ZyXEL ISG50-PSTN User Guide - Page 449
The FXS Screen
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Chapter 28 Voice Interfaces performance, monitoring, power transfer, and multiplexing of the channels. You must connect a TE device to a NT device to access an ISDN network. The ISG50 is a TE device. Types of ISDN Switches There are many different ISDN switch types from different vendors in the world. The BRI interface enables the ISG50 to communicate with the following BRI switches. • 5ESS - AT&T basic rate switches • MDS100 • NI1 - National ISDN-1 switches • ENT3 - Euro-ISDN switches (UK and others) • AUS - Australian TS013 switches 28.2 The FXS Screen Use this screen to configure settings for the analog phones connected to the ISG50. To access this screen, click Configuration > PBX > Voice Interfaces > FXS. Figure 287 Configuration > PBX > Voice Interfaces > FXS Each field is described in the following table. Table 149 Configuration > PBX > Voice Interfaces > FXS LABEL DESCRIPTION Tx Volume Level Select the volume level transmitted from the ISG50. -6 is the quietest, and 6 is the loudest. Rx Volume Level Select the volume level transmitted to the ISG50. -6 is the quietest, and 6 is the loudest. Dial Interval Sec Enter the number of seconds the ISG50 should wait after you stop dialing numbers (from FXS extensions) before it makes the phone call. Country Code The signals used by telephone companies to indicate a busy line or an available line differ by country. You must select the country code for the location of the ISG50. The ISG50 can then detect whether the FXS line is in use or available. Select default to reset the country code value to the factory defaults. Fax Protocol Select Pass-Through to use UDP packets with G.711 format or T.38 format to send fax messages. T.38 provides better quality, but it may have inter-operability problems. The peer devices must also use T.38. ISG50 User's Guide 449
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