Category Archives: Voip

SIP Express Router (SER)

Posted on January 15, 2008

SIP Express Router: Free GPL-ed SIP server (registrar, proxy, redirect) http://iptel.org/ser/features De-facto standard SER: domains, subscribers Routing language extension modules http://iptel.org/download

Posted in Voip |

SIP Method

Posted on January 15, 2008

INVITE: initiates sessions ACK CANCEL BYE REGISTER OPTIONS SIP extension methods: SUBSCRIBE/NOTIFY/MESSAGE: instant messaging REFER: call transfer PRACK: provisional reliable responses INFO UPDATE

Posted in Voip |

SIP components

Posted on January 15, 2008

SIP Phones (User-Agents) SIP Servers (Registratar, Proxy, Redirect) SIP PSTN Gateways Application Servers (Media Servers)

Posted in Voip |