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Cisco High-Speed Channelized T1/E1 and ISDN PRI – ISDN terminal adapter – HWIC – ISDN PRI – 2.048 Mbps – T-1/E-1 – digital ports: 1 (32 channels) – for Cisco 2811 2-pair, 28XX, 28XX 4-pair, 28XX V3PN, 29XX, 38XX, 38XX V3PN, 39XX, 39XX ES24