专题篇CHENGMTUP消息格式

TUP消息格式 TABLE 3/Q.723 标题码分配Heading code allocation Message Group H1 H0 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 0000 Spare, reserved for national use FAM 0001 IAM IAI SAM SAO FSM 0010 GSM COT CCF BSM 0011 GRQ SBM 0100 ACM CHG UBM 0101 SEC CGC NNC ADI CFL SSB UNN LOS SST ACB DPN MPR EUM CSM 0110 ANU ANC ANN CBK CLF RAN FOT CCL CCM 0111 RLG BLO BLA UBL UBA CCR RSC GRM 1000 MGB MBA MGU MUA HGB HBA HGU HUA GRS GRA SGBa) SBAa) SGUa) SUAa) 1001 RESERVED CNM 1010 ACC Spare reserved for international 1011 and basic national use NSB 1100 MPM NCB 1101 OPR NUB 1110 SLB STB Spare, reserved for national use NAM 1111 MAL a) National option. Abbreviations used in Table 3/Q.723 ACB 接入拒绝Access barred signal ACC 自动拥塞控制信息Automatic congestion control information message ACM 地址全Address complete message (note) ADI 地址不全Address incomplete signal ANC 应答，计费Answer signal, charge ANN 应答，免费Answer signal, no charge ANU 应答，未说明Answer signal, unqualified BLA 闭塞证实Blocking-acknowledgement signal BLO 闭塞Blocking signal BSM 后向建立Backward set-up message CBK 挂机Clear-back signal CCF 导通故障Continuity-failure signal CCL 主挂机Calling party clear signal CCM 电路监视Circuit supervision message CCR 导通请求Continuity-check-request signal CFL 呼叫故障Call-failure signal CGC 电路群拥塞Circuit-group-congestion signal CHG 计费Charging message CLF 拆线Clear-forward signal CNM 电路网管理Circuit network management message group COT 导通Continuity signal CSM 呼叫监视Call supervision message DPN 数字电路不提供Digital path not provided signal EUM 扩充后向建立不成功Extended unsuccessful backward set-up information message FAM 后向地址Forward address message FOT 前向转移Forward-transfer signal FSM 前向建立Forward set-up message GRA 群复原证实Circuit group reset-acknowledgement message GRM 群监视Circuit group supervision messages GRQ 一般请求General request message GRS 电路群复原Circuit group reset message GSM 一般前向建立信息General forward set-up information message HBA 面向硬件的群闭塞证实Hardware failure oriented group blocking-acknowledgement message HGB 面向硬件的群闭塞Hardware failure oriented group blocking message HGU 面向硬件的群解闭Hardware failure oriented group unblocking message HUA 面向硬件的群解闭证实Hardware failure oriented group unblocking-acknowledgement message IAI 带附加信息的初始地址消息Initial address message with additional information IAM 初始地址消息Initial address message LOS 线路不工作Line-out-of-service signal MAL 恶意呼叫识别Malicious call identification signal MBA 面向维护的群闭塞证实Maintenance oriented group blocking-acknowledgement message MGB 面向维护的群闭塞Maintenance oriented group blocking message MGU 面向维护的群解闭Maintenance oriented group unblocking message MPR Misdialled trunk prefix MPM 计费脉冲Metre pulse message MUA 面向维护的群解闭证实Maintenance oriented group unblocking-acknowledgement message NNC 国内网拥塞National-network-congestion signal NAM 国内地区使用National area message NCB 国内呼叫监视National call supervision message NSB 国内后向建立成功National successful backward set-up message NUB 国内后向建立不成功National unsuccessful backward set-up message RAN 再振铃Reanswer signal RLG 释放监护Release-guard signal RSC 电路复原Reset-circuit signal SAM 后继地址消息Subsequent address message SAO 带一位信号的后继地址消息Subsequent address message with one signal SBA 软件产生的群闭塞证实Software generated group blocking-acknowledgement message SBM 成功的后向建立Successful backward set-up information message SEC 交换设备拥塞Switching-equipment-congestion signal SGB 软件产生的群闭塞Software generated group blocking message SGU 软件产生的群解闭Software generated group unblocking message SSB 用户忙（电的）Subscriber-busy signal (electrical) SLB 用户市忙Subscriber local busy signal STB 用户长忙Subscriber toll busy signal SST 发送专用信号音Send-special-information tone signal SUA 软件产生的群解闭证实Software generated group unblocking-acknowledgement UBA 解闭证实Unblocking-acknowledgement signal UBL 解闭Unblocking signal UBM 不成功的后向建立Unsuccessful backward set-up information message UNN 空号Unallocated-number signal Note – Each address complete message contains one of the following signals: – ADC 地址全、计费Address-complete, charge – ADN 地址全、免费Address-complete, no charge – ADX 地址全、投币Address-complete, coin box – AFC 地址全、空闲、计费Address-complete, charge subscriber free – AFN 地址全、空闲、免费Address-complete, no charge, subscriber free – AFX 地址全、空闲、投币Address-complete, coin box, subscriber free 3.2 Heading code H0 The heading code H0 occupies the 4-bit field following the label and is coded as follows: 0000 留作国内spare, reserved for national use 0001 前向地址消息forward address messages 0010 前向建立消息forward set-up messages 0011 后向建立请求消息backward set-up request messages 0100 成功的后向建立消息successful backward set-up information messages 0101 不成功的后向建立消息unsuccessful backward set-up information messages 0110 呼叫监视消息call supervision messages 0111 电路监视消息circuit supervision messages 1000 电路群监视消息circuit group supervision messages 1001 保留reserved 1010 电路网管理消息circuit network management messages 1011 reserved for international and basic national use reserved for national use 3.3 前向地址消息Forward address messages The following types of forward address messages are specified and are each identified by a different heading code H1: – Initial address message. – Initial address message with additional information. – Subsequent address message (with one or more address signals). – Subsequent address message with one (address) signal. 