24
SATEL OY
// SATELLAR MANUAL // RADIO UNIT // USER GUIDE // V. 1.8
5. Interfaces
3
5.1 Serial data
The RU provides two ports, both using D9 female connectors. One port is intended for RS-232 com-
munication and hosts a full set of RS-232 signals including handshakes. The other port is intended for
RS-422/485 communication via differential pair data signals. The RS-232 port can be used for data and / or
NMS communication. The RS-422/485 port can be used for data only.
Communication settings can be done by modifying user settings. SATELLAR Y-cable is needed for simulta-
neous RS-232 data and NMS connections in RS-232 port.
The serial interface uses asynchronous data format.
Supported serial port speeds, QAM:
- Transparent dataflow –mode: 9600, 19200, 38400, 57600, 115200, 128000, 230400, 256000 bps
- Packet Routing –mode: 9600, 19200, 38400, 57600, 115200 bps
Supported serial port speeds, FSK:
- Transparent-, and Source Routing –mode: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
- Packet Routing –mode: 1200*, 2400*, 4800*, 9600, 19200, 38400, 57600, 115200 bps
The following additional RS port settings can be used in Packet Routing –mode (unlike Transparent-, and
Source Routing –modes):
- Port Data Bits: 8
- Port Stop Bits: 1
*) Supported only in RS232
For other data port settings, please contact SATEL technical support.
5.1.1 RS-232
This interface can be used as data and/or NMS interface for RU. RS-232 interface port provides standard
D9 pin-out for DCE (TIA/EIA-574) as shown in the table below.
Pin nr
Pin name
Pin description
1
CD
Explained in chapter 6.6.2
2
RD
Receive Data: data traffic from the RU to the DTE
3
TD
Transmit Data: data traffic from the DTE to the RU
4
DTR
DTR function is not in use in the RU
5
SGND
Signal Ground: the common voltage reference between the DTE and the RU
6
DSR
Data Set Ready: an indication from the RU to the DTE that the RU is powered on
7
RTS
Explained in chapter 6.6.2
8
CTS
Explained in chapter 6.6.2
9
NC
Not Connected
D9 SHIELD
-
Connected to device ground
Table 5.1
RS-232, pin-out of D9 connector