User manual

Appendix B. Connector Pinouts
61202156L1-1 TDU 120e User Manual B-3
Chain-Out
This is used to connect to another TDU/TSU family
multiplexer chain-in connector. See Table B-4 for the pinout
for the chain-out connector.
Craft Port
This is used as an EIA-232 port for connection to a computer
or modem (Control In) or to another TSU/TDU family
multiplexer or TSU 100 (Chain-In). See Table B-5 for the
pinout for the craft port connector.
Table B-4. Chain-Out Pinout
Pin Name Description
1
GND Ground - connected to unit chassis.
2
UNUSED
3
TX DATA Data transmitted to chained units by the
TDU 120e. Connect to RX DATA of the next
unit (chain-in pin 3).
4
UNUSED
5
RX DATA Data received from chained units by the
TDU 120e. Connect to TX DATA of the next
unit (chain-in pin 5).
6,7,8
UNUSED
Table B-5. Craft Port Pinout
Pin Name Description
1
GND Ground - connected to unit chassis
2
RTS Request to send - flow control
3
RXDATA Data received by the TDU 120e
4
UNUSED
5
TXDATA Data transmitted by the TDU 120e
6,7
UNUSED
8
CTS Clear to send-flow control