ATS (Alarm Transmission System) Levels
The following table lists the ATS levels required for the panel when communicating over:
|
GSM ARC |
PSTN ARC |
Ethernet |
GPRS |
|
|---|---|---|---|---|
|
ATS Level |
ATS 2 |
ATS 2 |
ATS 6 |
ATS 5 |
Attenuation of PSTN
For a PSTN dialer, a CW1308 Internal Telecom or equivalent cable should be used to connect the modem to the phone line. The cable length should be between 0.5–100m.
Attenuation of Ethernet
For Ethernet, a Cat 5 cable should be used with its length between 0.5–100m.
Attenuation of GSM
The field strength of the GSM signal needs to at least -95dB. Below this level the modem will flag a low signal fault to the panel. This is handled in the same way as other faults on the system.
Monitoring and watchdog of PSTN (SPCN110) and GSM (SPCN320)
A failure of the interface between the PSTN modem and the panel will be detected after 30 seconds, after which an ATS fault will occur.
A failure of the interface between the GSM modem and the panel will be detected after 30 seconds, after which an ATS fault will occur.