OPTICAL SYSTEMS DESIGN
DOC ID: 10118201
OSD2139 OPERATOR MANUAL
PAGE 14
2.2.9
CONTROLS
The OSD2139 has an 8-way DIP switch on the front panel to control a number of functions. Table 5
outlines the function of each switch.
FIGURE 12: OSD2139 8-WAY DIP SWITCH
TABLE 5: OSD2139 8-WAY DIP SWITCH SETTINGS
SWITCH
NUMBER
DESCRIPTION
FUNCTION
SWITCH POSITION
1
Fiber Speed
1000Mbps
100Mbps
OFF*
ON
2
RS422/485
RS422
RS485
OFF*
ON
3
2-Wire/4-Wire
4-Wire
2-Wire
OFF*
ON
4, 5, 6
Data Speed Setting
See Table 6 below
7
Link Loss Forwarding
LLF Disabled
LLF Enabled
OFF*
ON
8
Not Used
Not Used
OFF*
* Default settings. Firmware update switch should remain in OFF position.
TABLE 6: OSD2139 SERIAL DATA SPEED SETTINGS
Switch
Number
DC to
10kbps
2.4kbps
4.8kbps
9.6kbps
19.2kbps
38.4kbps
57.6kbps
115.2kbps
4
0
0
0
0
1
1
1
1
5
0
0
1
1
0
0
1
1
6
0
1
0
1
0
1
0
1
Up Position
Down Position
Fiber Speed 100/1000
RS422/485
2-Wire/4-Wire
Data Speed Setting 1
Data Speed Setting 2
Data Speed Setting 3
Link Loss Forwarding
Not Used
1 2 3 4 5 6 7 8
