Provides for termination of a digital ISDN PRI interface that provides 24 voice channels over a 4-wire circuit. Supports fractional ISDN in one port increments. Never increases the maximum trunk capacity of a system.ISDN card must be installed in the universal card slot on a KSU. Trunks can be mixed on the same card. Maximum 1 per KSU, 2 per system.
Note: Some dual cabinet configurations do not support ISDN (72 & 40 port combination) and others support a single ISDN. External CSU required. Required CPC-EX and SCC-B (Version 1.3 or Higher). CPC-B and CPC-A-II cards will not support ISDN. CPC EX and SCCB Processors are required to support this card. System also Requires MDF Connector (VB-43562) and Sync Unit (VB-43563) to operate.