MSU是信令接收出错时仅传输的信令单元。
MSUs are the only signal units that are retransmitted if they are received in error.
信令单元初始定位——在激活或恢复信令链路之前调用初始定位。
Signal unit initial alignment - invokes initial alignment prior to activating or restoring a signaling link.
信令单元错误检测和校正——废弃检测到的出错消息并请求重新传输。
Signal unit error detection and correction - discards detected erroneous message and requests a re-transmission.
MTP第2级消息放置于三种信令单元以便在链路上传输(对还是错？)
MTP Level 2 messages are placed in three types of signal units for transport across the link (true or false?)
链路状态信令单元(LSSU)——将链路状态信息传输到某个相邻的信令点。
Link status signal Units (LSSU) - transport link status information to an adjacent signaling point.
链路状态信令单元(LSSU)——将链路状态信息传输到某个相邻的信令点。
Link status signal Units (LSSU) - transport link status information to an adjacent signaling point.
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