Specifications

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AS/CA S002:2010 COPYRIGHT
OCTOBER 2010
TABLE 2
Standard ten-pushbuttons keypad
arrangement and numbering
1 2 3
4 5 6
7 8 9
* 0 #
Note: The ‘*’ and ‘#’ symbols are commonly known as ‘star’ and ‘hash’
respectively.
5.1.6.4 Where letters, in addition to numerals, appear on a keypad or rotary
dial, or its surround, the Letters and numerals shall
—
(a) conform to the associations given in Table 3;
(b) be unambiguously associated with the relevant keys; and
(c) have a distinct difference in style between the numeric zero
and the letter ‘O’.
Note: The inclusion of a slash across numeric zero is optional.
Compliance with Clause 5.1.6 should be checked by inspection.
TABLE 3
Alphanumeric mapping
1 2 ABC 3 DEF
4 GHI 5 JKL 6 MNO
7 PQRS 8 TUV 9 WXYZ
* 0 #
Note: Inclusion of alphabetic characters on keypads/dials is optional.
5.1.7 Insulation resistance of ring-in/loop-out PSTN lines
5.1.7.1
CE in the OFF-LINE state, except as provided for in Clauses 5.1.7.2
and 5.1.7.3, shall have an insulation resistance of not less than 1 MΩ
between
—
(a) the two line conductors;
(b) each line conductor and TRC terminal, if equipped; and
(c) each line conductor and PE terminals, if equipped
when tested with 250 V d.c. of each polarity, in series with a 600 kΩ
resistance.
Compliance should be checked by measuring the DC resistance
between the line conductors and between each line conductor
and the TRC terminal and the power supply protective earth