E-DOC-CTC-20071119-0003 v1.0
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1| Introduction
1.2 CWMP Transaction Sessions
What is a transaction session?
TR-069 defines a transaction session as a sequence of Remote Procedure Calls (RPCs), both requests and
responses. A transaction session is completed when both parties (CPE and ACS) have no messages left to
send.
The CPE has an important role:
All transaction sessions are established by the CPE.
The CPE maintains a TCP connection (persistent HTTP connection) for the duration of the session.
The CPE is also responsible for closing a transaction session.
Session establishment
All transaction sessions are established by the CPE, by sending an Inform RPC to the ACS.
We distinguish two types of transaction sessions:
CPE initiated sessions
Asynchronous ACS initiated sessions: the CPE establishes a transaction session to the ACS after receipt
of a Connection Request from the ACS.
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