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. A special RS-366 Y cable provides the two RS-366 interfaces for this application. For convenience in communicating with multiple video sites, the ISU 512 can be configured to transparently switch between the dual port mode at 112/128 Kbps and the single port mode of 384 Kbps without user intervention and reconfiguration of the unit.
Configuration via front panel keypad, VT100, or remotely over the ISDN line.
16-button keypad
Front Panel:
Switches:
D Channel Switches:
