Datasheet: http://www.juniper.net/assets/de/de/local/pdf/datasheets/1000600-en.pdf
10/100 Mbps not supported; and only 1000Mbps supported; documented here: https://www.juniper.net/documentation/en_US/release-independent/junos/topics/reference/specifications/services-gateway-srx4100-supported-transceivers.html