Analogue Station display issues
From Zenitel Wiki
Problem:
- "Older" Display Stations occasionally get black rectangles on the bottom line of the displays?
Answer:
The AlphaCom series is not compatible with TouchLine display stations produced before March 1995. These stations are not compatible due to less sensitivity on the display signal receiver. TouchLine display stations produced after March 1995 are labeled version 1.1 and are fully compatible with the AlphaCom servers.
Due to EMC approval issues, the display carrier signal out from the AlphaCom was reduced compared to the previous generation of TouchLine MPC exchanges. To compensate for this the display stations as from May 1995 came with increased sensitivity on the reception of the display signal. Stations before this date might get "drop out" of the display when used with AlphaCom.