Provides 12-Ports connecting to ISDN-BRI terminals. Each port has TXT, TXR, PXT, and PXR signal leads. Up to 8 ports can be used for adjunct switch application interface (ASAI) links. Each port operates at 192 kbps per second and has 2 B-channels and 1 D-channel. Requires a packet control circuit pack (TN778) when used in R6si systems or packet bus-equipped R6vs systems. Range of up to 3300 ft. maximum from the system to the voice terminal. Can connect 24 terminals where each terminal uses 1 B-channel and shares the D-channel.

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