Nera F77, Installation Manual

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39
INSTALLATION
Nera F77
Continuing the Saturn tradition
Pin Mne-
Circuit DIN
CCITT Signal
Description
number monic circuit source
1 CD 109 DCE Carrier detect
2 RXD BB D1 104 DTE Received Data
3 TXD BA D2 103 DCE Transmitted Data
4 DTR 108 DTE Data terminal ready
5 GND 102 Signal ground
6 DSR 107 DCE Data set ready
7 RTS CA S2 105 DTE Request To Send
8 CTS CB M2 106 DCE Clear To Send
9 RI 125 DCE Ring indicator
5 4 3 2 1
9 8 7 6
The driver used with the RS-232 B (DATA) port can
be switched to be used with the RS-422 (DATA) port
instead, see the User Manual.
TEL
4
ISDN RS-422 TEL
2
ISDN
ISDN ISDN
ISDN
SILENCE
SW IND
NMEA NMEA
TEL
1
TEL
3
ISDN ISDN
TEL 3 USB RS-232
B
TEL 4
RS-232
A
ISDN
TX TX RX RX
TEL
4
TX TX RX RX
TX TX
RX RX
TX TX
RX RX
TX TX
RX RX
PC serial port
DTE
PC serial port
Max 100 metres
USB port
PC - asynchronous data communication
102 Signal Ground
Digital ground, return line.
103 Send Data
Data transmitted from DTE (PC) to DCE (Nera F77).
104 Receive data
Data Received from DCE (Nera F77) to DTE (PC).
105 Request To Send
OFF requests DCE (Nera F77) to suspend transmission to DTE (PC).
ON requests DCE (Nera F77) to resume transmission to DTE (PC).
106 Clear to send
OFF indicates that DCE (Nera F77) cannot accept data from DTE (PC).
ON indicates that DCE (Nera F77) is prepared to accept data from DTE (PC).
107 Data Set Ready
Signal from Nera F77 that when ON indicates that a data call setup is in progress.
108 Data Terminal Ready
Signal from PC. This signal is used in the Hotline mode and indicate when going from OFF to ON that
the PC wants to make a data call. The PC clears the call by setting the signal from ON to OFF.
109 Receive Signal Indicator
Signal from Nera F77 that when ON indicates that connection is established and received data will be
delivered on circuit 104, Received Data.
125 Ring Indicator
Signal from Nera F77. This signal is used in the Auto answer OFF mode and when ON indicates that
an incoming call is in progress. The signal will go OFF when the call is answered by the PC by turning
circuit 108 Data Terminal Ready ON.
RS-232 connector pin assignments
Signal source DTE means
that the signal goes from the
PC to Nera F77.
Signal source DCE means
that the signal goes from
Nera F77 to the PC.
Signal descriptions