Interfaces of the modem
98-175666-C Chapter 3: Interfaces 3-7
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 BDU. See section Connection between ADU, BDU and modem on page 2-26 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
1 5
6 9
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