The PRA board is connected to a digital line termination (DLT) by 2 symmetrical twisted pairs.
Cable impedance: 120 Ohms +/- 20% between 200kHz and 1MHz; 120 Ohms +/- 10% at 1
MHz.
Remark:
We recommend using an L120-series cable (or the L204 equivalent).
The distance T1-DLT or T2-DLT is limited by the amount of loss between the DLT and T1/T2,
which must not exceed 6 dB at 1024 kHz.
4.2.1.5.3 Analog Public Network
Without TL Forwarding
With LR Forwarding
In the event of a loss of tension or PowerCPU malfunction, this solution allows forwarding of
the analog line, connected to the APA board's equipment 1, to an analog station.
Chapter
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