Duet2 D2600 / Duet3 D2650 Installation Manual – EU-D2600-D2650-INST/A10/v1 - 19
21.1 Calling
1. Two IP addresses for GPRS alarm calls
2. Two IP addresses for LAN alarm calls
3. Two GSM Numbers for alarm reporting
4. One GSM Number, or IP address, for Secure Callback
5. Two SMS phone numbers
6. Two IP addresses for polling over GPRS
7. Two IP addresses for polling over LAN
21.2 Automatic Test Calls
Periodic test calls can be sent at intervals of 1 to 99 seconds, minutes, hours or days. These timings
may be selected as Dynamic (i.e. since the last call), or Static (i.e. at fixed intervals). Test calls may
be sent on any/all signalling paths, i.e. LAN, GPRS, GSM, and SMS text.
Note: If programmed for interval of 0, no calls will be made.
21.3 Polling Calls
Polling calls can be sent at fixed intervals of 1 to 99 seconds, minutes, hours or days. Polling calls may
be sent via LAN or GPRS paths only.
Note: If programmed for interval of 0, no calls will be made.
21.4 PSTN Line Monitoring
- 24 Hour DC voltage
- Regular dial tone detect
- Off hook detect
21.5 SMS (Short Message Service)
In addition to sending alarm signals to an Alarm Receiving Centre via the wired or radio paths, the
Duet can send text messages to one or two GSM mobile telephones.
These text messages may be used to report an alarm event to other people, e.g. the premises’ key
holder or owner, an alarms installation engineer etc…
Note: SMS messages are not delivered immediately. Most messages take only a few seconds to
arrive but you should expect up to 20 minutes delay (or longer) during busy periods.
The text message(s) are programmed into the NVM and can identify the site, the alarm event and
monitoring information, e.g. low battery voltage.
Some service providers offer a facility where an SMS message may be sent to a pager as well as
GSM portable telephones. They may also offer ‘broadcast SMS’ where one message may be sent
onto many portable telephones. Contact your GSM service provider to determine if this facility is
available in your area.
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