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The Definity TN2198 ISDN-BRI 2 Wire U Interface allows connection to the ANSI standard 2-wire U-interface 2-wire interface from the TN2198 connects to an NT1 network interface.
The Definity TN2198 ISDN-BRI 2 Wire U Interface has a 4-wire interface on other side of the NT1 that may connect to 1 or 2 telephones
The Definity TN2198 ISDN-BRI 2 Wire U Interface also has a 12-port interface at the ISDN U reference point.
Definity TN2198 ISDN-BRI 2 Wire U Interface requires packet control circuit pack (TN778) on R6si and packet bus equipped on R6vs.
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