The 2nd Alpine Signal Regiment is an expeditionary signals regiment of the Italian Army based in Bolzano in South Tyrol that specializes in mountain warfare. Since 1951, the unit has been assigned of the 4th Alpine Army Corps and has therefore a strong association with the Italian Army's mountain infantry speciality, the Alpini, with whom the regiment shares the distinctive Cappello Alpino. The unit was first active from 1926 to 1932 as 2nd Radio-Telegraphers Regiment.
In 1952, the unit was reformed as a battalion and given the number IV, which had been used by two signal battalions during World War II. During the Cold War the battalion was assigned to the IV Army Corps. In 1975, the battalion was named for the Gardena Pass and assigned the flag and traditions of the 2nd Radio-Telegraphers Regiment. In 1992, the battalion lost its autonomy and entered the reformed 2nd Signal Regiment. In 2001, the regiment reformed the Signal Battalion "Pordoi" as its second signal battalion. The regiment is assigned to the army's Signal Command and affiliated with the Alpine Troops Command. The regiment's anniversary falls, as for all signal units, on 20 June 1918, the day the Austro-Hungarian Army began its retreat across the Piave river during the Second Battle of the Piave River.