@techreport{rosenberg-sipping-siptrunk-00,
    number =    {draft-rosenberg-sipping-siptrunk-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-rosenberg-sipping-siptrunk/00/},
    author =    {Jonathan Rosenberg},
    title =     {{What is a Session Initiation Protocol (SIP) Trunk Anyway?}},
    pagetotal = 10,
    year =      2008,
    month =     feb,
    day =       15,
    abstract =  {The term "Session Initiation Protocol (SIP) Trunk" has become almost commonplace amongst vendors and SIP providers. Even though the notion of a 'trunk' has a well defined meaning in circuit switched systems, it has never been defined for SIP. This document provides a formal definition for a SIP trunk, discusses its scope and applications, and establishes best practices for identification and security of SIP trunks.},
}