Hey all...
For anybody who might try to hookup caller ID to these IDS's (with the most common CID used on them -the MLX-82's or rebadged ones like the one I used) .... as mentioned in a previous post they require a RS232 ground isolation device installed in between the MLX and the KSU. Previous post:
post I used a cheapy one and it didn't work...the one that worked was this by TRIPP LITE:
device Just thought I'd pass along this FYI