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ZyXEL
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I use a ZyXEL modem and my calls drop out at 5 minutes?
Click the Start button > Select Run
Type:
telnet 192.168.1.1
When asked for Password type 1234 press enter
Select
“System Maintenance”
by typing
24
then press enter
Select
“Command Interface”
by typing
8
then press enter
At the prompt,
type ip nat service sip active 0
At the prompt type:
exit
Select
“Exit”
by typing
99
then press enter
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