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APPENDIX C
M-LEAD SIGNALING INTERFACES
OVERVIEW
Figures C-1 through C-7 represent M-lead signaling interface diagrams
for GDC voice channel card types to external equipment.
TYPE-I SIGNALING
X1 ON CELP MODULE
X1 ON VOICE II/ASP CHANNEL MODULE AND UNIVERSAL
VOICE CARD
X1 ON VLBRV CHANNEL MODULE
X4 ON UNIVERSAL VOICE II/CVSD CHANNEL MODULE
X4 ON VOICE II/PCM & ADPCM CHANNEL MODULES
A
M-LEAD
SENSOR
(ISOLATED)
M-LEAD
OUT
GND
M
-12 V
- BATT
SB
N.C.
N.C.
-12 TO
-48 V
TERMINATING
EQUIPMENT
VOICE
CHANNEL
SG
M
PTC
BATT
BATT
M
GND
D
INT
INT
A
X2 ON CELP MODULE
X2 ON VOICE II/ASP CHANNEL MODULE AND UNIVERSAL
VOICE CARD
X2 ON VLBRV CHANNEL MODULE
X5 ON VOICE II/CVSD CHANNEL MODULE
X3 ON VOICE II/PCM & ADPCM CHANNEL MODULES
B
X3 ON CELP MODULE
X3 ON VOICE II/ASP CHANNEL MODULE AND UNIVERSAL
VOICE CARD
X3 ON VLBRV CHANNEL MODULE
X6 ON VOICE II/CVSD CHANNEL MODULE
X5 ON VOICE II/PCM & ADPCM CHANNEL MODULES
C
B
C
NOTE: X2, X6 AND X10 ON EAM-1 PIGGYBACK
BOARD IN U.S. POSITION.
X4 AND X9 ON UNIVERSAL VOICE CARD IN U.S.
POSITION.
+
—
IDLE
BUSY
8
3
2
15
FIGURE C-1. M-LEAD SIGNALING INTERFACE,
TYPE-I SIGNALING
C-1