also: たんしゅくダイアル
noun
speed dialing
A telephone feature that allows dialing a stored number by pressing a short code or a single button. Common in computing and telephony contexts.
よくかける番号は短縮ダイヤルに登録してある。
Frequently called numbers are registered for speed dialing.
短縮
Using speed dialing saves you from having to press a long number each time.