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Request a Quote TN464HP Avaya TN464HP DS1/ISDN PRI Circuit Pack The TN464HP features CRC-4 generation and checking (E1 only); Stratum-3 clock capability; ISDN-PRI T1 or E1 connectivity; line-out (LO) and line-in (LI) signal leads for unpolarized, balanced pairs; support for CO, TIE, DID, and off-premises station (OPS) port types that use any of the following protocols: - robbed-bit signaling protocol, - proprietary bit-oriented signaling (BOS) 24th-channel signaling protocol, or - DMI-BOS 24th-channel signaling protocol; support for Russian incoming ANI; support for universal, digital, signal level-one equipment in wideband ISDN-PRI applications; test-jack access to the DS1 or E1 line, and support of the 120A integrated channel-service unit (ICSU) module; as well as support for the enhanced maintenance capabilities of the ICSU. These circuit packs can communicate with Avaya Interactive Response System, come with downloadable firmware, and feature support for echo cancellation. Avaya TN464HP DS1/ISDN PRI Circuit Pack