the forward direction of the call. NOTE 1516

48、See Recommendations V.110, I.460 and X.30. Flow control on reception (Rx) (octet 5b) (Note 1617) Bit 2 0 Cannot accept data with flow control mechanism (i.e. sender does not support this optional procedure) 1 Can accept data with flow control mechanism (i.e. sender does support this optional procedu

49、re) NOTE 1617 Refers to transmission in the backward direction of the call. NOTE 1718 See Recommendations V.110, I.460 and X.30. ITU-T Rec. Q.931 (1998)/Amd.1 (12/2002) 7 Table 4-6/Q.931 Bearer capability information element Octet 5b for V.120 9 rate adaption Rate adaption header/no header (octet 5b) Bit 7 0 Rate adaption header not included 1 Rate adaption header included Multiple frame establishment support in d