RFL SMX3 / 21
Page 18 of 22
Issue 1.4
User Manual
08 June 2009
11. LEDs
12 LEDs are located in the centre of the board for connection via flexible light pipes
to display locations. See equipment layout.
LED Colour
Function
1
Green
Power input 1
2
Green
Power input 2 (only where applicable)
3
Green
X.21 Data Port A Transmitting data
4
Green
X.21 Data Port A Receiving data
5 -
Not
used
6 -
Not
used
7
Green
V.24 Port B Transmitting data
8
Green
V.24 Port B Receiving data
9
Green
V.24 Port C Transmitting data
10
Green
V.24 Port C Receiving data
11
Red/Green X.21 Agg. channel – see following table
12
Red/Green Concatenation channel – see following table
Note: For units connected in a concatenated network, data on aggregate channels 2
and 3 is broadcast to all configured V.24 ports regardless of whether there is
equipment connected to those ports. In these cases Channel B and C Rx LEDs (viz.
data being transmitted from a DCE port) will signal green as traffic is carried.
LEDs 11 & 12 illuminate according to equipment and aggregate status on the
associated port. When communications are healthy, the LED should be solid green
for an enabled port.
X.21 Aggregate and Concatenation LED status
Display Condition
Off Port
disabled
Fast flash (3/s)
Configuration error
Slow flash (1/s)
No clock present
Steady
Bit timing locked to Master Clock - Healthy
Red
Aggregate frame not synchronised
Green
Aggregate frame synchronised - Healthy
Yellow
Yellow alarm (remote alarm)
11 12 2
1
6
3
4
8
7
5
10 9
X.21
V24
