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1.6 NID (Network Interface Device)
Network interface devices (NIDs) have been
developed to deal with interconnect. The
interface device provides the following:
Electrical protection for the
subscriber loop.
Test point for Field Technician.
Test and access point for the
customer.
NID consist of –
Plastic body-base, lock hole for
subscriber
A Protector – with or without a
RJ11 test jack
Ground bar
Ground wire
Figure 43: NID
Figure 44: Components of NID
Surge Protector
Communication systems are vulnerable to electrical damage from lightning or
other surges thus requiring a surge protector at the customer premise to prevent from
injuries, fires, and damages.
