GB/T 7620-1987

Active

300 bits per second duplex modem standardized for use in the general switched telephone network

在电话自动交换网上使用的标准化300比特/秒全双工调制解调器

Standard Type
GBT
ICS
33.040.60
CCS
M32
Status
Active
Issue Date
1987-04-03
Implementation
1987-11-01
Centralized Committee
工业和信息化部（通信）
Issuing Authority
工业和信息化部（通信）

Application Summary AI generated

This standard specifies the technical requirements for a 300 bits per second duplex modem designed for operation over the general switched telephone network (PSTN). It is applied in telecommunications equipment manufacturing and testing to ensure compatibility and reliable data transmission between modems connected through standard telephone lines. The standard facilitates interoperability in dial-up networking applications, such as early remote terminal access and low-speed data exchange.

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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.