What is the NEC X7153B?
The NEC X7153B is a network/telecom equipment component, listed by the manufacturer as "FOTS-HS XMT OPT". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
The X7153B is a network/telecom equipment component manufactured by NEC. Listed by the manufacturer as "FOTS-HS XMT OPT", it is available through Circular Telecom's surplus and refurbished network equipment marketplace as a sustainable, tested alternative to buying new.
Common Questions
The NEC X7153B is a network/telecom equipment component, listed by the manufacturer as "FOTS-HS XMT OPT". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
Circular Telecom sources and resells surplus and refurbished NEC network equipment, including parts such as the X7153B, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue