The following table lists the MTP 2 task messages. Messages also contain a message type and a link ID.
Message |
Direction |
Parameters |
Description |
MTP3 -> MTP2 |
Service Provider ID Service User ID Source Entity ID Source Instance ID |
Binds user application as sole user of MTP 2 link. | |
MTP3 -> MTP2 |
Service Provider ID Status |
Requests MTP 2 to bring up a physical link. Use the status parameter to specify status to bring link up in (for example, normal, emergency, or power on only). | |
MTP2 -> MTP3 |
Service User ID |
Notifies application that link connection successfully completed (link is aligned). | |
MTP3 -> MTP2 |
Service Provider ID Data |
Requests MTP 2 to transmit an MSU (message signal unit) on a particular link. | |
MTP2 -> MTP3 |
Service User ID Status Data |
Sends transmitted messages that have not been acknowledged by the far exchange when the application is performing a changeover. | |
MTP2 -> MTP3 |
Service User ID Data |
Notifies the application of an incoming data packet. | |
MTP3 -> MTP2 |
Service Provider ID Reason |
Requests MTP 2 to disconnect a link. | |
MTP2 -> MTP3 |
Service User ID |
Notifies the application that the disconnect request was received. | |
MTP2 -> MTP3 |
Service User ID Reason |
Notifies the application that a link disconnected. | |
MTP3 -> MTP2 |
Service User ID |
Notifies MTP 2 that the application received the disconnect indication. | |
MTP3 -> MTP2 |
Service Provider ID Action |
Deprecated. | |
MTP2 -> MTP3 |
Service User ID Action FlcLevel |
Deprecated. | |
MTP3 -> MTP2 |
Service User ID Action FlcLevel |
Deprecated. | |
MTP3 -> MTP2 |
Service Provider ID Action Status |
Requests a special status or control function. | |
MTP2 -> MTP3 |
Service User ID Action Status |
Notifies the application that the status request was received. | |
MTP2 -> MTP3 |
Service User ID Status Value |
Notifies the application that a link has gone up or come down or that level 1 buffer depletion occurred. | |
MTP3 -> MTP2 |
Service User ID Status |
Confirms that MTP 3 received a status indication. |