GAI-Tronics 10959-201 and 10959-203 Wall-mount Audio Messenger Interface - Manual (Page 14)

Pub. 42004-403F
M ODEL 10959-201 AND -203 W ALL -M OUNT A UDIO M ESSENGER I NTERFACES P AGE 12 of 20
f:\standard ioms - current release\42004 instr. manuals\42004-403f.doc
11/13
Table 8. Termination PCBA Jumper Functions
Jumper Output Position Function
P1 TB3-5, 6
Audio bus 1
1-2 600-ohm resistor connected (ADVANCE position)
2-3 Default: unterminated
P5 TB3-1, 2
600 ohms
1-2
600-ohm resistor connected (ADVANCE position)
2-3 Default: unterminated
P6 TB3-3, 4
Audio bus 2
1-2
600-ohm resistor connected (ADVANCE position)
2-3 Default: unterminated
P11 TB4-7, 8
Audio contact
1-2 Supervision resistor network, 4.7k in series, 15k in parallel
(ADVANCE position)
2-3 Default: unsupervised
Figure 4. Termination PCBA