【国外标准】 IEEE Standard Telephone Loop Performance Characteristics
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2025-10-27
- IEEE 820-2021
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适用范围:
This standard covers the general parameters and characteristics associated with telephone loops from the subscriber signaling and analog voice frequency interface to the local Class 5 switch interface. It includes only those business and residential lines in the North American public switched network where no special performance requirements are involved. This standard provides common denominators for subscriber line performance, independent of facility types, construction processes or… read more equipment, and circuit provisioning methods. read less
标准号:
IEEE 820-2021
标准名称:
IEEE Standard Telephone Loop Performance Characteristics
英文名称:
IEEE Standard Telephone Loop Performance Characteristics标准状态:
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发布日期:
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