Clear-Com KB-702GM - Manual (Page 20)

K B - 7 0 2 / K B - 7 0 2 G M T W O - C H A N N E L S P E A K E R S T A T I O N S 3 - 2
BLOCK DIAGRAM FOR THE KB-702GM
Figure 3-8: KB-702GM Block Diagram
EQ/
LIM
Mic Select
Headset
Mic
Panel
Mic
Talk
Sidetone
Null
Call
Light
Call
Intercom
Volume
Red /
Green
Speaker
On/Off
TW Option Channel
Switch
Ch. A
Speaker
Power Ch. B
Call Send &
Receive RMK
Microprocessor
Talk/
VOX
Headset
Output
Balanced
Program
Input
Speaker
Dip
Program
Mute
Mic Dip /
Mute
VOX
Common
+30 VDC
Ground
Latch
Disable
Long Line
Program
Level
Call Alert
Tone Level
4-Wire
Input
4-Wire
Output
2-Wire / 4-Wire
Select
Rectifier 16 VAC Power
Ch. B
Ch. B
Ch. A
Ch. A 4-Wire
Option
Single
Chan.