Troubleshooting ..................................................18
Diagnostic Aids ........................................................... 19
Power Supply Status ................................................ 19
819S Switching unit (Multi-door systems) ................................ 19
Fault Finding ............................................................. 20
Specifications ....................................................23
Model BV Video Telephone ................................................. 24
Model 61 Speech Unit ..................................................... 24
Model BV700 Camera ..................................................... 24
Model 440 Power Supply ................................................... 25
Model 540 Power Supply ................................................... 25
Model VDC6 Video Distributor PCB ........................................... 26
Model 819S 2 Door Video Switching Unit ...................................... 26
Cable and Wiring Details ...........................................27
1 way single door ....................................................... CW1
2-10 way single door ..................................................... CW2
11-60 way single door .................................................... CW3
1-10 way 2 door ........................................................ CW4
11-60 way 2 door ....................................................... CW5
