A SERVICE OF

logo

External Connectors 11
E-EQ-HX1RG-C-ARC HX1 Reference Guide
External Connectors
25 pin RS-232 Connector for Headset
The HX1 has a female “D” connector to attach the lower audio cable.
Figure 2-5 The 25-Pin RS-232 Connector
The headset adapter cable has a corresponding 25 pin male connector on one end. The other end
of the headset cable provides for attaching the user’s choice of headset.
To attach the adapter cable, align the pins on the connectors and tighten the thumbscrews. Do not
over tighten.
Pinout
Pin Signal Pin Signal
1 Not used 14 Not used
2 Not used 15 Not used
3 Not used 16 Not used
4 Not used 17 In_1
5 Ground 18 In_2
6 IO_1 19 In_3
7 IO_2 20 Not used
8 Vcc2 +5V 21 Not used
9 Not used 22 Not used
10 Not used 23 Analog Ground
11 Mic – 24 Phone R
12 Mic + 25 Phone L
13 Not used