If you are certain he was with the 92 Signal Battalion (as opposed to the 92nd Signal Co.), and if he was with that unit at the end of the war, then there is a high probability that he participated in the liberation of Dachau. Did he ever mention this? At that point in the war, the 92nd Signal Battalion was providing communications either for the US 3rd Army or US XV Corps. I'm leaning towards XV Corps if they were forward enough to be able to claim the liberation of Dachau. There is come contention among various units as to who actually entered the camp first, with the 42nd Infantry Division making most noise about it. Was he in France/Germany or Italy?
Found it. That is the DUI of the 92nd Signal Battalion. 92nd SIGNAL BATTALION WW2 GERMAN THEATER MADE DI CREST | #152960972 Here is a crest made in theater:
Also, was he a replacement? The 92nd Signal Batt was credited with 5 campaigns. In your other thread, you show his EAME Campaign Ribbon with 4 Bronze campaign stars (not to be confused with the Bronze Star Medal). It is possible that if he wore this home, the authorization for a star the Central Europe Campaign (the 5th star) had not been authorized yet.
He landed at Normandy on June 12, 1944. He with the 92 signal battalion and had the 15th corps patch on his uniform. He wrote a letter to his mom and described the horror of Dachau and it was published in the hometown news paper in Ruston, Louisiana. I have that article. He like many others did not talk about it when he got home.