Juniper SRX5400 Hardware Manual page 216

SRX5400 Services Gateway Hardware Guide
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202
and protect against lightening surges and commercial power disturbances,
the intrabuilding ports must not be metallically connected to interfaces
that connect to the OSP or its wiring. The intrabuilding ports on the services
gateway are suitable for connection to intrabuilding or unexposed wiring
or cabling only. The addition of primary protectors is not sufficient
protection for connecting these interfaces metallically to OSP wiring.
General Electrical Safety Guidelines and Warnings on page 173
Installation Instructions Warning on page 158
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