MSU (Message Signal Unit)
MSU（消息信令单元）
TCAP messages are contained within the SCCP message signal units, and are made up of two sublayers which work together:
TCAP 消息包含在 SCCP 消息信令单元中，并由两个一同运行的子层组成：
Message Signal Units (MSU) - transport user information received from the SCCP, ISUP or the MTP 3 layers.
消息信令单元(MSU)--传输从SCCP、ISUP或MTP第3层收到的用户信息。
Signal unit delimitation - inserts binary 襢lags? to delimit (separate) messages.
信令单元定界 -- 插入二进制的"标志"定界（分隔）消息。
Signal unit error detection and correction - discards detected erroneous message and requests a re-transmission.
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。
MTP Level 2 messages are placed in three types of signal units for transport across the link (true or false?)
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？）
FSU (Fill-in Signal Unit)Signal unit types
FSU（插入信令单元）信令单元类型
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。
MTP LEVEL 1Signaling message handling
MTP第1级信令消息处理
These signal units are used to bring a link up or down and verify that it is working correctly.
这些信令单元用于建立或撤消某个链路并验证链路是否正常工作。
MSUs are the only signal units that are retransmitted if they are received in error.
MSU 是信令接收出错时仅传输的信令单元。
This information is sent as a setup message by the signaling gateway back to the MGC.
这种消息作为建立的消息由信令网关发回给MGC。
LSSU (Link Status Signaling Unit)Last bit of previous unit
LSSU（链接状态信令单元）前一个单元的最后一位
A message would contain the signaling route information in its header.
每个消息都应该在头中包含信令路由信息。
TCAPSignaling message handling and network management functions
TCAP信令消息处理和网络管理功能
transfer SS7 messages to other signaling points within the network
将 SS7 消息传输到网络中的其他信令点
SS7 uses out-of-band signaling where signaling messages are carried on a separate physical channel.
SS7 则使用带外信令，即在另外的一个物理信道上传送信令消息。
Update document statistics (click Properties on the File menu)
更新文档统计信息(单击“文件”菜单中的“属性”命令)