Siemens SCALANCE X308-2M Operating Instructions Manual page 77

Possible attachments
The MM991-2 media module has the following:
● 2 x100 Mbps, BFOC port optical (multimode, glass) up to max. 3 km
[Device labeling in square brackets]
Possible attachments
The MM991-2LD media module has the following:
● 2 x 100 Mbps, BFOC port optical, (single mode glass), up to max. 26 km
[Device labeling in square brackets]
Possible attachments
The MM991-2 (SC) media module has the following:
● 2 x 100 Mbps, SC port optical, (multimode glass), up to max. 3 km
[Device labeling in square brackets]
SCALANCE X-300
Operating Instructions, 02/2012, A5E01113043-12
Figure 4-29 MM991-2 [9912AB]
Figure 4-30 MM991-2LD [9912AC]
Figure 4-31 MM991-2 (SC) [9912AD]
Description of the device
4.2 Product groups
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