OPS: Questions and Answers.
Boris Ovchinnikov, a specialist in the technical support department of the company «Security and Safety» (Ukraine), answers the readers' questions of the TZ
«Quite a few affordable GSM phone jamming devices have appeared on the market. How can you protect yourself from intruders armed with such devices when using Lun object devices?
Alexander Prilipko, Vladivostok.»
At the moment, the object device «Lun-7T», operating via GSM and GPRS channels, can be equipped with a TK-7 telephone communicator, which can transmit an alarm via a dial-up telephone line if the GSM or GPRS channel is jammed. Naturally, the centralized monitoring console must have a corresponding receiving station. The equipment «SurGard MLR2», ADT PAKT-2 and other similar types can be used as a receiving station.
«Our bank branch has a fairly impressive battery room. The head of the branch is very worried that a fire could break out in the battery room due to overheating of the batteries when the charger fails. The alarm system is based on the Lun-7T device. What can you advise?
Valery Demchenko, Kirovsk.»
To solve this problem, you can connect the relay output module MRV-8 to the Lun-7T device, and install a temperature sensor with a certain threshold value on one of the alarm zones connected to the battery. When a certain temperature threshold is exceeded, the sensor will be triggered, and the relay corresponding to this zone can turn off the charger either until the service personnel arrives or until the battery temperature is restored. The relay output module can be programmed to behave in a given situation using the Configurator program. The module has 8 relay outputs. Each relay can switch a current of up to 3A with a voltage of 30 volts DC or 60 volts AC.
«We have several objects where the GSM base station signal level is very low and there are strong distortions when talking on the phone from the area where the objects are located. How can we get out of this situation?
Sergey Khvorostov, Rybinsk.»
It is recommended to install the Orlan-GPRS expansion kit on the control panel, and program the site devices to operate on two channels: voice and GPRS. Operation on the GPRS channel differs from the voice channel in its high noise immunity. Operation on the voice channel and GPRS channel is supported by the Lun-7T devices, starting with version 100. It is worth noting that when working in GPRS, it becomes possible to remotely configure some parameters of the site device and the message delivery speed is very high, about one second.
«Our organization is creating a centralized fire alarm monitoring console. There is a requirement from the Ministry of Emergency Situations that signals coming to a commercial console must be duplicated to the console of the district or regional Ministry of Emergency Situations. What technical solutions do you have for such a task?
Igor Voskoboinik, Cherkassy.»
There is such a technical solution, it is a set of expansion of the centralized monitoring console «Phoenix-mini». The «Phoenix-mini» set is installed in the central offices of security and monitoring services of companies that have a wide branch network of offices and departments that are under the supervision of the centralized monitoring console «Orlan» of a third-party organization. The set includes one module «Orlan-SMS» or «Orlan-GPRS» and software. On this mini-console, duplication of messages from the object devices is carried out for specific selected objects. For one object, sending can be carried out to three mini-console units at once. Depending on the selected «Orlan» module, the sending of messages will be carried out via GPRS channels or SMS messages. Naturally, the GPRS channel is preferable, since messages arrive at the mini-console almost simultaneously with the main console. In addition, at the operator's request, it is possible to read the readings of electricity meters from the mini-console that work with the «Lun — 7TE» devices.