HWIC-1B-U

Cisco 1-Port ISDN BRI U High-Speed WAN Interface Card – ISDN terminal adapter – HWIC – ISDN BRI U – for Cisco 1841 3G, 1841 ADSL2, 18XX, 1921 4-pair, 1921 ADSL2+, 19XX, 28XX, 29XX, 38XX, 39XX