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You can use this monitor to monitor the communication within an SAP system, between different systems, or to external applications. The monitor consists of the following six subtrees; for more detailed information about the subtrees, see the documentation for the corresponding application.

Subtree Description and Additional Information

Gateway Service

Interface that enables communication between SAP R/2, ABAP, and external applications using the CPI-C protocol.


Technology for creating and operating distributed applications that ensures a distributed and integrated SAP installation; it includes a controlled exchange of messages with consistent data retention on loosely connected SAP application systems.

LDAP Directory Services

Access requests from SAP systems to a directory server; the accesses are performed using the LDAP Connector.


Interface for the integration of external communication into the SAP system with which external manufacturers connect their communication servers to the SAP system.

System Log Messages

Recording of errors and events in the SAP system

More information: Communication subtree of the Syslog Monitor

Transactional RFC and Queued RFC

Function calls between systems; the call is only executed once in the target system, and either all or no calls of a Logical Unit of Work (LUW) are performed; queued RFC also guarantees the chronological processing of RFCs

More information: Transactional RFC and Queued RFC Monitor


To obtain information about a particular monitoring tree element, select the MTE and choose F1. The system displays a short description of the node. To see a detailed description of the node, choose Long Text.


To start the monitor, follow the procedure below:

  1. Start the Alert Monitor using transaction RZ20 or choose CCMS → Control/Monitoring → Alert Monitor.
  2. On the CCMS Monitor Sets screen, expand the SAP CCMS Monitor Templates set.
  3. Start the Communications monitor from the list by double-clicking it.