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Table 5. Data Interface Pinout (Continued)
Pin
Input/Output
Number
18
--
19
OUT
20
--
21
--
22
--
23
--
24
--
25
--
Figure 22. x790 to VOX Assembly Interconnect Diagram
Orderwire Connector—J9
The radio provides for an orderwire channel to facilitate communica-
tions between two associated MDS 4790/9790 radios. The jack accepts
a standard telephone handset with a carbon microphone and an RJ-11
connector-equipped cable.
on Page 27
for more information.
Alarm Contacts—J10
J10 is a plug-in terminal strip that provides connections for optional
alarm circuits.
Figure 23
from the rear panel.
MDS 4790/9790 Series I/O Guide
Pin Description
No Connection
14.0 Vdc Output. Provides a regulated supply
voltage at 1.5 A for low-power accessories.
No Connection
No Connection
No Connection
No Connection
Do not connect—Reserved for future use.
No Connection
See "Coordinating Activities by Orderwire"
shows the function of each terminal as viewed
MDS 05-3438A01, Rev. F
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