NEC ISDN Primary Rate Interface Unit
- (Model# PRT(1)-U20 ETU Stock# 750476)
- The Primary Rate Interface Unit provides for the termination of an ISDN PRI line for voice service only. This unit supports 4ESS(AT&T Custom), AT&T 5ESS(Lucent Custom), DMS-100 (Custom and National ISDN) and NI-2 protocols. A CLKG-U10 unit must be connected to the CPUI ( )-U10 ETU.
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