This document is an administration guide for the Linksys PAP2 and RT31P2 phone adapters. It covers their features, characteristics and how to use them.
The guide provides an overview of the Linksys Phone Adapter, a low‑density VoIP gateway that converts analog telephone signals to IP telephony. It includes hardware details such as up to two RJ‑11 ports for standard phones and an RJ‑45 Ethernet interface for network connection.
It also describes the software configuration mechanisms, SIP‑based signaling, supported codecs, NAT traversal, and a full set of feature descriptions, troubleshooting steps, and reference tables for administrators.
| Telephone ports | up to two RJ‑11 ports |
|---|---|
| Network interface | RJ‑45 Ethernet connection |
| Supported codecs | G.711, G.726, G.729A, G.723.1 |
The adapter provides up to two RJ‑11 ports for standard analog phones.
It supports G.711 (A‑law and µ‑law), G.726, G.729A, and G.723.1.
The device uses the Session Initiation Protocol (SIP) as its signaling protocol.