Connecting a PSTN Landline
Connect the incoming PSTN landline to the modular jack labeled “PSTN” on the C3 unit. If a
PSTN landline is present, the GSM network is used to backup the PSTN telephone service. If
the landline service is unavailable, the GSM network will be used.
Backup GSM service without a security system
Backup GSM service with a security system
7
GREEN(+)
RED(-)
GREEN(+)
RED(-)
NETWORK
TELEPHONE
INTERFACE
SURGE ARRESTOR
CUSTOMER
ACCESS
SURGE ARRESTOR
MUST BE GROUNDED!
RJ11
JACK(S)
PHONE
HOUSE
TO SECURITY PANEL
PSTNPHONE
TELEPHONES
TO ALL HOUSE
JACK(S)
PHONE
HOUSE
RJ11
SURGE ARRESTOR
INTERFACE AT
TO TELCO
SURGE ARRESTOR
ACCESS
CUSTOMER
INTERFACE
TELEPHONE
NETWORK
MUST BE GROUNDED!
SURGE ARRESTOR
PSTNPHONE
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