Do you stillhae the problem. I know its a bit tricky. but i got good support from RTX, If you neet. i can send you the instruction. I have got 2 of them and they work nicely. I love them, because have the possibility to use through skype or by fix line. But the start maybe a bit difficult.
My problem with Rtx is that the base station worked for 10 hours only. Seems like is not powered. A really bad product. Obv, i checked out if everything was connected.
I had exactly the same issues with the base. It worked for the first 10 hours or so and then stopped indifinetely. I quickly figured this out as I was a happy customer of their previous 3088 phone. I was so upset thinking 4088 was simply poorly executed. I have contacted RTX and they told me to contact the seller as the product was new. I contacted the seller and sent the product back, while he replaced it. The new, replaced 4088 works flawlessy for more than one year already.