3.3.1 初始地址消息Initial address message The basic format of the initial address message is shown on Figure 3/Q.723. FIGURE 3/Q.723...[CCITT-35530] = 3 CM 编码格式如下The following codes are used in the fields of the initial address message. a) Label: see § 2 b) Heading code H0 is coded 0001 c) Heading code H1 is coded 0001 d) Calling party category bits F E D C B A 0 0 0 0 0 0 unknown source (Note 1) 0 0 0 0 0 1 operator, language French 0 0 0 0 1 0 operator, language English 0 0 0 0 1 1 operator, language German 0 0 0 1 0 0 operator, language Russian 0 0 0 1 0 1 operator, language Spanish 0 0 0 1 1 0 operator, language Chinese 0 0 1 0 0 0 operator, language Japanese 0 0 0 1 1 1 available to Administrations for selecting a particular language provided by mutual agreement 0 0 1 0 0 1 国内话务员，有插入功能 0 0 1 0 1 0 普通、长（国际）-长、长（国际）-市呼叫ordinary calling subscriber 0 0 1 0 1 1 优先、长（国际）-长、长（国际）-市、市-市呼叫calling subscriber with priority 0 0 1 1 0 0 data call 0 0 1 1 0 1 test call 0 0 1 1 1 0 spare 0 0 1 1 1 1 spare 0 1 0 0 0 0 普通、免费、市-长呼叫 0 1 0 0 0 1 普通、定期、市-长呼叫 0 1 0 0 1 0 普通、用户、立即、市-长呼叫 0 1 0 0 1 1 普通、打印机、立即、市-长呼叫 0 1 0 1 0 0 优先、免费、市-长呼叫 0 1 0 1 0 1 优先、定期、市-长呼叫 0 1 0 0 0 0 to 1 1 1 1 1 1 spare Note 1 – The calling party category 搖nknown source” is classified, for the time being, for basic national use. The use of this category in the international network is for further study. Note 2 – In national networks, code 001001 may be used to indicate that the calling party is a national operator. e) Spare The bits in this field are spare for international allocation. f) 消息表示语Message indicators bits B A: 地址性质表示语nature of address indicator 0 0 市话用户号码subscriber number 0 1 spare, reserved for national use 1 0 国内（有效）号码national (significant) number 1 1 国际号码international number bits D C: 电路性质表示语nature-of-circuit indicator 0 0 无卫星no satellite circuit in the connection 0 1 有卫星one satellite circuit in the connection 1 0 spare 1 1 spare bits FE: 导通检验表示语continuity-check indicator 0 0 不需要进行导通检验continuity-check not required 0 1 该段电路需要进行导通测试continuity-check required on this circuit 1 0 在前段电路进行了导通测试continuity-check performed on a previous circuit 1 1 spare bit G: 回声抑制装置表示语echo-suppressor indicator 0 去话半回声抑制器未包括outgoing half echo suppressor not included 1 包括去话半回声抑制器outgoing half echo suppressor included bit H: 国际来话表示语incoming international call indicator 0 非国际来话call other than international incoming 1 国际来话incoming international call bit I: 改发呼叫表示语redirected call indicator 0 非改发呼叫not a redirected call 1 改发呼叫redirected call bit J: 全数字通道表示语all-digital-path-required indicator 0 普通呼叫ordinary call 1 需要全数字通道digital path required bit K: 信令通道表示语signalling path indicator 0 任何通道any path 1 （前段）全部七号信令方式通道all signalling system No. 7 path bit L: spare Note – The spare indicator may be used, e.g., to provide the /A law conversion control, pending further study. g) 地址信号数量Number of address signals 二进制表示A code expressing in pure binary representation the number of address signals contained in the initial address message, except for the code 0000 to which the meaning 16 digits including ST signal is assigned. h) 地址信号Address signals 0000 digit 0 0001 digit 1 0010 digit 2 0011 digit 3 0100 digit 4 0101 digit 5 0110 digit 6 0111 digit 7 1000 digit 8 1001 digit 9 1010 spare 1011 code 11 1100 code 12 1101 spare 1110 spare 1111 ST The most significant address signal is sent first. Subsequent address signals are sent in successive 4-bit fields. i) 填充Filler In case of an odd number of address signals, the filler code 0000 is inserted after the last address signal. This ensures that the variable length field which contains the address signals consists of an integral number of octets. 3.3.2 带附加信息的初始地址信息Initial address message with additional information The basic format of the initial address message with additional information is shown in Figure 4/Q.723. FIGURE 4/Q.723... [CCITT 35541] = 3 CM 编码格式如下The following codes are used in the initial address message with additional information: a) Label: see § 2 b) Heading code H0 is coded 0001 c) Heading code H1 is coded 0010 d) Calling party category: [see § 3.3.1 d)] e) Message indicators: [see § 3.3.1 f)] f) Number of address signals: [see § 3.3.1 g)] g) Address signals: [see § 3.3.1 h)] h) 第一表示语八位位组First indicator octet bit A: 网络能力或用户性能信息表示语network capability or user facility information indicator 0 不包括 network capability or user facility information not included 1 包括network capability or user facility information included bit B: 闭合用户群信息表示语closed user group information indicator 0 未包括closed user group information not included 1 包括closed user group information included bit C: 附加主叫用户信息表示语additional calling party information indicator 0 未包括additional calling party information not included 1 包括additional calling party information included bit D: 附加路由信息表示语additional routing information indicator 0 未包括additional routing information not included 1 包括additional routing information included bit E: 主叫用户线标识表示语calling line identity indicator 0 未包括calling line identity not included 1 包括calling line identity