3 setting ports priority, 4 disabling call waiting, 5 link authentication – ZyXEL Communications ISDN Terminal Adapter Omni.Net Lite User Manual
Page 64: Figure 20 at command example 2, Table 17 ppp at commands

Omni.Net Lite User’s Guide
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Chapter 3 Using AT Commands
Figure 20 AT Command Example 2
3.4.3 Setting Ports Priority
To set the same priority for both ports, enter AT\P2=0 and press [ENTER].
To set the PHONE 1 port to have the first priority, enter AT\P2=1 and press [ENTER].
To set the PHONE 2 port to have the first priority, enter AT\P2=2 and press [ENTER].
3.4.4 Disabling Call Waiting
A call waiting tone will interfere with data communication. It is highly recommended that you
disable the call waiting feature on the port to which a fax or modem is connected.
To disable call waiting on either port, enter AT!1A1=0 or AT!2A1=0 and press [ENTER].
3.4.5 Link Authentication
Refer to
Table 17 PPP AT commands
AT COMMANDS
DESCRIPTION
AT%M1=0
Disable PAP to CHAP conversion (default).
AT%M1=1
Enable PAP to CHAP conversion.