Section: 10.5.4.17 Keypad facility
Content: The purpose of the keypad facility information element is to convey IA5 characters, e.g. entered by means of a terminal keypad (see note). The keypad facility information element is coded as shown in figure 10.5.103/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] . The keypad facility is a type 3 information element with 2 octets length. Figure 10.5.103/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  Keypad facility information element NOTE: In the 3GPP system this information element is only used to transfer one DTMF digit (0, 1, ... , 9, A, B, C, D, *, #) as one IA5 character.