...increasing numbers of dedicated circuits per router include a Channelized STM-1 to E1 for global markets, long-haulGigabit Ethernet, and Multilink Services, in addition to the existing Channelized DS-3 interface. Thus, service providers...
http://www.juniper.net/company/presscenter/pr/2001/pr-010515.html
...module lets you deploy additional gigabit media such as 1000BASE-SX, 1000BASE-LX, and 1000BASE-LH70 (long-haulGigabit Ethernet) in the same platform. Please let us know if you have any questions regarding the 3com 3C17701 4924 switch...
http://www.mtmnet.com/3C17701_Refurb.htm