encrypted line securitysystemsthe encryption AES128 bit shallbe enabled at the
monitoring station receiver.
• For UL Commercial Burglary installations, the TL2803G(R) E/3G2080 (R)
E/TL280(R)E is listed as a primary (sole) communication means (heartbeat must
be enabled) or for supplementary (back-up) use in conjunction with a Plain Old
Telephone Service (POTS) line dialer. When the heartbeat transmission over the
Ethernet or cellular network is enabled, using the TL2803G(R)E/3G2080 (R)
E/TL280(R) E with a compatible control unit listed for standard/encrypted line
security, it can provide line securityforthe alarmsystemover the primaryline.
•The TL2803G(R)E/3G2080 (R)E/TL280(R)Eis also suitable to be used with a
compatible controlunit listed fordual line securitytransmission when used in con-
junction with a DACT or a Public Switched Data Network (PSDN) transmitter,
where the PSDN provides the line security and is the primary line. In this mode,
alarm signals are required to be sent simultaneously over both communication
methods.
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