1.1. High Impedance (HiZ) Hardware Configuration

As shown in Figure 1, a digital line connecting the CPE PBX (user side) to a CO PSTN (network side) can be monitored using two HiZ connectors on a HiZ board. One of these HiZ connectors receives the voice and signaling data transmitted by the CO PSTN, while the other receives the data transmitted by the CPE PBX. This typical HiZ configuration constitutes the hardware part of a call logging system. The Call Logging API simplifies the implementation of the software in such a system.

Figure 1. Typical High Impedance (HiZ) Configuration

NOTE:

For more detailed information about connecting the HiZ cable assemblies, see the DM3 HiZ DualSpan Series Quick Install Card that is included with the board.

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