SS7 - MESSAGE TRANSFER PART

Az MTP alap funkcionális diagramja:
                                               |
                                               |
                                               |

   level4         level3        level2       level1       level2        level3         level4
+----------+   +----------+  +----------+ +----------+ +----------+  +----------+   +----------+
|User      |   |Common    |  |Link      | |Signalling| |Link      |  |Common    |   |User      |
|message   |---|transfer  |--|control   |-|data      |-|control   |--|transfer  |---|message   |
|processing|   |functions |  |functions | |link      | |functions |  |functions |   |processing|
+----------+   +----------+  +----------+ +----------+ +----------+  +----------+   +----------+
                             |                 |                  |
                             |                 |                  |
  User part                  |                 |                  |                   User part
ISUP, SCCP..                 |<-----------signalling link-------->|                 ISUP, SCCP..

             |<--------------------------------MTP------------------------------->|