included bit F: 原被叫地址表示语original called address indicator 0 未包括original called address not included 1 包括original called address included bit G: 计费信息表示语charging information indicator 0 未包括charging information not included 1 包括charging information included bit H: 备用spare, reserved for indicating the presence or absence of a second indicator octet i) Network capability or user facility information: spare, reserved for national use. (This optional field may be used in national applications to indicate specific network capabilities and/or user facility information.) j) 闭合用群信息Closed user group (CUG) information The basic format of the closed user group information field is shown in Figure 4a/Q.723. FIGURE 4a/Q.723... = 3 CM 编码格式如下The following codes are used in the subfields of the closed user group information field. – bits B A: CUG呼叫表示语CUG call indicator 0 0 普通呼叫ordinary call 0 1 成功检测successful check 1 0 去话接入允许outgoing access allowed 1 1 去话接入不允许outgoing access not allowed – bits C D: spare – Interlock code A code identifying the closed user group involved in the call. The nature of this code is for further study. k) Additional calling party information: for further study. (This optional field is of fixed length and will indicate additional information concerning the calling party, which is not carried by the calling party抯 category indicator.) l) Additional routing information: for further study. (This optional field is of fixed length and will indicate that the call has to be routed in some particular way, due for example to additional customer services.) m) 主叫用户线识别Calling line identity The basic format of the calling line identity field is shown in Figure 4b/Q.723. FIGURE 4b/Q.723... = 3 CM The following codes are used in the subfields of the calling line identity field. – Address indicators: bits B A: 地址性质表示语nature of address indicator 0 0 市话用户号码subscriber number 0 1 国内备用spare, reserved for national use 1 0 国内有效号码national significant number 1 1 国际号码international number bit C: 主叫用户线识别提供表示语calling line identity presentation indicator 0 未限制提供calling line identity presentation not restricted 1 限制提供calling line identity presentation restricted bit D: 主叫用户线识别不全表示语incomplete calling line identity indicator 0 未表示不全no indication 1 不全incomplete calling line identity – 地址信号数量Number of address signals bits D C B A 0 0 0 0 主叫用户线识别不可用calling line identity not available indicator 0 0 0 1 to 1 1 1 1 a code expressing in pure binary representation the number of address signals. · 主叫用户线地址信号Calling line address signals Each signal is coded as indicated in § 3.3.1 h) as applicable. n) 原被叫地址Original called address The basic format of the original called address field is shown in Figure 4c/Q.723. FIGURE 4c/Q.723... = 3 CM The following codes are used in the subfields of the original address field: – Address indicator bits B A: 地址性质表示语nature of address indicator 0 0 subscriber number 0 1 spare, reserved for national use 1 0 national significant number 1 1 international number bits D C: spare – 地址信号数量Number of address signals bits D C B A 0 0 0 0 原被叫地址不可用original called address not available 0 0 0 0 to 1 1 1 1 a code expressing in pure binary representation the number of address signals. – Original called address signals Each signal is coded as indicated in § 3.3.1 h) as applicable. o) Charging information: for further study. (This optional field will contain information to be sent to a successive exchange for charging and/or accounting purposes.) 3.3.3 初始地址消息Subsequent address message The basic format of the subsequent address message (SAM) is shown in Figure 5/Q.723. FIGURE 5/Q.723...[CCITT 35550] = 3 CM The following codes are used in the fields of the subsequent address message: a) Label: see § 2 b) Heading code H0 is coded 0001 c) Heading code H1 is coded 0011 d) Address signal is coded as indicated in § 3.3.1 h) as applicable e) Number of address signals: a code expressing in pure binary representation the number of address signals contained in the subsequent address message. 3.3.4 带一位信号的初始地址消息Subsequent address message with one signal The basic format of the subsequent address message with one signal is shown in Figure 6/Q.723. FIGURE 6/Q.723...[CCITT 35560] = 3 CM The following codes are used in the fields of the subsequent address message with one signal: a) Label: see § 2 b) Heading code H0 is coded 0001 c) Heading code H1 is coded 0100 d) Address signal is coded as indicated in § 3.3.1 h) as applicable. 3.4 前向建立消息Forward set-up messages The following types of forward set-up messages are specified and are each identified by a different heading code H1: – general forward set-up information message, – continuity-check message. Unallocated H1 codes in this message group are spare. 3.4.1 一般前向建立消息General forward set-up information message The basic format of the general forward set-up information message is shown in Figure 7/Q.723. FIGURE 7/Q.723..