This standard specifies the general requirements for pulse key telephones. This standard applies to ordinary pulse key telephones (hereinafter referred to as telephones) GB/T 9032-1988 Technical requirements for pulse key telephones GB/T9032-1988 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Technical requirements for pushbutton telephones with pulse
Performance requirements of
pushbutton telephone with pulse This standard specifies general requirements for pushbutton telephones with pulse. This standard applies to ordinary pushbutton telephones with pulse (hereinafter referred to as telephones). Environmental conditions for use:
Temperature: -10~40℃
Relative humidity: 45%~95%
Air pressure: 86~106kPa
Noise: not more than 60dB(A)
1 Transmission characteristics
GB 9032--88
1.1 The telephone is connected to the analog telephone network test system, and its sending, receiving and sidetone reference equivalents shall meet the requirements of Table 1. Table 1www.bzxz.net
Phone type
Simulated user line length
Objective transmission reference equivalent
Objective reception reference equivalent
Objective side tone reference equivalent
Phone that meets both A and B requirements is C type. The phone should have a type mark. 3km
≤+15
≥+10
1.2 The transmission frequency response and reception frequency response of the phone should meet the requirements of GB6362 "Frequency Response of Telephones". 1.3 Transmission amplitude characteristics of the phone:
1.3.1 When the excitation sound pressure increases from 10dB to 0dB, the difference in readings on the equivalent meter is [ZFI≥9dB. 1.3.2 When the excitation sound pressure increases from 0dB to +10dB, the difference in readings on the equivalent meter is IZF,/≥7dB. 1.4 Nonlinear distortion or modulation noise voltage of telephone: B
≥+10
1.4.1 The nonlinear distortion of telephones using linear transmitters should not exceed 7%; the nonlinear distortion of receiving should not exceed 7%. dB
1.4.2 The modulation noise voltage of telephones using carbon particle transmitters should not exceed 20mV; the nonlinear distortion of receiving should not exceed 7%. 1.5 The maximum sound level of the telephone when it is powered on and off should not exceed 110dB(A). 1.6 There should be no humming when the telephone is in normal use.
1.7 For telephones used in digital exchanges, the impedance of the telephone in the call state should be within the frequency range of 300 to 3400Hz, and the stable return loss and echo return loss relative to the balanced test network should meet the requirements of Table 21. The balanced test network is shown in Figure 1. Note: 1) It is recommended that the real part of the telephone impedance can be selected in the range of 400 to 700Q, and the imaginary part can be selected in the range of 0 to -300Q. Approved by the Ministry of Electronics Industry of the People's Republic of China on March 2, 198842
Implemented on October 1, 1988
Stable balanced return loss
Transverse sound balanced loss
2 Ringing characteristics
GB 9032-88
Short term (until December 31, 1990)
2.1 The power sensitivity of the ringing should not be greater than 80mVA. 2.2 The ringing level should not be less than 70dB (A). 2.3 For phones with ringing adjustment, the ringing level at the low ringing position should not be less than 55dB (A). 2.4 The impedance in the ringing state should not be less than 3k2.3 DC characteristics
Long term (from January 1, 1991)
3.1 The DC resistance of the phone in the unplugged state should not be greater than 300. When the "R" key is set, the DC resistance of the telephone is allowed to increase by 5023.2 The leakage current of the telephone in the on-hook state should not be greater than 5A. 3.3 When the telephone is sending a number, the on resistance should not be greater than 300Q, and the off resistance should not be less than 100k4 Number plate
4.1 The keyboard of the number plate should meet the requirements of 1 in GB9033 "Technical requirements for pulse-type key dials for telephones"; when the key stroke is less than 1mm, there should be a key indication.
4.2 The number of pulses, rate, intermittent ratio and the time interval between two adjacent pulses of the number plate should meet the requirements of 2.1 and 2.2 in GB9033.
4.3 After each key of the number plate is used 5×105 times, it should meet the requirements of 4.2. 5 "R" key
5.1 For telephones with \R\ keys, the "R" key is set at an appropriate position outside the number plate key arrangement. And it should meet the requirements of 1.6 and 1.7 of GB9033.
5.2 When the “R\” key is in effect, the circuit interruption time should be 90±40ms, and the disconnection resistance should be not less than 100kα6 Safety
6.1 Under normal atmospheric conditions, the telephone should withstand a sinusoidal AC voltage with a frequency of 50Hz and an effective value of 500V for 1min without any flying and breakdown phenomena.
6.2 Under normal atmospheric conditions, the insulation resistance of the telephone should be not less than 50M2..
7 Basic environmental adaptability
GB 9032-88
7.1 When the telephone is at -10℃ low temperature and 40℃ high temperature, its objective sending and receiving reference equivalent is allowed to deviate from the index by 3d13, and shall comply with the requirements of 2.2, 4.2 and Chapter 9.
7.2 After the telephone is stored at -40℃ and 55℃ and restored under normal atmospheric conditions, it shall comply with the requirements of 1.1, 2.2, 4.2 and Chapter 9.
7.3 After the telephone is subjected to sweep vibration in the frequency range of 10～55Hz and the displacement amplitude of 0.35mm, there shall be no 7.4 After the phone is hit by a peak acceleration of 100m/s and a pulse duration of 16ms, there should be no mechanical damage or structural looseness, and it should meet the objective transmission and reception reference equivalents in Article 1.1 and the requirements of Articles 2.2, 4.2 and Chapter 9. 7.5 When the phone is at a temperature of 40℃ and a relative humidity of 90%~95%, its objective transmission and reception reference equivalents are allowed to deviate by 3dB. .Insulation resistance should be no less than 5M2 and should meet the requirements of 2.2, 4.2 and Chapter 9. 7.6 The telephone should be able to make calls and receive calls normally after a free fall from a height of 1000mm onto a concrete or steel surface. The casing and handle should be free of cracks and should meet the requirements of 1.2.
8 Fork spring
8.1 The ratio of the handle weight (including the handset) to the fork spring starting pressure should be greater than 1.5:1. 8.2 After 200,000 operations, the telephone fork spring should meet the objective sending and receiving reference equivalents in 1.1 and 2 .2. Requirements of Article 4.2 Surface quality
The surface of the phone housing and handle shall be free of damage and scars, and the metal parts and components shall be free of scratches, cracks and rust. 10 Phone cord
The life of the phone cord is specified in the product technical conditions. 11 Reliability
The mean time between failures (MTBF) of the phone shall not be less than 3000h. Additional remarks:
This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Shanghai Telecommunications Equipment Factory and the Telecommunications Transmission Institute of the Ministry of Posts and Telecommunications.
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