TT15 not pairing with Alpha100 after deletion from the list

**jocanedd** · 30th August 2023, 09:57 AM

I have an Alpha100 that was paired with a TT15 collar. I accidentally deleted it and now there is no way to add it. I tried with two other Alpha100 and one Alpha200 and it won't work.

Only the Astro320 pairs and sends data normally

I also tried Master reset and all possible firmwares

T5,TT15_230.rgn
T5,TT15_250.rgn
T5,TT15_300.rgn
T5,TT15_310.rgn
T5_TT15_470.rgn

the Alpha100 pairs with other collars without a problem

so, it worked normally until I deleted it and now I can't add it at all

Has anyone had such a problem and knows how to solve it

Spoiler: images

**dstaisey** · 6th October 2023, 09:53 PM

It could be related to pairing with Astro 320. Though, it supports working with Astro 320 it uses different signaling modulation and it often happens that it gets stacked paired to Astro 320 and moving back to Alpha 100 or newer will not work. It could be that Garmin cured this issue with 5.00 firmware that was released on September 26th 2023.