SIP Telephony Device Requirements and Configuration

This document describes the requirements for SIP telephony devices,based on the deployment experience of large numbers of SIP phones andPC clients using different implementations in various networks. Theobjectives of the requirements are a well-defined set ofinteroperability and multi-vendor-supported core features, so as toenable similar ease of purchase, installation, and operation as foundfor PCs, PDAs, analog feature phones or mobile phones. We present aglossary of the most common settings and some of the more widely usedvalues for some settings. This memo provides information for theInternet community.