ZyXEL MAX218M2W User Guide - Page 167
FAX, 10.8 Technical Reference, 10.8.1 SIP Call Progression with Session Timer
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Chapter 10 The VoIP Account Screens The following table describes the labels in this screen. Table 74 Dialing LABEL Inter-digit Timeout First-digit Timeout DESCRIPTION Set the time in seconds (1~5) the WiMAX Device waits for each digit input of a complete callee number after you press the first key on the phone. If the WiMAX Device cannot receive the next digit entered within this time period, the WiMAX Device processes digits you have dialed. Set the number of seconds (5~30) for the WiMAX Device to wait for you to start dialing a number after you pick up the telephone receiver. If you do not dial any number within that time period, the dial tone becomes a busy signal. Put back the receiver and pick it up again if you want to make a new call. 10.7 FAX Click VoIP > Account 1 (or Account 2) > FAX to configure which standard the account uses for fax services. Figure 97 FAX The following table describes the labels in this screen. Table 75 FAX LABEL Options DESCRIPTION Select which standard the WiMAX Device uses to handle faxes. The peer devices must also use standard. G.711A Pass Through - Select this option to send and receive fax messages over the network or Internet using VoIP (G.711a). By encoding fax data as audio data, faxes may be susceptible to packet loss and other errors. However, as this standard is considerably older than T.38, it is more compatible with older obsolete systems. T.38 FAX Relay - WiMAX Device encodes fax messages to T.38 packets and sends as UDP packets through IP networks. This provides better quality, but it may have interoperability problems. 10.8 Technical Reference The following section contains additional technical information about the WiMAX Device features described in this chapter. 10.8.1 SIP Call Progression with Session Timer The following figure displays the basic steps in the setup and tear down of a SIP call with session timer supported by both peers. The UPDATE method is used to refresh the session. A calls B and WiMAX Device Configuration User's Guide 167