User manual GRANDSTREAM GXW EXTENDING ANALOG LINES

[. . . ] PEER ­ PEER GATEWAY SCENARIO (Extending Analog Lines Using the GXW Series w/o SIP Server) Boston, MA Branch 4 employees PSTN Cloud FX0 Lines Traditional PBX Internet Cloud FX0 Lines GXW 410x GXW 400x Analog Phones Headquarters ­ Denver CO Multiple employees EXTENDING ANALOG LINES OVER IP USING GXW410X FXO GATEWAY & GXW400X FXS GATEWAY This is a popular scenario which does not involve any SIP Server or IP PBX. [. . . ] For example: Bob is in the Boston office (GXW400x) on FXS port 1 and he needs to make an outbound call to Alice in the Denver office on extension 566-9300 through FXO port 1. Bob needs to dial 99-1-566-9300, which forces the call to go through FXO line 1 only. (99 represents the prefix; 1 represents port number 1) Since the FXS gateway has a Dial Plan feature, you can configure all calls to have a prefix (such as 99) appended automatically so Bob could just dial 1-566-9300 and the FXS gateway would append 99 to it before dialing. PORT TO PORT MAPPING BETWEEN FXS PORT AND FXO PORT Port to port mapping enables calls placed on a specific FXS port n to be completed through the PSTN network that is connected to a specific FXO port n. This is similar to a one to one mapping configuration except it is hard coded to always be routed through a specific FXO port. End-user is not required to dial any extra numbers (see above example). Port to port mapping is configured using the Dial Plan feature on the FXS GXW. [. . . ] The call is seamlessly mapped through FXO port 5 (which was pre-configured using the dial plan - 995). If you need further information or have any questions related to this setup, please email us at support@grandstream. com. Grandstream Networks Peer ­ Peer Gateways (w/o SIP Server) Page 3 of 3 [. . . ]