[CCITT 85940] = 3 CM The following codes are used in the fields of the general forward set-up information message: a) Label: see § 2 b) Heading code H0 is coded 0010 c) Heading code H1 is coded 0001 d) 响应类型表示语Response type indicator bit A: 主叫用户类别表示语calling party category indicator 0 未包括calling party category not included 1 包括calling party category included bit B: 主叫用户线识别表示语calling line identity indicator 0 未包括calling line identity not included 1 包括calling line identity included bit C: 来话中继和转接交换局标识表示语incoming trunk and transit exchange: identity indicator 0 未包括incoming trunk and transit exchange identity not included 1 包括incoming trunk and transit exchange identity included bit D: 原被叫地址表示语original called address indicator 0 未包括original called address not included 1 包括original called address included bit E: 去话回声抑制器表示语outgoing echo suppressor indicator 0: 未包括outgoing half echo suppressor not included 1: 包括outgoing half echo suppressor included bit F: 恶意呼叫识别表示语malicious call identification indicator 0 不提供malicious call identification not provided 1 提供malicious call identification provided bit G: 保持表示语hold indicator 0 不提供保持hold not provided 1 提供保持hold provided bit H: spare e) 主叫用户类别Calling party category: bits F E D C B A 0 0 0 0 0 0 主叫用户类别信息不可用unknown source/calling party category unavailable indicator 0 0 0 0 0 1 to 1 1 1 1 1 1 (see § 3.3.1 d) f) 主叫用户线识别Calling line identity: Format and codes are the same as used in the calling line identity contained in the initial address message with additional information (see § 3.3.2). g) 来话中继和转接交换局标识表示语Incoming trunk and transit exchange identity: The basic format of the incoming trunk and transit exchange identity field is shown in Figure 8/Q.723. GURE 8/Q.723... = 3 CM The following codes are used in the subfields of the incoming trunk and transit exchange identity field: – 识别类型表示语Identity type indicator bits B A: 0 0 spare 0 1 信令点编码signalling point code 1 0 主叫用户线表示的可用部分available part of calling line identity 1 1 spare bits D C: spare – 交换局识别长度表示语Exchange identity length indicator 当转接交换局识别为主叫用户线表示的可用部分时，以二进制表示地址信号数量，包含在转接局标识子字段。A code expressing in pure binary representation the number of address signals included in the transit exchange identity subfield for the case when part of the calling line identity is used for this purpose. 当转接交换局识别由交换局信令点编码标识时（BA=01），此段编码为0000。When the transit exchange is identified by the signalling point code, this subfield is coded 0000. – 转接交换局识别Transit exchange identity 编码由下列组成A code consisting of either: i) 交换局信令点编码，或the signalling point code of the exchange, or ii) 主叫用户线标识的一部分，此时按§ 3.3.1 h)编码a part of the calling line identity, in which case each address digit contained in this identity is coded as indicated in § 3.3.1 h) where applicable. – 字段长度表示语Field length indicator 0000表示不提供来话中继识别标识。否则以二进制表示八位位组的长度。A code indicating in pure binary representation the number of octets in the incoming trunk identity field. Code 0000 indicates that the incoming trunk identity is not provided. – 来话中继标识Incoming trunk identity A code contained in a maximum of 15 octets, identifying the incoming trunk. The encoding of the incoming trunk identity is for further study.目前国内要求做为终端局时，按十六进制打印，为不影响呼叫，各交换局对该字段不予判别。 h) 原被叫地址Original called address See § 3.3.2 n). 3.4.2 导通测试Continuity-check message The basic format of the continuity-check message is shown in Figure 9/Q.723. FIGURE 9/Q.723...[CCITT 35570] = 3 CM The following codes are used in the fields of the continuity-check message: a) Label: see § 2 b) Heading code H0 is coded 0010 c) Heading code H1 contains signal codes as follows: 0011 导通信号（COT）continuity signal 0100 导通失败（CCF）continuity-failure signal 3.5 后向建立请求Backward set-up request message The following type of backward set-up request message is specified and is identified by one of the heading codes H1. The other H1 codes in this message group are spare. 3.5.1 一般请求General request messagexe "General request message" The basic format of the general request message is shown in Figure 10/Q.723. FIGURE 10/Q.723...[CCITT 35570] = 3 CM The following codes are used in the fields of the general request message: a) Label: see § 2 b) Heading code H0 is coded 0011 c) Heading code H1 is coded 0001 d) 请求类型表示语Request type indicators bit A: 主叫用户类别请求表示语calling party category request indicator 0 未请求no calling party category request 1 请求calling party category request bit B: 主叫用户线请求表示语calling line identity request indicator 0 未请求no calling line identity request 1 请求calling line identity request bit C: 原被叫地址请求original called address request 0 未请求no original called address request 1 请求original called address request bit D: 恶意呼叫识别表示语malicious call identification indicator (national option) 0 未遇到恶意呼叫识别no malicious call identification encountered 1 遇到恶意呼叫识别malicious call identification encountered bit E: 呼叫保持请求表示语hold request indicator 0 未请求保持hold not requested 1 请求保持hold requested bit F: 回声抑制器请求表示语echo suppressor request indicator 0 未请求no outgoing half echo suppressor requested 1 请求outgoing half echo suppressor requested bit GH: spare 3.6 Successful backward set-up information messages The following types of successful backward set-up information messages are specified and are each identified by a different heading code H1: – 地址全消息address-complete message – 计费消息charging message. 