Digi APPLICATION NOTE 34 - Manual (Page 6)

6
2.2 Configure PPP 4 (PSTN)
It will be necessary to configure PPP 4 as an outbound interface as the default is for the interface to accept
incoming calls. Then ISP configuration will be added.
Navigate to the following location:
Configuration - Interfaces > PPP > PPP 0 - 4 > PPP 4 > Standard
Scroll to the bottom of the page and click “Load dialling defaults”.
The PPP 4 configuration needs to be configured to be “always on” and have a power up delay of 60 seconds
to allow the ADSL connection to come up and be the primary connection. The interface will also be
configured for use with an ISP, enter the details as shown in the tables below.
Parameter Setting Description
Dial-out number 0845 1400101 Replace with the number for your ISP
Use GPRS/PSTN/external modem PSTN Use internal PSTN modem
**Use W-WAN/external modem No Use internal ISDN modem
Username User Replace with your dial up username
Password Pass Replace with your dial up password
Always on mode ON Interface should always be active
Power up AODI delay (s) 60
Timer to allow main ADSL connection to
come up before this one is activated
Inactivity timeout (s) 0
Keep interface in service even if no data
passes through interface
Local IP address 0.0.0.0
Your ISP will normally assign an IP
address automatically
** Only applies if configuring ISDN, not PSTN