Example For 2S2O Gateway - D-Link DVG-5004 Operation Manual

SIP Operation Manual V2.6
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Example for 2S2O gateway:

P1-P2 is FXS interfaces and can be directly connected to a telephone set for direct calls. P3-P4 is FXO
interfaces and can be connected to a PSTN to serve as a bridge between the PSTN and other VoIP
telephones. The system also allows a call to be made from a traditional telephone line to connect with
a Gateway user.
Integrating the 2S2O with PBX
P1-P2 is FXS interfaces and can be connected to a PBX CO; P3-P4 is FXO interfaces and can be
connected to a PSTN to act as a bridge between the PSTN and other VoIP telephones. The system also
allows a call to be made from a traditional telephone line to connect with a Gateway user.