3.6.1 地址全Address-complete message The basic format of the address-complete message is shown in Figure 11/Q.723. FIGURE 11/Q.723...[CCITT 35580] = 3 CM The following codes are used in the fields of the address-complete message: a) Label: see § 2 b) Heading code H0 is coded 0100 c) Heading code H1 is coded 0001 d) 消息表示语Message indicators bits B A: 地址全信息表示语type of address-complete signal indicators 0 0 地址全address-complete signal 0 1 地址全、计费address-complete signal, charge 1 0 地址全、免费address-complete signal, no charge 1 1 地址全、投币address-complete signal, payphone bit C: 用户空闲表示语subscriber-free indicator 0 未表示no indication 1 用户空闲subscriber-free bit D: 来话回声抑制器表示语incoming echo suppressor indicator 0 未包括来话回声抑制器no incoming half echo suppressor included 1 包括来话回声抑制器incoming half echo suppressor included bit E: 呼叫前转表示语call forwarding indicator 0 呼叫未前转call not forwarded 1 呼叫前转call forwarded bit F: 信令通道表示语signalling path indicator 0 任何通道any path 1 全七号通道all signalling system No. 7 path bits G H: spare, for national use (may be used to indicate call redirection, holding of the connection or the end-to-end signalling method to be used). Note – The address-complete signal without qualification is classified for the time being in the basic national category of signals. The use of this signal in the international network is for further study. 3.6.2 计费信息Charging message (see Note) The basic format of the charging message is shown in Figure 12/Q.723. FIGURE 12/Q.723...[CCITT 35585] = 3 CM The following codes are used in the fields of the charging message: a) Label: see § 2 b) Heading code H0 is coded 0100 c) Heading code H1 is coded 0010 d) Charging information (Possible formats and codes of the charging information field are shown in Annex A.) Note – The charging message is classified, for the time being, in the basic national category of messages. The use of this message in the international network is for further study. 3.6.3 计费脉冲信息Meter pulse message a) Heading code H0 is coded 1100 b) Heading code H1 is coded 0001 c) Charging information（16BITS） 计费信息以二进制表示单位计费时间内（两次MPM之间）的脉冲数。 3.7 不成功的后向建立消息Unsuccessful backward set-up information messages 3.7.1 简单的后向建立不成功消息Simple unsuccessful backward set-up information message The basic format of the simple unsuccessful backward set-up information message is shown in Figure 13/Q.723. FIGURE 13/Q.723...[CCITT 35570] = 3 CM The following codes are used in the fields of the simple unsuccessful backward set-up information message. a) Label: see § 2 b) Heading code H0 is coded 0101 c) Heading code H1 contains signal codes as follows: 0000 spare 0001 交换设备拥塞switching-equipment-congestion signal 0010 交换电路拥塞circuit-group-congestion signal 0011 国内交换网拥塞national-network-congestion signal 0100 地址不全address-incomplete signal 0101 呼叫故障call-failure signal 0110 用户忙（电的）subscriber-busy signal (electrical) 0111 空号unallocated-number signal 1000 线路不工作line-out-of-service signal 1001 发送专用信息音send-special-information-tone signal 1010 接入拒绝access barred signal 1011 不提供数字通道digital path not provided signal 1100 misdialled trunk prefix signal (for national use) 1100 spare 3.7.2 国内后向建立不成功消息Simple unsuccessful backward set-up information message d) Heading code H0 is coded 1110 e) Heading code H1 contains signal codes as follows: 0001 用户市话忙Subscriber local busy signal 0010 用户长话忙Subscriber toll busy signal 3.7.3 扩展的后向建立不成功消息Extended unsuccessful backward set-up information message The basic format of the extended unsuccessful backward set-up information message is shown in Figure 13a/Q.723. FIGURE 13a/Q.723...[CCITT 85960] = 3 CM The following codes are used in the fields of the extended unsuccessful backward set-up information message: a) Label: see § 2 b) Heading code H0 is coded 0101 c) Heading code H1 contains signal code 1111 d) Octet indicator bits D C B A: 不成功表示语unsuccessful indicator 0 0 0 0 spare 0 0 0 1 用户忙subscriber busy 0 0 1 0 to 1 1 1 1 Spare bits H G F E: spare e) 信令点编码Signalling point code The point code of the signalling point in which the message is originated. 3.8 呼叫监视消息Call supervision message The basic format of the call supervision message is shown in Figure 14/Q.723. FIGURE 14/Q.723...[CCITT 35570] = 3 CM The following codes are used in the fields of the call supervision message: a) Label: see § 2 b) Heading code H0 is coded 0110 c) Heading code H1 contains signal codes as follows: 0000 应答、未表示answer signal, unqualified 0001 应答、计费answer signal, charge 0010 应答、免费answer signal, no charge 0011 挂机clear-back signal 0100 拆线clear-forward signal 0101 再应答re-answer signal 0110 前向转移forward-transfer signal 0111 主叫用户挂机calling party clear signal (national option) spare d) 国内呼叫监视消息Heading code H0 is coded 1101 e) 话务员消息Operator signal. Heading code H1 contains signal codes is 0001. 3.9 电路监视消息Circuit supervision message The basic format of the circuit supervision message is shown in Figure 15/Q.723. FIGURE 15/Q.723...