System and method for provision of a second line service to a telecommunications device

A method for completing a communication setup initiated from an originating station and directed to a terminating destination, the method comprising:

• receiving a communication at a switch, the communication being sent from the originating station through an MTSO to the switch, and the communication comprising only a dialed number and a calling number;
• recognizing by the switch that the dialed number is a valid network telephone number;
• recognizing by the switch that the dialed number is serviced by an SLS platform;
• transmitting from the switch, based at least in part on the dialed number, a query message to the SLS platform that is communicatively coupled to the switch;
• receiving at the switch an SLS number selected from a plurality of SLS numbers associated with the originating station and a destination number associated with the terminating destination that are both selected based on the dialed number and the calling number;
• and
• establishing a communication channel setup through the switch by connecting through the switch a voice channel circuit between the originating station and the destination number of the terminating destination and populating a CLID field to be included in a communication setup request sent to the terminating destination with the SLS number.

A method for routing a communication from an originating station, which is roaming on a second telecommunications network, to a terminating destination, wherein a first telecommunications network is the home network of the originating station, and the first telecommunications network and the second telecommunications network can be communicatively coupled and distinct networks, the method comprising:

• receiving a communication at a switch residing within the first telecommunications network, the communication being sent from the originating station, which is roaming on the second telecommunications network, the communication comprising a directory number;
• recognizing by the switch that the directory number includes a 10-digit telephone number;
• recognizing by the switch that the directory number is intended to invoke an SLS call;
• transmitting from the switch, based at least in part on the directory number, a query message to an SLS platform residing within the first telecommunications network;
• receiving at the switch a reply to the query message from the SLS platform, the reply to the query message comprising:
• routing information for the directory number included with the communication for routing the communication to a correct terminating destination;
• and
• information indicating a CLID field to include with the communication, the CLID field comprising an SLS number of the originating station;
• and
• communicating to the second telecommunications network through the switch routing information for the communication, based at least in part on the reply to the query message, by transmitting to the second telecommunications network the SLS number of the originating station for the CLID field of the correct terminating destination.