valentin
Valentin Grempka
Telecom Engineer focused on DWDM and optical transmission. Senior Technical Service Engineer at Adtran.
France
Browse others (15)
![]() |
hugocampossanoma Hugo Campos |
![]() |
nicholas4182 Nicholas |
![]() |
agentfll Jordan Jeffries |
![]() |
ta_tanaka_eimee 田中 大成 |
![]() |
ykasper Yurii Kasper |
![]() |
antonsotirov anton sotirov |
![]() |
bharatjangir Bharat Jangir |
![]() |
avongdara Akia Vongdara |
![]() |
band William L. Anderson |