
3-18 Ringing in Series II peripherals
297-1001-131 Standard 06.01 October 2000
Figure 3-6 Detailed ringing schematic
RG1
R
T
–48V
+48V
–130V
+130V
61A
61B
62A
62B
47B
48B
47A
48A
R49
K1
K3
K2
K4
K9
Current
detector
K5 K6
K10
6X53AAin Unit 1
64A
64B
65A
65B
50A–54A
50B–54B
55A–59A
55B–59B
K2K1
K5
K4
74B
74A
75B
75A
76B
76A
77B
77A
R
T
R
T
NT6X54AA
RG0
R
T
–48V
+48V
–130V
+130V
61A
61B
62A
62B
47B
48B
47A
48A
R49
K1
K3
K2
K4
K9
Current
detector
K5 K6
K10
6X53AAin Unit 0
64A
64B
65A
65B
50A–54A
50B–54B
55A–59A
55B–59B
K2K1
K5K4
74B
74A
75B
75A
76B
76A
77B
77A
R
T
R
T
NT6X54AA
in drawers 0–9
in drawers 10–19
RA
RB
RB
RA
Ring bus
Even LSG
Ring bus
Odd LSG
Ring bus
Even LSG
Ring bus
Odd
LSG
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