[CCITT 35570] = 3 CM The following codes are used in the fields of the circuit supervision message: a) Label: see § 2 b) Heading code H0 is coded 0111 c) Heading code H1 contains signal codes as follows: 0000 spare 0001 释放监护release-guard signal 0010 闭塞blocking signal 0011 闭塞证实blocking-acknowledgement signal 0100 解闭unblocking signal 0101 解闭证实unblocking-acknowledgement signal 0110 导通检验请求continuity-check-request signal 0111 电路复原reset-circuit signal spare 3.10 Circuit group supervision message The basic format of the circuit group supervision message is shown in Figure 16/Q.723: FIGURE 16/Q.723...[CCITT 85970] = 3 CM The following codes are used in the fields of the circuit group supervision message: a) Label: see § 2 The following interpretations apply to the CIC given in the label: i) If the range field is not coded all zero the CIC given in the label is the first CIC within the circuit group or the first CIC within that part of the circuit group. ii) If the range field is coded all zero (national option) the CIC given in the label is a representative CIC within the circuit group. b) Heading code H0 is coded 1000 c) Heading code H1 contains message codes as follows: 0000 spare 0001 面向维护的群闭塞消息Maintenance oriented group blocking message 0010 面向维护的群闭塞证实消息Maintenance oriented group blocking-acknowledging message 0011 面向维护的群解闭消息Maintenance oriented group unblocking message 0100 面向维护的群解闭证实消息Maintenance oriented group unblocking-acknowledgement message 0101 面向硬件的群闭塞消息Hardware failure oriented group blocking message 0110 面向硬件的群闭塞证实消息Hardware failure oriented group blocking-acknowledge message 0111 面向硬件的群解闭消息Hardware failure oriented group unblocking message 1000 面向硬件的群解闭证实消息Hardware failure oriented group unblocking-acknowledgement message 1001 电路群复原消息Circuit group reset message 1010 电路群复原证实消息Circuit group reset-acknowledgement message 1011 软件产生的群闭塞消息Software generated group blocking message (national option) 1100 软件产生的群闭塞证实消息Software generated group blocking-acknowledgement message (national option) 1101 软件产生的群解闭消息Software generated group unblocking message (national option) 1110 软件产生的群解闭证实消息Software generated group unblocking-acknowledgement message (national option) 1111 spare d) 范围Range: 原则上有两种可能饿编码in principle, two different codings are possible: i) 非全0：该消息与整个电路群或其中一部分有关。初电路群复原消息，都包含状态字。需要处理的电路数量为范围字段的数值加1，（电路数为2到256，范围值为1到255。国内为31）。所需处理的第一条CIC为标题给出的CIC。not all zero: The message is related to a whole circuit group or a part thereof, and includes a status field unless the message is the circuit group reset message. The number of consecutive circuits to be handled is indicated by the value contained in the range field increased by 1. The CIC of the first circuit to be handled is given in the label. The number of circuits to be indicated is 2 (range value 1) to 256 (range value 255). ii) 全0：该消息与预先约定的电路群有关。不包含状态字。这种情况下，电路群的寻址方式是由电路群中代表CIC给出。all zero1) (national option): The message is related to a pre-determined circuit group. No status field is included. In this case the circuit group is addressed by means of a representative CIC within the circuit group. Note – In national networks, the range field may not be used if only the concept of pre-determined circuit group applies. e) 状态字Status field 当范围字段不全为0时，除电路群复原消息外的所有电路群监视消息都包含状态表示语比特。状态表示语比特的数量由范围字段的值+1表示。All circuit group supervision messages except the circuit group reset message include a status field containing status indicator bits when the range field is not coded all zero. The number of status indicator bits is indicated by the value given in the range field increased by one. 状态表示语最多包括256个（国内最多32）一比特状态表示语。第一个状态表示语比特表明的电路由标记内的CIC标识。第二个状态表示语比特字由标记内的CIC+1标识。类推。The status field contains up to 256 one bit status indicators. The first status indicator bit is related to the circuit indicated by the CIC contained within the label, the second one is related to the circuit address by the CIC contained in the label increased by 1. Figure 17/Q.723 [CCITT 73570] = 3 CM 注：国内消息中范围为1-31。状态字长度为n*8，n<=4。状态字为CIC=》CIC 到 CIC+31 最后一个状态表示语比特字由标记内的CIC+范围字段的数值标识。状态字段由八位位组的整数倍组成，在最后一个八位位组内的不作为状态表示语的比特位用0填充。The CIC of the last circuit concerned is obtained by adding the value given in the range field to the CIC in the label. The status field consists of an integral number of octets. Bits within the last octet that are not used as status indicators are filled with zeros. The status indicator bits are coded as follows: – in all group blocking messages (MGB, HGB, SGB) 1 blocking 0 no blocking – in all group blocking-acknowledgement messages (MGB, HBA, SBA) 1 blocking acknowledgement 0 no blocking acknowledgement – in all unblocking messages (MGU, HGU, SGU) 1 unblocking 0 no unblocking – in all group unblocking-acknowledgement messages (MUA, HUA, SUA) 1 unblocking acknowledgement 0 no unblocking acknowledgement – in the circuit group reset-acknowledgement message (GRA) 1 blocking for maintenance reasons 0 no blocking for maintenance reasons 3.11 电路网管理消息Circuit network management messages The following type of circuit network management message is specified and identified by one of the heading codes H1. Unallocated H1 codes in this message group are spare. 3.11.1 自动拥塞控制Automatic congestion control information message The basic format of the automatic congestion control (ACC) information message is shown in Figure 18/Q.723: FIGURE 18/Q.723...