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What is the catalog number for the optional Digital Phone Board for the SDSB1175C Surgebreaker Plus (Whole House Surge Arrester)?

Although an optional Digital Phone Board was originally planned, it was never necessary as an upgrade. The standard Telephone Surge Protection Module provided was ultimately designed to be suitable for both analog and and digital signals, making the need for an optional upgrade unnecessary.

CTA-ID : 15529
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