HP - JD581C - Flexible Interface Card OC-3/STM-1 WAN JD581C - HP - Flexible Interface Card 1 x OC-3/STM-1 WAN $235.42 $191.40
HP - JD633A - Interface Card Single-Port SFP OC-3c STM-1c ATM JD633A - HP - Single-Port SFP OC-3c/STM-1c ATM Flexible Interface Card FIC Module for MSR50 Router $1,186.70 $964.80
Cisco - 15454OC121IR1310RF - Optical Interface Card 1-Port OC-12 STM-4 15454OC121IR1310RF - Cisco - 1-Port OC-12/STM-4 Optical Interface Card $359.97 $305.06
Juniper - I-1OC48-SON-SFP - Interface Card 1-Port OC-48 SFP I-1OC48-SON-SFP - Juniper Networks - 1-Port OC-48 Interface Card 1 x OC-48 1 x SFP Interface Module $475.60 $403.05
HP - JD538A - Smart Interface Card 1-Port Fractional WAN JD538A - HP - 1-Port Fractional Smart Interface Card 1 x WAN $154.03 $130.53