1. Call Logging API Overview

The Call Logging API is the software companion of the HiZ family of products, which provide high impedance interfaces for non-intrusive line monitoring.

The Call Logging API enables the development of applications to monitor the traffic on digital lines between the network side, that is the Central Office (CO) Public Switched Telephone Network (PSTN), and the user side, that is the Customer Premises Equipment (CPE) Point Branch eXchange (PBX).

The Call Logging API can be used to create call monitoring applications that monitor Layer 1 (L1) alarms, Layer 2 (L2) events, and Layer 3 (L3) messages. More specifically, the Call Logging API offers the following features for the development of call monitoring applications:

• handling of L1 alarms, such as "Loss of Sync", L2 events, including lost frames, and L3 messages, such as state changes, and reporting the alarms, events, and messages to the application
• gathering of L3 messages and handling of transaction state transitions, such as dialing, connected, or disconnected, according to the L3 messages received
• querying previously received L3 messages when a transaction event is triggered
• retrieving protocol-specific information from L3 messages

In addition, when used with the Voice library, the Call Logging API can be used to build call recording applications to record conversations on the digital lines that connect the user side and the network side.

Click here to contact Dialogic Customer Engineering