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PSTN Settings
PSTN Relay
PSTN Prefix
The PSTN Relay allows certain calls to be diverted to the
PSTN link, even though VoIP is working properly.
This PSTN prefix means that any number beginning with this
prefix will be diverted to PSTN (the prefix itself is deleted,
then the remainder of the number is dialed via PSTN).
• If the prefix is a single character, that character must be *
• If the prefix is multiple characters, all characters after the
1
st
character must be digits. The 1
st
char character can be *
or a digit.
Note: When dialing, do not wait for a 2
nd
dial tone for the
PSTN; there is no 2
nd
dial tone. Just dial the PSTN prefix and
the desired phone number.
PSTN Fixed Relay
This provides another method of diverting calls to the PSTN
link. Any Telephone numbers listed in this table will always be
dialed via PSTN.
This feature should be used to direct emergency numbers to the
PSTN.
PSTN Rollover
Use PSTN…
If enabled, then when VoIP is unavailable, all calls from the
handset will be sent via PSTN. (This is the same effect as
occurs when the power is off.) However, note that VoIP phone
numbers (beginning with are often unreachable via PSTN.
Normally, this setting should be Enabled.
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