What is a call sign?
A call sign is the unique identification assigned to a radio station or operator. It tells other stations who is transmitting. The Government assigns the call sign when it grants the ASOC.
Use only the assigned call sign
An operator must not invent a call sign, borrow another operator's call sign or transmit with false identification. The call sign shown in the certificate must be used as required by the rules.
When must the call sign be sent?
Under Annexure A of the 2024 Rules, the call sign must be sent at the beginning and end of each period of transmission. If a period lasts more than ten minutes, the call sign must be repeated during that period.
Why identify regularly?
Identification lets other operators and monitoring authorities identify the source of a transmission. It also supports accountability and helps resolve interference reports.
Indian call-sign prefixes
Indian amateur call signs commonly use the national prefix series assigned to India, including VU and AT forms. The full call sign is individually assigned. Do not assume that a prefix alone identifies the operator or grants a particular privilege.
Phonetic spelling
When a call sign is difficult to understand, spell it using the international phonetic alphabet. For example, VU3DXR may be spoken as Victor Uniform Three Delta X-ray Romeo.
Special event call signs
A special call sign may be assigned for a specific event under Rule 13. It is valid only for the approved event period and conditions. An operator must not create or use a special event call sign without the required assignment.
Portable and mobile identification
When operating away from the normal station location, follow the location and identification conditions in the current authorisation. Keep the temporary location details in the station log where required.