The SIP Tunneling service is used to build a tunnel between Quadros and to use that tunnel for routing the SIP calls through the remote Quadros. When this service is enabled, slave Quadros should be registered on the master Quadro with the corresponding username/password. With the appropriate configuration done on the master Quadro, the master device can use the slave Quadros for routing the SIP calls through them and accessing peers located behind the slave Quadro or recognized by it. This enables the master Quadro to locate the slave, even when the network settings, like IP address, SIP port and other settings are changed on the slave Quadro.
When the SIP Tunneling service is enabled, virtual tunnels between the master and its slaves are created. A possibility to use the created SIP tunnels will be automatically enabled in the Call Routing table.
Optionally, a SIP tunnel can be mutually established on two Quadros allowing to route SIP calls back and forth. A Quadro can be at the same time configured both as a slave and as a master to the same remote device, i.e. the slave Quadro can act as a master for the master device it is registered on. For example, the Quadro1 can act as a slave for the Quadro2. In its turn, the Quadro2 can act as a slave for the Quadro1. With this configuration and the corresponding routing rules added in the Call Routing table on both devices, the SIP calls will be routed from Quadro1 to Quadro2 and vice versa.
The SIP Tunnel Settings page is used to enable the Quadro as a slave or master device for SIP tunneling. The page consists of the following components: