10-4-121. Pay phones to be converted to allow emergency calls without charge. Every provider of telephone service or other owner of a pay station telephone in an area served by an emergency telephone system established pursuant to 10-4-103 must convert every pay station telephone to permit dialing 9-1-1 or the telephone company operator without deposit of a coin or other charge to the caller. Conversion must be completed by or before the time the emergency telephone system is operational.