Agilent HP 83486A. Plug-in: For 1310 and 1550 nm applications, this plug-in has a 2.5 GHz optical channel with 155 and 622 Mb/s switchable filters for SDH / SONET / ATM applications or 1063 and 1250 Mb/s switchable filters for Fibre Channel and Gigabit Ethernet.