Zhone IMACS-200 ユーザーズマニュアル

-15

Out of Service, an indication that a system element has failed.

Open Systems Interconnection

Pulse Amplitude Modulation

Private Branch Exchange, a small phone switch inside a company.

Pulse Code Modulation

Protocol Data Unit

A program used to test IP-level connectivity from one IP address to another.

Private Line Automatic Ringdown

Pulse Link Repeater

Point of Presence, usually a telephone carrier office.

Plain Old Telephone Service

PPhone Foreign Exchange Office port. An interface at the end of the FX line connected to 
DMS SuperNode Switch.