Categories: Ahmedabad

Gujarat: Jalan CG Route 43 lakh calls cannot be rejected

Ahmedabad: Illegal international telephone exchange racquets based on CG road, based on session initiation protocols (SIP), popular internet telephone protocols using cloud-based services, are the first-of-type in this country.
A Ahmedabad crime branch team and officials of the Telecommunications Department (DOT) are now digging racquets that have serious security implications.
Kingpin from the racket, identified only as ‘Shereriyar’, comes from Dhaka in Bangladesh.
Police said he facilitated the formation of exchanges, some of them routed a large number of international calls from Pakistan, India and Bangladesh.
Observation notifications have been issued for Shereriyar, which according to the police are now based in Dubai.
In addition, these calls also cause huge losses for telecommunications companies.
“We can get a call record of only around 1,098 SIP lines.
One line can hold 1,000 calls at once,” the officer said.
“The initial target is to uncover the details of 2,700 calls at all.
Analysis can reveal more information.
This 43 lakh call might be the top of the iceberg.” The racket was excavated after the officer received the input that a resident of Sarkhej, Tabrez Kataria, operated illegal telephone exchanges.
VoIP Calls (Voice Over Internet Protocol) are converted to GSM (global system for cellular communication) calls for countries where internet phones are set.
Kataria, with the help of a Kerala-based man, uses the SIP line to provide this illegal service to their main operators in the Gulf.
Then, it was determined that a resident of Dubai, Rafiq Babu, was among the accomplice.
Investigations further exposed the racket link to Shereriyar, which police said had a connection in the UAE telecommunications company.
Investigators have concluded that he gave a calling card to several workers working in the UAE and other Gulf countries.
As for the 43 lakh call, checking the details of all the conversations is humanely impossible, said a police officer.
“This call, which cannot be recorded, may have been used to carry out the blackmail or hawala racket,” the officer said.
“Even worse, they can relate to operations that have a threat to the country’s internal security.” Officers added: “We have strong concerns that the Hawala Mafia uses this exchange.” While explaining the transfer of SIP-based VoIP calls, the official said, “SIP does not work alone during VoIP calls.
Some other protocols work together to ensure sound data reaches its goals.
Protocol Description Session (SDP) is one of them the protocol.” SIP is connected with the IP endpoint to share signaling details, while SDP sends information regarding sessions to help participants in joining or receiving detail sessions.
This transmits three types of data: session description, time description and description of the media, the officer explained.
“SDP does not transfer this information.
The description of the session is also supplied as a charge in sip communication.
Before being sent over the network, speech data is encoded using the codec, which changes audio impulses into binary data.
Many codecs are used for this purpose,” he added.

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