Personal SIP Account Workshop IAP 2008 VoIP Series Dennis Baron January 22, 2008

Dennis Baron, January 22, 2008Page 1np161

Personal SIP Account Workshop

IAP 2008 VoIP Series

Dennis Baron

January 22, 2008


Outline

• What is SIP

• Personal SIP Accounts

• Downloading and installing client software

• Questions and answers


What’s SIP

• IETF Standard defined by RFC 3261

• “The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying and terminating sessions with one or more participants.”

• Can be used for voice, video, instant messaging, gaming, etc., etc., etc.

• Uses URIs for addressing – single communications identity

– mailto:[email protected] for email

– xmpp:[email protected] for instant messaging

– sip:[email protected] for voice and video

• Username replaced by numbers for telephone applications


SIP Components

• User Agents

– Clients – Make requests

– Servers – Accept requests

• Server types

– Redirect Server

– Proxy Server

– Registrar Server

– Location Server

• Gateways


SIP Trapezoid

DNS Server

Location Server

Terminating User Agent

Outbound Proxy

Originating User Agent

DNS

SIP

SIP

SIP SIP

RTP

Registrar

Inbound Proxy

SIP


What are Personal SIP Accounts

• Uses your MIT SIP communications identity

• One account per person

• Allows you to use your own hardware or software for placing and receiving Internet calls

• Assigns a traditional telephone number for receiving calls

• Web interface for customizing your account

• “Experimental” service aimed at early technology adopters

• Not intended as a replacement for other telephone services

• IS&T support limited to activating accounts and web page

– No support at this time for clients


Personal SIP Support Model

• Self service account activation

– https://voip.mit.edu/cgi-bin/personal/sipmgr/

• IS&T Documentation

– http://mit.edu/ist/topics/telecommunications/psip/

• SIP Users at MIT Wiki

– https://wikis.mit.edu/confluence/display/SIP/SIP+Users+at+MIT

– Your contributions to the wiki are supported and encouraged!

• SIP Users Forum

– https://scripts-cert.mit.edu/~sip/sip-users/

– Not currently active – may replace with newer technology


Web Management Page


Web Management Page (cont.)

• Call routing control



• Call blocking control



• SIP Registrations


• “Hard phones”

• “Soft phones”

Soft and Hard SIP Clients


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SIP Device Configuration for MIT

• There is no standard terminology

Display name: Dennis Baron

User name: dbaron

Authorization user name: dbaron

Authorization password: *****

Domain: mit.edu

Outbound proxy: outgoing-sip-proxy.mit.edu

• Authorization user name is often assumed to be the same

• Don’t use your Kerberos password – same one as on web page

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Downloading CounterPath X-Lite

• Goto - http://www.counterpath.com/x-lite-downloadsurvey.html

• Choose your version

– 3.0 for Windows - 2000, XP

http://storage.counterpath.com/downloads/X-Lite_Win32_1011s_41150.exe?platform=win32&product=xlite

– 3.0 for Mac - OS X 10.4 (Doesn’t currently work on Leopard)

http://storage.counterpath.com/downloads/X-Lite_Mac_1011b_39984.dmg?platform=mac&product=xlite

– 2.0 for Linux

http://storage.counterpath.com/downloads/X-Lite_Install.tar.gz?platform=linux&product=xlite

• Support Forum - http://support.counterpath.com/


Configuring CounterPath X-Lite

← Your full name for the “From:” field

← Your Kerberos username

← Your SIP password

← mit.edu

← outgoing-sip-proxy.mit.edu


IAP 2008 - VoIP Series

• SIP Fundimentals Dennis Baron Tue Jan 15, 01-02:30pm, 4-149

• Personal SIP Account Workshop Dennis Baron Tue Jan 22, 01-02:30pm, 4-231

• Build, Test, and Deploy VoIP Applications with Asterisk and other Open-Source Applications

Elliot Eichen Tue Jan 29, 01-02:30pm, 4-231


Questions?


Personal SIP Support Model

• IS&T Documentation

– http://mit.edu/ist/topics/telecommunications/psip/

• SIP Users at MIT Wiki

– https://wikis.mit.edu/confluence/display/SIP/SIP+Users+at+MIT

– Your contributions to the wiki are supported and encouraged!

• SIP Users Forum

– https://scripts-cert.mit.edu/~sip/sip-users/

– Not currently active – may replace with newer technology

• Feedback from users and developers will inform future IS&T services



PBX PSTN

SIP/PRIGateway

DNS SRV Lookup

SIP Server

Internet2Internet

DNS Server

DNS SRV

LDAP Server

Campus Network


PBX PSTN

SIP/PRIGateway

SIP INVITE

SIP Server

Internet2Internet

DNS Server

SIP

LDAP Server

Campus Network


PBX PSTN

SIP/PRIGateway

LDAP Lookup

SIP Server

Internet2Internet

DNS Server

LDAP

LDAP Server

Campus Network


PBX PSTN

SIP/PRIGateway

Call Sent to SIP Device

SIP Server

Internet2Internet

DNS Server

SIP

LDAP Server

Campus Network


PBX PSTN

SIP/PRIGateway

Media Stream to SIP Device

SIP Server

Internet2Internet

DNS Server

SIP

LDAP Server

Campus Network


PBX PSTN

SIP/PRIGateway

Call Sent to PBX Gateway

SIP Server

Internet2Internet

DNS Server

SIP

LDAP Server

Campus Network


PBX PSTN

SIP/PRIGateway

Media Stream via Gateway to PBX

SIP Server

Internet2Internet

DNS Server

RTP

LDAP Server

Campus Network


MITnet SIP Architecture

InternetDMZ Proxy

DMZ Proxy

Screening

Incoming AuthN

Outgoing Signing

Internal Proxy

Internal Proxy

Routing/Dial Plan

AuthZ

Accounting

Personal Proxy

Personal Proxy

Personal Proxy

…Registration

AuthN

Personal Options

Gateways

…

Services

Services Vmail to Email

Conferencing

etc.

Gateways

Personalization

Services


Current SIP Implementation

• Comprised of several different components

– SIP Outgoing Proxy

– SIP Internal Proxy

– SIP DMZ Proxy

– Media Proxy

– Radius server (accounting, authentication and

authorization)

– Asterisk server (voicemail, conferencing, PBX features)

– Cisco media gateway


Questions?

Documents

Personal SIP Account Workshop IAP 2008 VoIP Series Dennis Baron January 22, 2008