Table 1. Main characteristics of auxiliary technical equipment protection devices..
Table 1. Main characteristics of auxiliary technical equipment protection devices
|
Name (type) |
Purpose |
Protection methods |
Power Supply |
Note |
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|
Signal Limiting |
RF Intrusion Signal Filtering |
Disabling Converters |
Line Noise |
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| “Korund” | protection of analog two-wire TA |
yes |
no |
no |
no |
not required |
Suppression of low-frequency signals of small amplitude (Uc Ј 50 mV) at a frequency of 1 kHz towards the subscriber line (PBX) by at least 60 dB. Attenuation of speech signals is less than 2 dB. Dimensions 40x13x10 mm. It is installed inside Euro sockets and RTSh-4 type break-free sockets |
| “Granit-8” | protection of analog two-wire TA |
yes |
yes |
no |
no |
not required |
Designed for round-the-clock operation in automatic mode under continuous load in lines with resistance of 600 Ohm ± 10%. Insertion loss in the speech signal frequency band of 0.3 — 4 kHz at an input signal level of Uc Ј 100 mV towards the subscriber line (PBX) is not less than 60 dB. Insertion loss at a frequency of 100 kHz at an input signal level of Uc = 5 V towards the telephone set is not less than 10 dB. In the frequency range from 150 Hz to 10 kHz, the attenuation of speech signals (Uc = 5 V) does not exceed 3 dB |
| “Barrier-M1” | protection of analog two-wire TA |
no |
no |
yes |
no |
from subscriber line |
The isolation resistance between the telephone set and the PBX line is at least 20 MOhm. The voltage at the device output in standby reception is 5 — 7 V. The device switches from standby to operating mode when the current in the telephone line is at least 5 mA. The current consumption in standby mode is no more than 0.3 mA. |
| MP-1A (analog “Granit–11,12”) | protection of analog two-wire TA |
yes |
no |
no |
yes |
from subscriber line |
Overall dimensions 32x15x13 mm. Insertion loss towards subscriber line (PBX) in speech frequency band is not less than 68 dB for MP-1A. Current consumption is not less than 0.42 A. Noise signal voltage is not less than 32 mV in the range of 0.02 – 30 kHz. |
| MP-1C | protection of digital two-wire TA |
yes |
no |
no |
yes |
from subscriber line |
Overall dimensions 32x15x13 mm. Insertion loss towards subscriber line (PBX) in speech frequency band is not less than 43 dB for MP-1A. Current consumption is not less than 0.42 A. Noise signal voltage is not less than 32 mV in range 0.02 – 300 kHz |
| MP-7 “Gvard” | protection of digital two-wire TA |
no |
no |
yes |
no |
from subscriber line |
When the telephone handset is hung up, the device disconnects the microphone and telephone handset, the microphone and speaker of the loudspeaker system (HSS) from the line. |
| MP-8 “Sigma-RA” | protection of analog two-wire TA |
no |
no |
yes |
no |
main – from the subscriber line; backup – from a 12 V battery | Input electrical resistance module in call waiting mode is infinite. Current consumption from 12 V battery in the following mode: conversational — 0 mA; call waiting — 0 mA; call — no more than 5 mA; dialing — no more than 3 mA; with the line disconnected, the TA connected and the handset lifted — no more than 30 mA. Direct current consumed from the line in call waiting and hang-up mode is 0 mA. Alternating current consumed from the line by the calling device is no more than 3 mA. The level of the called signal at a distance of 0.5 m is not less than 83 dB |
| MP-2 | protection of three-program receiver of broadcasting network |
no |
no |
yes |
yes |
from broadcasting network |
Overall dimensions of the product 51x56x13 mm, weight no more than 70 g |
| MP-5 (analog of “Granit-9”) | protection of public address system loudspeakers or single-program receivers of the public address network |
no |
no |
yes |
yes |
from an external 12 V source and/or a Krona battery | The response time of the product upon receipt of an information signal is no more than 5.0 ms. The time of maintaining the connected state of the loudspeaker during pauses is from 1 to 9 s. Suppression of electrical signals in the frequency band of 0.02 — 10 kHz is not less than 90 dB. The continuous operation time of the device from one Krona battery when receiving an information signal is at least 100 hours. Overall dimensions are 120x55x23 mm, weight is 0.2 kg. |
| MP-4 (analog of “Granit-6”) | secondary clock protection |
no |
no |
yes |
yes |
from an external 12 V source and/or a Krona battery | Output noise signal voltage device in the speech frequency band without load is not less than 50 mV. Current consumption is not more than 70 μA. Overall dimensions are 84x60x20 mm, weight is not more than 0.3 kg |