While sentencing MTNL employees Ashok Kumar Singh, 55 and Ashok Rai, 51 and their accomplices Neeraj Narang and Mohd Irfan to jail terms, Special Judge N K Sharma also imposed a fine of Rs 90,000 on each of them.
All the four were held guilty of cheating and committing criminal conspiracy under the IPC besides committing various other offences under the Indian Telegraph Act.
According to the CBI, the case against the four was registered in March 1993 on MTNL Vigilance Officer R K Saini's complaint, which said one R K Gera and some other persons were running an unauthorised STD/ISD/PCO at Gera's house at Daya Nagar here.
On raiding Gera's residence, it was found that an STD/ISD facility was being provided at Rs 20 per minute by diverting calls to a number issued to him.
The calls were being diverted by tampering with the phone lines from within the Nehru Place Telephone Exchange, the agency said.
Explaining the involvement of the four accused in the act, the agency said Narang used to provide the instruments and the proceeds collected were divided among the four.
Gera, however, had been pardoned by a magisterial court in March 1995 after he turned approver.
The CBI found that from March 1 to March 26, 1993, a total of 6,87,472 calls worth Rs 7,56,037 were made from this unauthorised STD booth, causing as much loss to MTNL.
Narang, Singh and Rai have been granted bail till January 4, 2013 to appeal against their conviction and sentencing while Mohd Irfan has been given time to seek bail.
