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ISU 512 (S/T-Interface) Domestic
By ADTRAN

The ISU 512 is designed to operate in a dual port mode for videoconferencing at 112/128 Kbps. This allows end-to-end compatibility when communicating with a video system utilizing two Switched 56 DSUs or a dual port ISDN terminal adapter. For this application, 56/64 Kbps is transmitted over the V.35 interface and the RS-530 interface. ... 

ISU 512 ISDN INV MUX 512K U Int with Accss
By ADTRAN

The ISU 512 is designed to operate in a dual port mode for videoconferencing at 112/128 Kbps. This allows end-to-end compatibility when communicating with a video system utilizing two Switched 56 DSUs or a dual port ISDN terminal adapter. For this application, 56/64 Kbps is transmitted over the V.35 interface and the RS-530 interface. ... 

48-Port IP DSLAM Package
By Zhone

Optimized for the Hospitality, MxU and Campus environment, the BitStorm 4800 and BitStorm 4800 Express platforms provide cost-effective, robust, secure access networks for hotels, timeshares, apartment buildings, condos, dormitories, hospitals, and other campus deploymentsThe BitStorm 4800 Express product ...