Provides interface for (4) standard loop-start CO trunks, includes power failure transfer circuit for one line, equipped with (2) 8-conductor interface jacks, can only be installed on 084M, 080E, or 008E cards, maximum 1 daughter board per 084M, 080E, & 008E card, maximum of 3 can be added to each KSU (Main & Expansion), maximum 9 can be added per system.
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Telephony, PBX & VoIP > Phone Systems