七号信令原理_七号信令的结构_七号信令漏洞(13)

GRQ 一般请求消息(Genneral request message)

GRS 电路群复原消息(Circuit group reset message)

GSM 一般前向建立信息消息(General forward setup information message)

HBA 面向硬件故障的群闭塞证实消息(Hardware failure oriented group blocking acknowledgement message)

HGB 面向硬件故障的群闭塞消息(Hardware failure oriented group blocking message)

HGU 面向硬件故障的群闭塞解除消息(Hardware failure oriented group unblocking message)

HUA 面向硬件故障的群闭塞解除证实消息(Hardware failure oriented group unblocking acknowledgement message)

I A I 带有附加信息的初始地址消息(Initial address message with additonal information)

I AM 初始地址消息(Initial address message)

LOS 线路不工作信令(Line out of service signal)

MAL 恶意呼叫识别信令(Malicious call identification signal)

MBA 面向维护的群闭塞证实消息(Maintenace oriented group blocking acknowledgement message)

MGB 面向维护的群闭塞消息(Maintenance oriented group blocking message)

MGU 面向维护的群闭塞解除消息(Maintenance oriented group unblocking message)

MPM 计次脉冲消息(Meter pulse message)

MUA 面向维护的群闭塞解除证实消息(Maintenace oriented group unblocking acknowledgement message)

NNC 国内网拥塞信令(National network congestion signal)

OPR 话务员信令(Operator signal)

RAN 再应答信令(Reanswer signal)

RLG 释放监护信令(Release guard signal)

RSC 电路复原信令(Reset circuit signal)

SAM 后续地址消息(Subsequent address message)

SAO 带有一位的后续地址消息(Subsequent address message with one signal)

SBA 软件产生的群闭塞证实消息(Software generated group blocking acknowledgement message)

SEC 交换设备拥塞信令(Switching equipent congestion signal)

SGB 软件产生的群闭塞消息(Software generated group blocking message)

SGU 软件产生的群闭塞解除消息(Software generated group unblocking message)

SLB 用户市忙信令(Subscriber local busy signal)

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