Interfaces of the modem
98-175666-A
Chapter 3: Interfaces
3-6
3.2.3 RS-232 and RS-422 connectors
The modem has two RS-232 and one RS-422 connector for control information to and
from the ACU. See section
To connect the ADU, ACU and modem
on page 3-25 for details
how to connect the BDU to the modem.
Outline
(on the BDU)
Pin
number
Pin function
1
Inner conductor: 50 MHz clock, Rx/Tx
2
Outer conductor: GND (Shield)
Table 3-9: F connector, Rx and Tx, outline and pin assignment
Outline (on the modem)
Pin
Pin function
1
Not connected
2
BUC TXD
3
BUC RXD
4
Not connected
5
GND
6
Power good
7
GMU reset
8
Temperature out of range
9
Core module RSSI
Table 3-10: RS-232 connector, male, outline and pin assignment, modem
Outline (on the modem)
Pin
Pin function
1
GND
2
Key-line P
3
Reset P
4
GND
5
GND
6
Not connected
7
Key-line N
8
Reset N
9
Not connected
Table 3-11: RS-422 connector, male, outline and pin assignment, modem
1
5
6
9
1
5
6
9
