VoIP gateway

The gateway is intended for the organization of an open telephone network, or a protected telephone network with a high degree of access restriction.
The gateway provides automatic connection between the local telephone subscribers of the gateway or other VoIP subscribers connected via an IP data network directly to the gateway or through another VoIP gateway. Separate analog TAs to the FXS lines of the gateway are connected via standard RJ-11 connectors (12). In addition, all eight telephone lines are connected to the “CROS” connector, to which the subscriber crossover field station KR-351, the VShch-2 type input panel, or another cross device can be connected.
The gateway connects to the data network through Ethernet 10 / 100Base-TX ports. The gateway works as the final IPv4 IP equipment. To access other IP networks, you need to use an external router, the IP address of which must be set in the gateway in the “access router” parameter.
The gateway is controlled by a terminal program from a remote PC connected to the gateway via the Ethernet interface via the Telnet protocol or using a WEB browser via the HTTP protocol.

Gateway provides:

– coding of analog telephone signals into digital packets using G.729 / V, G.723.1, G.711U / A, G.726 audio codecs.
– routing phone calls between connected phones and the corresponding SIP server via SIP.
– masking voice traffic using the SRTP protocol.
– masking overhead information using the TLS mechanism.

The gateway is based on the Grandstream GXW4008 board.
The gateway is configured from a PC.
For the gateway to work, the presence of the operator is not necessary.