ZyXEL Communications max208m User Manual

 Chapter 10 The VoIP Account Screens

WiMAX Device Configuration User’s Guide

The following table describes the labels in this screen.

Click VoIP > Account 1 (or Account 2) > FAX to configure which standard the account uses for 
fax services.

FAX

The following table describes the labels in this screen.

The following section contains additional technical information about the WiMAX Device features 
described in this chapter.

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 

Dialing

Inter-digit 

Timeout

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.

First-digit 

Timeout

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.

FAX

Options

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.