GA 1210-2014Security technical requirements for building intercom systems (English PDF)

3.1 Terms and definitions

The following terms and definitions apply to this document.

3.1.1

Building intercom system; BIS

It refers to the electronic system which is used in the residential and

commercial buildings, has such functions as selective call, intercom, visual

(if any) and so on, AND is able to control the unlocking.

3.1.2

Visitor call unit; VCU

It refers to the device which is installed at the entrance of the controlled

building, can choose to call the user receiver and management unit, AND is

able to realize intercom, camera (if any) and unlocking control.

3.1.3

User receiver unit; URU

It refers to the device which can be selectively called by the visitor call unit

or the management unit, achieve intercom and visual (if any), AND is able to

control the unlocking of the visitor call unit.

3.1.4

Management unit; MU

It refers to the device that is used by an administrator to realize two-way

selective call and intercom with the visitor call unit and user receiver unit

AND it is able to control the unlocking of the visitor call unit.

3.1.5

Special auxiliary device

It refers to a dedicated device for assisting in the realization of basic

functions in a system, such as the device for implementing system

communication, remote control, and interface integration with a third-party

device.

It refers to the gain of the sound pressure of the ear reference point at the

receiving end as relative to the excitation sound pressure of the mouth

reference point at the sending end, in dB, which is a function of frequency.

3.1.13

Acoustic delay

It refers to the one-way delay time required by the voice signal input into the

mouth reference point at the sending end through each component of the

system to the output from the ear reference point at the receiving end.

3.1.14

Idle channel noise

It refers to the noise as measured from the receiving end of the interphone

when there is no test signal transmission after the channel is established, in

dB (A).

3.1.15

Loudness rating guard-ring position; LRGP

It refers to, when measuring the loudness rating of the system, the relative

position of the management unit or user receiver handle to the artificial

mouth.

3.2 Abbreviations

The following abbreviations apply to this document.

EUT. Equipment under test

5.1.5 Night operation

Visitor call unit shall be able to provide night key backlight and camera auto

lighting function to facilitate the night operation of user.

5.1.6 Operation instructions

The system shall have the operation information prompt function. The visitor

call unit shall have a clear call operation indication or identification, AND shall

provide audible and/or visual prompts during operation and unlocking.

5.2 System function requirements of management unit configuration

The system configuring the management unit shall, in addition to the

requirements of 5.1, also comply with the following requirements.

a) The management unit shall be able to selectively call the user receiver

unit, the visitor call unit and the user receiver unit shall be able to call the

management unit, all calls shall have the corresponding call and answer

prompt signal, AND the prompt signal can be auditory and/or visual;

b) The management unit shall have an intercom function with the visitor call

unit and the user receiver unit;

c) The management unit shall have an electronic control unlocking function,

AND the administrators shall be able to confirm and manually control the

unlocking after receiving the visitor calls.

5.3 Overhearing prevention

When a two-way call is established between each management unit, visitor call

unit, or user receiver unit in the system, the call voice shall not be overheard by

other user receiver units or management units in the system.

5.4 Door open overtime alarm

When the open time of the electronically controlled door exceeds the system

default value, it shall immediately issue an audible alarm prompt. For the

system configured with management unit, the alarm information shall be sent

to the management unit in real time.

b) User receiver unit using the handle calling AND the management unit side.

shall not be greater than 48 dB(A).

6.1.5 Ringing sound pressure

The ringing sound pressure shall be not less than 73 dB(A) AND not more than

6.2 Video characteristics

6.2.1 Image resolution

Image resolution shall meet the following requirements.

a) Black and white image resolution. shall not be less than 250 TVL;

b) Color image resolution. shal...

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