Table of Contents
Advertisement
66
Telco Connector Pin
1
2
3
4
5
6
7
8
9
10
MTM5400 Mobile Terminal Installation Manual
1
10
10-Pin Telco Connector
25-Pi n Back Connector
Figure 29 View of the Enhanced Control Head's rear connectors
Table 14 10-Pin Telco Connector
Function
AUDIO +
NC
BUS +
AUDIO -
NC
GND
Radio On/Off Control
SCI_TX
FLT_A +
Analog Ground
13
25
Description
Balanced Audio + (Bidirectional)
Not Connected
This is used for communication between the radio and an
Enhanced Control Head.
Balanced Audio - (Bidirectional)
Not Connected
This is the Enhanced Control Head service request input.
A level of 5 volts indicates that the Enhanced Control Head
needs to communicate with the radio. In addition it
switches on the radio's voltage regulators. The idle state is
a level below 0.6V.
This if for communication between the radio and the
Enhanced Control Head.
This voltage is at battery voltage level and is available as
long as the radio is connected to the supply voltage. The
maximum current is 300mA. A fuse in the radio prevents
further circuit damage in case of shorting this pin to
Analog Ground
INSTALLATION
1
14
Ground
ground.
Advertisement
Table of Contents
