What is Grey Traffic? Telephone companies in different countries use a variety of International telecom routes to send traffic to each other, These can be White, Grey or Black.
White is, in the telecommunications business, is a route in which both source and destination are legal terminations. The black route which is a route that is illegal in both ends while the Grey route which defines a route that is legal for one country or the party on one end, but illegal on the alternative end.

Grey routes are arrangements that fall outside the regular course of business between the licensed telecoms companies in each country. The grey part of the route is usually at the far end where the call is terminated. Up to that point, there are normal arrangements to deliver the call from the subscriber to the sending carrier and between the sending carrier and the satellite or cable operator for the trunk part of the call. The grey-ness arises because at the far end the call is made to appear as if it originates locally, as a domestic call, rather than a more expensive international call. This is the reason why we get an international call with the domestic number.
So, come to the main reason why the Grey Traffic is highlighted in the post is that It is a type of corruption happening in Pakistan, which causes loss of more than 1 billion dollars yearly.
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According to the committee, PTA does not have the capability to monitor the incoming and outgoing calls traffic which is causing a loss of $ 1 billion per annum. PTA is only capable of monitoring 13% of the traffic, the committee learned.
Recently PTA (Pakistan Telecommunication Authority) Taken serious action against Grey Traffic and Started Toll-Free number and SMS to report such cases in Pakistan, In this screenshot, you can see clearly the Numbers where to report, free of cost.
In recent months, the PTA has launched a nation-wide effort to curb down on illegal International calls. Through fraudulent processes, some parties allow for calls to be made Internationally but charged at local rates. The result is that the government of Pakistan is losing a considerable amount of revenue because of these practices. As responsible citizens of Pakistan, it is your duty to report a call originating from abroad but displaying a local number to the authorities.
To this effect, the PTA has set up a toll-free hotline that can be reached at 0800 55055 that you can call. You may also send an SMS, free of cost, to 8866 to inform the PTA about any International calls that seem suspicious to you.
Don’t forget to report.