Siemens SCALANCE X-300 Manual page 113

NOTICE
Use media modules only in an approved modular device ("M")
Use an MM900 media module only in a device equipped with suitable slots for such
modules. Example: X308-2M.
The names and labeling of the media modules differ
 Example: The device is called, for example, "MM992-2SFP" [6GK5 992-2AS00-8AA0],
The connection of end devices or other network segments does not depend on the module
slot, but rather on the suitability of the MM900 media module.
Remember the orientation of media modules.
On modular devices (M), there are always two module slots arranged opposite each other.
Remember the correct orientation when installing MM900 media modules.
Example:
 The first MM900 media module is installed in slot 1.
 The second MM900 media module installed in slot 2 must be turned through 180
On modular devices for rack mounting, pairs of module slots are located one above the
other in which modules can be inserted in a specific order:
Example of a rack device:
 The first MM900 media module is installed in slot 1.
 The second MM900 media module installed in slot 7 must be turned through 180
Other modules are then inserted in slots 2 and 8 or 3 and 9 etc.
The permitted operating temperature is decided by the fully equipped device (switch +
media module + SFP transceiver).
With modular devices (M), it is not only the switch that decides the permitted operating
temperature of the overall device but also the temperature ranges of the MM900 media
modules and the SFP transceivers. You will find details in the technical specifications of the
relevant components.
The following aspects can restrict the maximum permitted operating temperature:
 The orientation of the carrier device.
 The use of SFP transceivers.
 The use of transceivers of the types LH, LH+ or ELH.
SCALANCE X-300
Operating Instructions, 10/2010, A5E01113043-10
the labeling on the device is "9922AS". You will find detailed information on the labeling
of the media modules in the section "MM900 media modules".
CAUTION
degrees.
degrees.
5.3 Inserting media modules and SFP transceivers
Installation
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