What are the differences between the different interfaces of the headset? What devices is it suitable for use on?
There are Bluetooth and wired headsets. Generally, corded models have a variety of headphone interface options to meet the different equipment needs of different operators. Common direct connection models include crystal head, 2.5mm/3.5mm audio phone interface, 3.5mm single-head audio port, 3.5mm dual-head audio port and USB port. However, with the increasing popularity of type-C port mobile phones, UTC ports have also emerged. The traffic headset is convenient for almost all users to use the device. The following is a brief introduction to the devices that can be connected to these interfaces:
Crystal connector: It is also called the RJ9 interface. It is known that it is used on telephones without explanation. The connector looks similar to the network cable connector, but is smaller than the network cable connector. . The crystal head interface consists of four contacts, which can be arranged in different orders, that is, the line sequence in the jargon is different. Because there is currently no industry standard for wire sequence, the wire sequence of crystal-head earphones produced by different brands may be different, which may lead to mutual incompatibility issues between different brands of earphones and phones. Then netizens will ask, isn't the chance of incompatibility very high? Yes, so in order to solve this problem, the telephone service manufacturer invented the line sequence conversion box. As the name suggests, it changes the line sequence to achieve the unification of the headset and telephone line sequences. The operation is also very simple. You only need to connect the line sequence box between the phone and the headset to adjust the line sequence numbers of different levels on the line sequence box, and then use the test to adjust the line sequence number to the normal line number for the call, which means the pairing is successful. No adjustments are needed to make normal calls. Very good.
2.5mm/3.5mm audio phone interface: used on some telephones with audio ports, relatively few devices have it. At present, the common phone interfaces on the market are mainly crystal heads, so I won’t do it here. More introduction.
3.5mm single-head audio port: generally used on mobile phones, laptops, tablets and all-in-one computers with 3.5 single sockets. The interface has a four-pole wire sequence. There are two common wire sequence arrangements. One is The pin connection method for CTIA (international standard) is: left channel - right channel - ground wire - microphone; the other is OMTP (national standard, our country's standard) pin connection method is: left channel - right channel channel-microphone-ground.
Some netizens will ask, what is the difference between the two? If you connect a CTIA standard interface headset to an OMTP standard device socket, it will appear that the headset is compatible, but there will be distortion and crosstalk, and the microphone cannot be used, and vice versa.
3.5mm double-head audio port: Generally used on desktop computer hosts, the interface is a bilateral three-pole jack, which controls the microphone and speaker respectively.
USB interface: Generally used on USB Internet phones, laptops, desktop computers and all-in-one computers, and has a wide range of uses.
UTC interface: generally used on new smartphones, laptops and tablets. What should be noted here is that since the UTC socket on the original smartphone was the charging socket of the Android phone and did not have a call function, the headset with the UTC port of the telephone headset may not be able to use the call function after being connected and can only listen to music. This is normal. Smartphones released in the past two years have begun to be compatible with the headset call function, which means that you can use the UTC interface headset to make calls. The UTC interface needs to be tested and written to achieve compatibility, so when a new UTC interface mobile phone is launched, the old UTC interface traffic headset may also be incompatible. These are normal phenomena.
The above is an introduction to all direct connection interfaces for telephone headsets! Traffic headsets with UTC interface are still rarely sold in the market because compatibility issues require more technical support and are difficult to control. If you need to buy a UTC interface, you can try the UF92UTC headset from Bain. It fits perfectly on my Huawei mobile phone. The sound quality is very clear and the noise reduction effect is very good. I recommend it to you after buying it once.