[T1109900-88] = 3 CM The following codes are used in the fields of the automatic congestion control information message. a) Label: see § 2 b) Heading code H0 is coded 1001 c) Heading code H1 is coded 0001 d) Message indicators bits B A ACC信息ACC information 0 0 备用spare 0 1 拥塞控制级1congestion level 1 1 0 拥塞控制级2congestion level 2 1 1 spare bits HGFEDC spare ANNEX A (to Recommendation Q.723) 计费消息Charging messages（国内暂不用，见3.6.3） A.1 Introduction The application of Signalling System No. 7 in national networks was recognized from the beginning of the discussions about the signalling system. The result of this can be found throughout the specifications especially in those Recommendations dealing with the TUP. One of the points which is particularly of interest for an Administration is the possibility of transfer of charging information. Signalling System No. 7 allows for such a feature for charging a calling subscriber by defining a specific charging message as indicated in § 3.6.2. However, the detailed format, coding and related procedures are not given, mostly because this matter is very dependent on the circumstances within a specific national network. The following examples illustrate a particular implementation in a national network for telephony without exclusion of other possible solutions. A.2 Starting points Before describing in detail the messages involved, a number of starting points have to be adopted. a) The first No. 7 exchange performs metering according to all possible tariffs. b) The determination of a particular tariff is performed in a point somewhere in the network. c) The receipt of messages containing charging information should be acknowledged within the call control procedures. d) At dedicated moments the actual charging should be adapted. e) A variety of charging possibilities should be available. The effect of these starting points is: a) the actual generation of charging units according to a particular tariff is always performed at the lowest level of the national public telephone network (local exchange); b) the determination of tariffs for local and trunk calls is carried out in the local exchange and for international calls in the international exchange; however, also the use of a centre for determination of all kinds of tariffs is possible; c) the transmission of charging information is assured at the highest level of the call control procedures and possibly inhibits call completion without receipt of charging information; d) calls of long duration can be subject to different charging rates; e) the application of charge free calls, specific charge on answer, time dependent charging during a call, additional (specific) charge during a call and a combination of these. A.3 Messages and procedures To meet all the above mentioned requirements a number of messages are defined. A.3.1 Charging message This message has to be sent for any call, charge free or not. In the procedure this is covered by the fact that the charging message has to be received during call set up before receipt of the address complete message. If not, then the call should be cleared immediately. The content of the message will vary depending on the actual tariff and this is indicated by a number of indicators indicating the presence of certain fields in the message. Possible contents: a) charge band The indication of a certain charge band should allow the receiving exchange to charge a call according to a certain tariff including possible switchover times to higher or lower rates. This method results in a simple message but requires the receiving exchange to have all the information available related to all possible charge bands, national and international. b) explicit charging indication In this case the message contains explicit indications of details of the tariff viz. – number of charging units on answer (packet) – time dependent tariff(s) – possible switchover time. This method results in a more complex message but does not require the permanent storage of any charging information. A.3.2 Change message A consequence of the adoption of the method with explicit charging indication (§ A.3.1 b)) is the necessity to allow for tariff switchover for calls of very long duration or for calls which are answered just after the switchover time given in the message described in § A.3.1 b). The content of such at message is rather simple because it only contains the new applicable tariff and the actual switch-over time. The procedure to acknowledge the receipt of the message cannot be found in the normal call control procedure, therefore an acknowledgement message (see § A.3.5) in the forward direction is used. If this acknowledgement message is not received within a certain time, the change message has to be repeated. A.3.3 Collection charging For a variety of reasons it might be necessary to charge a subscriber during the call a certain amount. For this purpose a message is used indicating the number of charging units related to the amount for which the subscriber has to be charged. The