Trunk-side meaning

In telco terminology, referring to the internal telco network, or telco-facing portion of the Public Switched Telephone Network (PSTN).This is in contrast to the line side of the network, which is the local loop, or customer-facing portion of the PSTN.The demarcation point is at the local loop interface to the central office (CO). See also CO, line side, local loop, and PSTN.
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