The Hirschmann Automation GMM42-TTTTTTTTSZ9HHS9 media module belongs to the Greyhound family of rack mount switches media modules. This module provides PoE+ support and it can operate in a standard temperature range. It comes with 8 ports in total.

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The GMM42-TTTTTTTTSZ9HHS9 module is a rack mount switch media module that supports the Ethernet and PoE+ networks. This media module has been designed by Hirschmann Automation and included in the Greyhound series. This module comes with 8 ports in total that use RJ45 connectors. The data transfer rate for these ports is 10 to 100 Mbits per second for normal operation. The Hirschmann Automation GMM42-TTTTTTTTSZ9HHS9 media module operates with single-mode fiber optic cables and TP cables which can be used according to the needs of the application or equipment. This media module can operate with both AC and DC nominal voltage. The AC voltage range is from 110 to 240 Volts AC at a frequency of 50 to 60 Hertz and the DC voltage range is from 60 to 250 Volts DC. The maximum voltage values must not be exceeded. This voltage is supplied by a separate power supply module that does not come shipped with the media module or the rack mount switch.


The Hirschmann Automation GMM42-TTTTTTTTSZ9HHS9 rack mount switches media module has a backup fuse for each voltage input and the connection mechanism is a 3-pin terminal block. This media module is meant to be installed in a protective cabinet and it can withstand operating temperature ranges from 0 to 60 degrees Celsius. The settings of the Hirschmann Automation GMM42-TTTTTTTTSZ9HHS9 media module can be configured through a V.24 interface connection, through the HiDiscovery protocol by using the HiDiscovery software or the HiVision software in its industrial version, through the BOOTP protocol, through the DHCP protocol, and through an autoconfiguration adapter. The default settings on the Hirschmann Automation GMM42-TTTTTTTTSZ9HHS9 media module which can be customized are the IP address, the password for management, the login, the V.24 data rates, the ring redundancy, and the Ethernet port settings.


Technical specifications


Rack Mount Switches


Media Module





Twisted-pais (RJ45 connector)

-40 to 70 degrees Celsius

Hirschmann Standard



Common misspellings:

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