47 CFR §64.1300

1. (a)For purposes of this subpart, a Completing Carrier is a long distance carrier or switch-based long distance reseller that completes a coinless access code or subscriber toll-free payphone call or a local exchange carrier that completes a local, coinless access code or subscriber toll-free payphone call.
2. (b)Except as provided herein, a Completing Carrier that completes a coinless access code or subscriber toll-free payphone call from a switch that the Completing Carrier either owns or leases shall compensate the payphone service provider for that call at a rate agreed upon by the parties by contract.
3. (c)The compensation obligation set forth herein shall not apply to calls to emergency numbers, calls by hearing disabled persons to a telecommunications relay service or local calls for which the caller has made the required coin deposit.
4. (d)In the absence of an agreement as required by paragraph (b) of this section, the carrier is obligated to compensate the payphone service provider at a per-call rate of $.494.