ZyXEL Communications 2R-P1C User Manual

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P-2301/2R-P1C / P-2301RL-P1C User’s Guide
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4.5 PSTN Phone Line Configuration (P-
2301RL-P1 only)
When one of your VoIP accounts is registered, the ZyXEL 
Device normally uses the Internet (VoIP) rather than the 
regular PSTN phone line to make phone calls. Use this 
section to set certain phone numbers (emergency services, 
for example) to always use the regular (PSTN) line. You can 
also set the PSTN line prefix number you enter on your 
telephone keypad before dialing a phone number. This prefix 
number makes the ZyXEL Device use the PSTN line for the 
call.