A method, performed by a local network gateway, comprising: receiving (506, 508) external signaling data relating to an incoming voice communication session and to a called telephone number, TN, wherein the external signaling data is received by a local network gateway and from a communication system in an external network; sending, based on the called TN and via a first logical port and a second logical port within the local network gateway, internal signaling information relating to the incoming voice communication session, wherein the first logical port is associated with a first end point in a local network served by the local network gateway, and the second logical port is associated with a second end point in the local network; sending (513, 514, 522, 523), to the first end point, using a telecommunication protocol, and via a first physical interface, first end point signaling data indicating the incoming voice communication session; sending, to the second end point, using Session Initiation Protocol, SIP, and via a second physical interface, second end point signaling data indicating the incoming voice communication session, wherein the second physical interface is different from the first physical interface and the SIP is different from the telecommunication protocol; and after receiving, by the local network gateway, signaling data associated with an answering notification, establishing a first local communication session between the local network gateway and one of the first end point and the second end point. receiving (506, 508) external signaling data relating to an incoming voice communication session and to a called telephone number, TN, wherein the external signaling data is received by a local network gateway and from a communication system in an external network; sending, based on the called TN and via a first logical port and a second logical port within the local network gateway, internal signaling information relating to the incoming voice communication session, wherein the first logical port is associated with a first end point in a local network served by the local network gateway, and the second logical port is associated with a second end point in the local network; the first logical port is associated with a first end point in a local network served by the local network gateway, and the second logical port is associated with a second end point in the local network; sending (513, 514, 522, 523), to the first end point, using a telecommunication protocol, and via a first physical interface, first end point signaling data indicating the incoming voice communication session; sending, to the second end point, using Session Initiation Protocol, SIP, and via a second physical interface, second end point signaling data indicating the incoming voice communication session, wherein the second physical interface is different from the first physical interface and the SIP is different from the telecommunication protocol; and after receiving, by the local network gateway, signaling data associated with an answering notification, establishing a first local communication session between the local network gateway and one of the first end point and the second end point.