Operator Services Operator Services consist of the following services. (a) Calling card - the Customer dials 0+ or 0 - and provides operator with calling card number for billing purposes. (b) Collect - the Customer dials 0+ or 0 - and asks the operator to bill the call to the called number, provided such billing is accepted by the called number. (c) Third number billed - the Customer dials 0+ or 0- and asks the operator to bill the call to a different number than the calling or called number. (d) Operator assistance - providing local and intraLATA operator assistance for the purposes of: (1) assisting Customers requesting help in completing calls or requesting information on how to place calls; (2) handling emergency calls; (3) handling person-to-person calls. (e) Operator Transfer Service (“OTS”) - calls in which the Customer dials “0”, is connected to an SBC ILLINOIS operator and then requests call routing to an IXC subscribing to OTS. The operator will key the IXC’s digit carrier identification code to route the Customer to the requested IXC’s point of termination. (f) BLV - Service in which operator verifies a busy condition on a line. (g) BLVI - service in which operator, after verifying a busy line, interrupts the call in progress.