procedure to assure the receipt of this message is the same as described in § A.3.2 above. A possible further collection charging message should not be sent before receipt of the acknowledgement message and the charging confirmation message (see § A.3.4 charging confirmation). A.3.4 Charging confirmation In relation with the message described in § A.3.3 a message in the forward direction is required indicating how many charging units actually are charged to the subscriber. This number should match to the number given in the collection charging message, otherwise it must be concluded that for some reason the order is not executed, e.g., a certain service should now be withheld to be furnished to the subscriber. Again the procedure is the one as described in § A.3.2 above but in the opposite direction. A.3.5 Acknowledgement To acknowledge the receipt of the messages described in Ё A.3.2, A.3.3 and A.3.4, an acknowledgement message is used in both directions only indicating the receipt of the related message. A.4 Formats and codes A.4.1 Charging messages A.4.1.1 Charge band FIGURE Q.723... [CCITT-86010] = 3 CM – Charge band A charge indicates the combination of tariffs including switch-over times which is applicable for a certain period (e.g., day or week). A.4.1.2 Explicit charging indication FIGURE Q.723....[CCITT-86020] = 3 CM – Message indicators bit A: tariff indicator current tariff (A) 0 packet charging field and tariff indicators current tariff (A) not present 1 packet charging field and tariff indicators current tariff (A) present bit B: tariff factor current tariff (A) 0 tariff factor field current tariff (A) not present 1 tariff factor field current tariff (A) present bit C: tariff indicator next tariff (B) 0 packet charging field and tariff indicators next tariff (B) not present 1 packet charging field and tariff indicators next tariff (B) present bit D: tariff factor next tariff (B) 0 tariff factor field next tariff (B) not present 1 tariff factor field next tariff (B) present bit H-E spare – Packet charging field 0000 | number of charging units on answer 1111 – Tariff indicators 0000 tariff scale 0 (no time dependent tariff) 0001 tariff scale I | | every scale indicates a certain step in seconds or parts thereof 1111 tariff scale XV – Tariff factors If a call is charge free (A  B  C  D  0) only the message indicator octet is present. If a call is charge free from the start but may become chargeable (A  1, B  0, C  1, D  0/1), the packet charging field for the current tariff is 0000 and the tariff indicator for the current tariff indicates scale 0. If a call is chargeable from the start but may become charge free (A  1, B  0/1, C  1, D  0) the packet charging field for the next tariff is 0000 and the tariff indicator for the next tariff indicates scale 0. If a call is chargeable according to only one tariff (A  1, B  0/1, C  0, D  0), also the time indicator is not present in the message. The actual tariff is determined by multiplication of the step indicated by the tariff indicator with the tariff factor which gives then a specific charging unit interval in seconds. – Time indicator 000000 spare 000001 00.30 h 000010 01.00 h | | | | 110000 24.00 h A.4.2 Tariff change message FIGURE Q.723...[CCITT-86030]= 3 CM – Message indicator Bit A: tariff factor next tariff 0 tariff factor field next tariff not present 1 tariff factor field next tariff present Bits D-B: spare – Tariff indicator, tariff factor and time indicator: see § A.4.1.2 A.4.3 Collection charging message FIGURE Q.723...[CCITT-86040]= 3 CM The collection field contains the number of charging units which are to be charged to the calling subscriber. The field has a length of 8 bits so a maximum of 256 units is possible. A.4.4 Charging confirmation message FIGURE Q.723...[CCITT-86040]= 3 CM – Heading code H1 H1  0101 confirmation of packet charging H1  0110 confirmation of collection charging – Charging unit field Number of charging units which actually are charged to the calling party A.4.5 Acknowledgement message FIGURE Q.763...[CCITT 86050]= 3 CM – Heading code H1 H1  1000 acknowledgement receipt of tariff review, collection charging or charging confirmation message References [1] CCITT Recommendation Characteristics of primary PCM multiplex equipment operating at 2048 kbit/s, Rec.燝.732. [2] CCITT Recommendation Characteristics of 2048-kbit/s frame structure for use with digital exchanges, Vol.營II, Rec. G.734. [3] CCITT Recommendation Second order PCM multiplex equipment operating at 8448 kbit/s, Rec. G.744. [4] CCITT Recommendation Characteristics of 8448-kbit/s frame structure for use with digital exchanges, Rec.燝.746. [5] CCITT Recommendation Language digit or discriminating digits, Rec. Q.104. [6] CCITT Recommendation Signalling Connection Control Part, Recs. Q.711-Q.714. 1) Range value zero is only for national use. 2 错误！文档中没有指定样式的文字。 错误！文档中没有指定样式的文字。 1 _923126262.unknown _927550660.unknown _927550679.unknown _927550692.unknown _927550643.unknown _923125816.unknown _923125985.unknown _923126053.unknown _923125924.unknown _923125627.unknown