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Anonymous users2024-02-071. ISDN is narrowband access, and the data is up to 128K s; ADSL is broadband access, and the data can reach an uplink rate of 640kbps to 1Mbps, and a downlink rate of 1Mbps to 8Mbps
2. ISDN is an integrated business digital network, which can be connected to an ISDN terminal, computer, fax machine or projector, etc., which can achieve many purposes, whether it is sound, image, data transmission. Just listen to the name and you'll know the idea.
ADSL is a wire connected to the computer and ** through a separator, and the others will not work.
In addition, the ISDN can be connected to two **, one **power supply, one local power supply, which can be connected or played at the same time.
3. ADSL adopts special line transmission, and ADSL uses frequency division technology to separate the low-frequency signal and high-frequency signal transmitted by the ordinary ** line. Below 3400Hz for ** use; The high-frequency part above 3400Hz is used for Internet access, that is, data and voice signals are transmitted on the same copper wire, and the data signal does not pass through the switch equipment.
The "ISDN" service provides users with two interfaces: basic rate (BRI) (2B+D, 144Kbps) and base group rate (PRI) (primary group rate) (30B+D). The basic rate interface includes two B channels (64KKBPS) and one D channel (16KKBPS) that can work independently, where B channel is generally used to transmit voice, data and images, and D channel is used to transmit signaling or packet information.
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Anonymous users2024-02-06ADSL is broadband, ISDN belongs to optical skewers, which is much more expensive and faster than ADSL.
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Anonymous users2024-02-05ISDN refers to Integrated Services Digital Network, which is an international standard for digital networks and a typical circuit-switched network system. In the ITU proposal, ISDN is a communication network developed on the basis of digital network IDN, and ISDN can support a variety of services, including ** business and non-** service. <
Demo model: iPhone 12 &&& Huawei P40 && Xiaomi 11 The system version refers to the integrated service digital network, which is an international standard for digital networks and a typical circuit switching network system. In the ITU proposal, ISDN is a communication network developed on the basis of digital network IDN, and ISDN can support a variety of services, including ** business and non-** service.
This method works for Xiaomi, Apple, Huawei.
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