The Hirschmann GRM20-ZZZZZZZZSZ9HHS module is a rack mount switch media module. It can be used to add 8 Fast Ethernet SFP slots to modular switches. It is available as an accessory from Hirschmann.

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Warranty: 1 year Networking-Hardware Warranty Included
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Repairs: We offer repair service for the GRM20-ZZZZZZZZSZ9HHS.
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The Hirschmann GRM20-ZZZZZZZZSZ9HHS module is a Greyhound Fast Ethernet media module. It can be added to a Hirschmann modular rack mount switch to increase the number of ports on the switch. There are a total of 8 Fast Ethernet SFP slots in the module. Single mode and multimode fiber SFPs can be used with the SFP slots on the GRM20-ZZZZZZZZSZ9HHS module. Standard single-mode SFPs support up to 20-kilometer communication distances with an 11 dB link budget. Long-haul single-mode SFPs support up to 80-kilometer communication distances with a 5 to 22 dB link budget. Multimode SFPs support 0 to 550-meter link distances with a 7.5 dB link budget. The power to the module is supplied from the switch on which it is installed. The power consumption rating of the GRM20-ZZZZZZZZSZ9HHS module is 9 Watts and the thermal dissipation rating of an operating GRM20-ZZZZZZZZSZ9HHS module is 31 BTU per hour.


The rated MTBF for the Hirschmann GRM20-ZZZZZZZZSZ9HHS rack mount switch media module is 33,626,288 hours or approximately 3,800 years. The operating temperature range for the module is 0 to 60 degrees Celsius and the tolerable operating relative humidity range is 5 to 95% without condensation. During storage and transportation, the GRM20-ZZZZZZZZSZ9HHS module requires an ambient temperature range from -40 to 70 degrees Celsius. The weight of the module is 650 grams. The environmental protection class of the module’s housing is IP 30. Safety instructions are supplied with the module and they should be read carefully by the technicians involved in the module’s installation. Furthermore, the instructions should be implemented carefully to prevent injury and equipment damage.  The GRM20-ZZZZZZZZSZ9HHS media module is compatible with Greyhound switches which are designed for use in harsh industrial environments.


Technical specifications


Rack Mount Switches


Media Module

8 FE/GE SFP Slots

3800 years

0 to 60 degrees Celsius

5 to 95%

9 Watts

650 grams

IP 30

From the Switch

-40 to 70 degrees Celsius


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