Section I DESCRIPTION AND USE OF
OPERATOR'S CONTROLS AND INDICATORS
2-1. DESCRIPTION AND USE OF OPERATOR'S
CONTROLS AND INDICATORS.
CONNECTOR ADAPTER. A combination jack and plug
that fits into the jacks of other adapters, allowing for line-
to-line or conference calls. The plugs, which are thumb-
screws, secure telephone lines at the line terminal points
through clamping force. A glow lamp seated inside the
adapter's clear-plastic body will light when an incoming call
is received. A designation strip painted on the body of the
adapter allows the operator to designate terminal lines in
writing.
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