In a local line network, a geographical area provided with telephone service via a particular flexibility point known as a servingarea interface.; 在本地用戶線路網(wǎng)絡(luò)中,通過一個(gè)稱之為“服務(wù)區(qū)域接口”的特定靈活接點(diǎn)來提供電話服務(wù)的一個(gè)地理區(qū)域。