Section 7. Quick Reference
7-2
Table 7-2 Zetron Tone Groups 8 to 14
Zetron Group No.
Mfr. Tone Groups
8
Mot B
9
Mot Z
10
GE A'
11
GE B'
12
GE C'
13
Mot 10
14
Mot 11
T 0
371.5
346.7
682.5
652.5
667.5
1472.9
1930.2
O 1
412.1
384.6
592.5
607.5
712.5
1513.5
1989.0
N 2
457.1
426.6
757.5
787.5
772.5
1555.2
2043.8
E 3
507.0
473.2
802.5
832.5
817.5
1598.0
2094.5
4
562.3
524.8
847.5
877.5
862.5
1642.0
2155.6
N 5
623.7
582.1
892.5
922.5
907.5
1687.2
2212.2
U 6
691.8
645.7
937.5
967.5
952.5
1733.7
2271.7
M 7
767.4
716.1
547.5
517.5
532.5
1781.5
2334.6
B 8
851.1
794.3
727.5
562.5
577.5
1830.5
2401.0
E 9
944.1
881.0
637.5
697.5
622.5
1881.0
2468.2
R
Diagonal
979.9
979.9
742.5
742.5
742.5
none
none
Two-Tone Timing
The standard two-tone timings are listed in Table 7-3.
Table 7-3 Standard Two-Tone Timings
1st
Gap
2nd
Group Call
Type
1.0
0
3.0
8.0
GE std, Mot std Tone+Voice
0.4
0
0.8
8.0
Motorola Tone Only
1.0
0
3.0
6.0
NEC-B
1.0
0.3
3.0
6.0
NEC-A
1.0
0
1.0
4.0
NEC-C
0.4
0
0.8
4.0
NEC-M
0.5
0
0.5
3.0
NEC-L
0.4
0
0.4
3.0
NEC-D
Code Plans
Each pager contains two reeds, and because 140 frequencies are available for each reed, there
are about 19,600 possible reed combinations. To bring order to the reed coding process, the
possible combinations are organized into groups of 1000 pager codes known as “code plans”
(see Table 7-4 through Table 7-6). About 25 conventional code plans have been created from
the different combinations of the 140 tones. There is a Mot B code plan, a Mot C code plan,
and so on.
