X142 40g Qsfp+ Mpo Sr4 Transceiver - Qsfp+ 4x 10gb, 850 Nm Laser That Provides 40gb Connectivity Up To 100 M (328 Ft) On Mmf - Has One Mpo Sr4 Connector (lt: 2-4d)
X142 40g Qsfp+ Lc Lr4 Single-mode Transceiver - Qsfp+ 4x 10gb 1310 Nm Laser That Provides 40gb Connectivity Up To 10 Km (6.21 Mi) On Smf - Has One Lc Lr4 40gb Port (lt: 2-4d)