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DTIB8 can be installed on the SLIB/DTIB connector, and provides 8 Digital Keyset ports that are used for 2-wire connections to Digital Keysets. It has module connectors, MJ1 and MJ2, that are used to connect Digital Keyset lines to the DTIB8 and a din connector, CN2, to connect expansion modules like VOIM, SLIM, and DTIM.

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