"Though the industry is gearing up, the lack of ability to test on 112 is a dampener and without validation it is not possible to go ahead," mobile devices industry body Indian Cellular Association National President Pankaj Mohindroo said in a letter to Telecom Secretary J S Deepak.
The letter claimed there was also delay on part of mobile service providers as during tests most of the operators could not connect calls to 112 while some networks did not recognise the number.
Simultaneously, the government has approved single emergency number '112' which is proposed to be operational throughout India from January 1 to help people reach services of police, ambulance and fire department easily in emergency.
All existing emergency numbers will be phased out within a year of roll out of 112, depending upon the awareness about this new facility.
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In India, different emergency communication and response systems are in place such as 100 for police, 101 for fire brigade, 102 for ambulance and 108 for Emergency Disaster Management.
"Since it's (112) not available, we anticipate a delay in meeting the deadline of January 1, 2017," he said.
Mobile vendors carried out tests in Delhi circle but none of the network, except MTNL, connected calls to 112.
MTNL directed call made on 112 to Delhi Police Control room while Reliance Communications GSM and Idea Cellular auto-response suggested to dial 100 for police.
The letter claimed that during the tests, Vodafone, RCom and MTS networks did not recognise the number, while Aircel and Airtel could not connect the call. There was busy tone on Tata's network.
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