Cisco WAI-OC3-4SS
Cisco 4-Port OC-3c/STM-1 Port Adapter Module - 4 x OC-3c/STM-1 (WAI-OC3-4SS)
Cisco 4-Port OC-3c/STM-1 Port Adapter Module - 4 x OC-3c/STM-1 (WAI-OC3-4SS)