七号信令原理_七号信令的结构_七号信令漏洞(12)

NCB 国内呼叫监视消息组(National call supervision message group)

NSB 国内后向建立成功消息组(National successful backward set up message group)

NUB 国内后向建立不成功消息组(National unsuccessful backward set up message group)

SBM 后向建立成功消息组(Successful backward set up information message group)

UBM 后向建立不成功信息消息组(Unsuccessful backward set up information message group)

TUP消息名含义如下：

ACB 接入拒绝信令（Access barred signal)

ACC 自动拥塞控制信息消息(Automatic congestion control information message)

ACM 地址全消息(Address complete message)

- ADC 地址全、计费(Address complete,charge)

- ADN 地址全、免费(Address complete,no charge)

- ADX 地址全、投币式(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、投币式(Address complete,coin box subscriber free)

ADI 地址不全信令(Address incomplete signal)

ANC 应答信令、计费(Answer signal,charge)

ANN 应答信令、免费(Answer signal,no charge)

ANU 应答信令、未说明(Answer signal,unqualified)

BLA 闭塞证实信令(Blocking-acknowledgement signal)

BLO 闭塞信令(Blocking signal)

CBK 挂机信令(Clear-back signal)

CCF 导通故障信令(Continuity -failure signal)

CCL 主叫用户挂机信令(Calling party clear signal)

CCR 请求导通检验信令(Continuity check request signal)

CFL 呼叫故障信令(Call failure signal)

CGC 电路群拥塞信令(Circuit group congestion signal)

CHG 计费消息(Charging message)

CLF 拆线信令(Clear forward signal)

COT 导通信令(Continuity signal)

DPN 不提供数字通路信令(Digital path not provided signal)

EUM 扩充的后向建立不成功信息消息(Extended unsuccessful backward set up information message)

FOT 前向转移信令(Forward transfer signal)

GRA 电路群复原证实消息(Circuit group reset acknowledgement message)

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