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TC12 Installation, Commissioning & Maintenance Handbook
666/HE/43100/000
Page 68
Issue 10
Table 5 - OTU Line Level Switch (S3)
OUTPUT
POWER
SWITCH NUMBERS
1 2 3 4 5 6
0 dB
1 0 0 0
-3 dB
1 0 0 1 SEE
BELOW
-6 dB
0 1 0 0
-9 dB
0 1 0 1
-10 dB
0 0 1 0
-13 dB
0
0
0
0
-16 dB
0
0
0
1
Å
Æ
RECEIVE
THRESHOLD
-42 dB
0
0
-39 dB
0
1
-33 dB
SEE ABOVE
1
0
= Setting for the UK
0 = Switch Open
1 = Switch Closed
3.2.2.4 Configuring the Jumpers on the Outstation PCB Daughter Card
A daughter card must be factory fitted to the Outstation PCB (see Figure 19)
where RS232 communications to an Instation is required. RS232 or normal
telephone line communications via modems is selectable with the daughter card
fitted.
There are 3 jumper triples (LK1, LK2 and LK3) on the daughter card. The jumpers
must be selected as in Figure 23.
2 1 3 2 1 3
2 1 3
2 1 3 2 1 3
2 1 3
LK3 LK2
LK3 LK2
LK1
LK1
Modem Operation RS232
Operation
Figure 23 - Modem Daughter Card Jumper Positions