RCH3000 vs MCS2000

[Spiffy50]

Hey gang. I've got an RCH3000 that I'm trying to interface with my MCS2000 M3. I built the cable as described in the manual and double-checked that the RCH was set to MCS mode. When I connect it to the radio, nothing happens - the RCH just shows FAIL 01/90.

I read a few threads on here of people with similar issues, but there was never any resolution. Can anyone give me a hand in getting this thing to play nice?

[W1HVN]

Are you using an L3208A digitial box between?

Reply and we can continue.

[Spiffy50]

No, I am not.

As per a post from wavetar in the past (and the service manual), I don't need the box. The cable between the radio and the RCH is less than the maximum permitted (its less than 5 feet).

[wavetar]

It's been many years since I made the cable as per the manual, and I don't have a unit here to test with, but it did work at the time. Are you 100% sure the RJ-45 pinout is correct? It's very easy to make it backwards if you don't catch the orientation note in the picture.

[Spiffy50]

Checked it 3 times now and verified to be the same wiring as you had posted a few years back.