We have one internet lease connectivity customer 8Mb(1:1) bandwidth (At India) . They are accessing one FTP server at Atlanta(US) which they are using for upload/download files.
ON our Connectivity they are not getting upload speed transfer rate of not more then 200KB/sec. but as per customer while they were using other provider's connectivity 4Mb before our services they were getting 400-500KB/sec upload transfer rate.
However we have not yet varified the customer words (for proper upload rate on other providers connectivity). But is this possible to have this kind of problem i.e Just double response as compare to us.
We have almost checked our international peering (which is the best possible peering), routing , Transmission part from our NOC to customer premises.
Please suggest what to check now ..Will checking at Atlanta end customer network help us to solve the problem.