I'm sorry, I know nothing about the optix transport equipment
You can contact your company's contracted IT supplier(if you have one)
or just call their local retailer and suppose they will have a sales with you.
But are you sure you want to buy equipments which are made by Huawei which is a company by China?
For your information security sakes... I really don't recommend you buying any IT products which are manufactured by a company which comes from china.
The US government have been investigating about information safety