ZyXEL Communications 2R-P1C - Manual (Page 23)

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P-2301/2R-P1C / P-2301RL-P1C User’s Guide
4 Click Finish.
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.