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Chapter 8 • Configuring the HN router for VADB backup
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1037753-0001 Revision A
Optional protection module
Some countries may require that a protection module is installed
between the HN router router and the public switched telephone
network (PSTN) telephone line.
The protection module is a high-speed electronic circuit protector
that provides both over-voltage and over-current protection. The
module includes a short telephone cable that connects to the
telephone line port on the HN router and a grounding cable with a
ring terminal that connects to the HN router backplane, as shown
in
Figure 54.
Figure 54: VADB connections with protection module