Adtran is entering a joint manufacturing deal with the Arab Organization for Industrialization (AOI,) a large manufacturer controlled by the Egyptian military. AOI assembles tanks and jet aircraft. It produces AK-47's. The company is diversifying into solar energy and communications. A GPON box is much simpler than a supersonic jet; Egypt should have no problem with the manufacture.
Egypt has a strong industrial base that was first developed by Muhammad Ali at the beginning of the 19th century. It was stifled under British colonization until 1952. It exports widely and has respected universities.
As Chinese wages have gone up, manufacturers have been moving to find lower labor costs. Vietnam has enjoyed a mini-boom. Egypt's nominal per capita income is about midway between Vietnam and China, low enough that wages will be competitive.
For the last two years, FTTH has increased by 20% or more each year.