Keypad
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ITU-T E.161 recommendation that can be used for phoneword (naambellen) and T9 (predictive text):
1
2
abc
abc
3
def
def
A
FO
FO
4
ghi
ghi
5
jkl
jkl
6
mno
mno
B
F
F
7
pqrs
pqrs
8
tuv
tuv
9
wxyz
wxyz
C
I
I
*
+
+
0
␣
␣
#
⇫
⇫
D
P
P
- FO: Flash override (AUTOVON)
- F: Flash (AUTOVON)
- I: Immediate (AUTOVON)
- P: Priority (AUTOVON)
- KP: Key Pulse (MF, R1)
- ST: Start (MF, R1)
- DTMF (Dual Tone Multi Frequency, a.k.a. Touch-Tone) is standardized in the ITU-T Recommendation as Q.23, and is also known in the UK as MF4 [1]
- AUTOVON (military designation 490-L) [2]
- MF (Multi Frequency signaling, a.k.a. R1) [3]
Also see [4]
