AASTRA BluStar 8000i BAS-Mode Administrator Guides EN - Manual (Page 152)

Using a Serial Cable
11-2 41-001391-00 Rev 03 – 04.2012
Using a Serial Cable
The use of a serial cable is not absolutely necessary, but adds much more versatility to an HA Server pair.
1. Install a null-modem serial cable between the two servers. Connect the cable to the first serial port (COM1) in each
case.
2. Monitor the BluStar HA log file to see if the serial cable was detected.
3. To manually verify connectivity in one direction, enter on the first server:
cat /dev/ttyS0
4. Enter on the second server:
echo “test” > /dev/ttyS0
The word "test" should appear on the screen of the first server if the cable has been connected correctly.
5. To verify connectivity in the other direction, enter on the second server:
cat /dev/ttyS0
6. Enter on the first server:
echo "test" > /dev/ttyS0