Internet Telephony - VoIP

VoIP

• VOIP Wiki - a reference guide to all things VOIP   voip-info.org wiki site - good starting point for all things VoIP related
• Like2Phone  VoIP proxy (and location server?) that works with e164.org
• Voxilla  Public access site with articles and forums focused on VoIP
• iptel.org  VoIP portal promoting VoIP technologies and is initiated by Germany's national research institute Fraunhofer Fokus.  Nice links pages to other VoIP resources.
• WikipediA Voice over IP  In addition to a decent overview, the tail end of this has many good links to providers and software.
• VoIP White Papers and Vendor Reports  Assortment of vendor supplied white papers on Voice over IP.
• FWD  FWD is the largest open network service provider for person-to-person, advanced, real-time IP communications.
• Siproxd  SIP Proxy to deal with NAT'd firewalls.
• SJ Labs  SJPhone is a SIP based softphone.
• Some notes on gettign SIP to work behind NAT  Interesting article on getting SIP to work behind NAT. (apocalyptech.com>
• ENUM - The bridge between the switched telephony network and the Internet   Overview and good cross reference to all things ENUM related (voip-info.org)
• ENUM - A Great Idea But...  Interesting article from the July 2005 issue of VON Magazine on ENUM (Electronic Numbering)
• Linux VoIP HOWTO   ibiblio.org
• Linking VoIP islands: The value of SIP trunking - SearchUnifiedCommunications.com - 20 October 2009

   

VoIP - Standards / Proposals

• RFC 1889  RTP: A Transport Protocol for Real-Time Applications
• RFC 1890  RTP Profile for Audio and Video Conferences with Minimal Control
• RFC 2326  Real Time Streaming Protocol (RTSP)
• RFC 2327  SDP: Session Description Protocol
• RFC 2833  RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
• RFC 2848  The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call Services
• RFC 2871  A Framework for Telephony Routing over IP
• RFC 2915  The Naming Authority Pointer (NAPRT) DNS Resource Record
• RFC 2916  E.164 numer and DNS
• RFC 2960  Stream Control Transmission Protocol
• RFC 2976  The SIP INFO Method
• RFC 3050  Common Gateway Interface for SIP
• RFC 3087  Control of Service Context using SIP Request-URI
• RFC 3219  Telephony Routing over IP (TRIP)
• RFC 3261  SIP: Session Initiation Protocol
• RFC 3262  Reliability of Previsional Responses in the Session Initiation Protocol (SIP)
• RFC 3263  Session Initiation Protocol (SIP): Locating SIP Servers
• RFC 3264  An Offer/Answer Model with the Session Description Protocol (SDP)
• RFC 3265  Session Initiation Protocol (SIP) - Specific Event Notification
• RFC 3311  The Session Initiation Protocol (SIP) UPDATE Method
• RFC 3312  Integration of Resource Management and Session Initiation Protocol (SIP)
• RFC 3313  Private session Initiation Protocol (SIP) Extensions for Media Authorization
• RFC 3323  A Privacy Mechanism for the Session Initiation Protocol (SIP)
• RFC 3325  Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks
• RFC 3326  The Reason Header Field for the Session Initiation Protocol (SIP)
• RFC 3327  Session Initiation Protocol (SIP) Extension Header Field for Registering Non-Adjacent Contacts
• RFC 3329  Security Mechanism Agreement for the Session Initiation Protocol (SIP)
• RFC 3361  Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for Session Initiation Protocol (SIP) Servers
• RFC 3372  Session Initiation Protocol for Telephones (SIP-T): Context and Architectures (BCP)
• RFC 3427  Change Process for the Session Initiation Protocol (SIP) (BCP)
• RFC 3428  Session Initiation Protocol (SIP) Extension for Instant Messaging
• RFC 3455  Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3rd-Generation Partnership Project (3GPP)
• RFC 3485  The Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Static Dictionary for Signaling Compression (SigComp)
• RFC 3486  Compressing the Session Initiation Protocol (SIP)
• RFC 3487  Requirements for Resource Priority Mechanisms for the Session Initiation Protocol (SIP)
• RFC 3515  The Session Initiation Protocol (SIP) Refer Method
• RFC 3525  Gateway Control Protocol Version 1
• RFC 3581  An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing
• RFC 3603  Private Session Initiation Protocol (SIP) Proxy-to-Proxy Extensions for Supporting the PacketCable Distributed Call Signaling Architecture
• RFC 3608  Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration
• RFC 3665  Session Initiation Protocol (SIP) Basic Call Flow Examples (BCP)
• RFC 3666  Session Initiation Protocol (SIP) Public Switched Telephone Network (PSTN) Call Flows (BCP)
• RFC 3680  A Session Initiation Protocol (SIP) Event Package for Registrations
• RFC 3702  Authentication, Authorization, and Accounting Requirements for the Session Initiation Protocol (SIP)
• RFC 3725  Best Current Practices for Third Party Call Control (3pcc) in the Session Initiation Protocol (SIP)
• RFC 3764  enumservice registration for Session Initiation Protocol (SIP) Addresses-of-Record
• RFC 3824  Using E.164 numbers with the Session Initiation Protocol (SIP)
• RFC 3840  Indicating User Agent Capabilities in the Session Initiation Protocol (SIP)
• RFC 3841  Caller Preferences for the Session Initiation Protocol (SIP)
• RFC 3842  A Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol (SIP)
• RFC 3853  S/MIME Advanced Encryption Standard (AES) Requirement for the Session Initiation Protocol (SIP)
• RFC 3856  A Presence Event Package for the Session Initiation Protocol (SIP)
• RFC 3857  A Watcher Information Event Template-Package for the Session Initiation Protocol (SIP)
• RFC 3891  The Session Initiation Protocol (SIP) "Replaces" Header
• RFC 3892  The Session Initiation Protocol (SIP) Referred-By Mechanism
• RFC 3893  Session Initiation Protocol (SIP) Authenticated Identity Body (AIB) Format
• RFC 3903  Session Initiation Protocol (SIP) Extension for Event State Publication
• RFC 3911  The Session Initiation Protocol (SIP) "Join" Header
• RFC 3959  The Early Session Disposition Type for the Session Initiation Protocol (SIP)
• RFC 3960  Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP)
• RFC 3966  The tel URI for Telephone Numbers
• RFC 3968  The Internet Assigned Number Authority (IANA) Header Field Parameter Registry for the Session Initiation Protocol (SIP)
• RFC 3969  The Internet Assigned Number Authority (IANA) Uniform Resource Identifier (URI) Parameter Registry for the Session Initiation Protocol (SIP)
• RFC 4028  Session Timers in the Session Initiation Protocol (SIP)
• RFC 4032  Update to the Session Initiation Protocol (SIP) Preconditions Framework
• RFC 4083  Input 3rd-Generation Partnership Project (3GPP) Release 5 Requirements on the Session Initiation Protocol (SIP)
• RFC 4092  Usage of the Session Description Protocol (SDP) Alternative Network Address Types (ANAT) Semantics in the Session Initiation Protocol (SIP)
• RFC 4117  Transcoding Services Invocation in the Session Initiation Protocol (SIP) Using Third Party Call Control (3pcc)
• RFC 4123  Session Initiation Protocol (SIP)-H.323 Interworking Requirements
• RFC 4168  The Stream Control Transmission Protocol (SCTP) as a Transport for the Session Initiation Protocol (SIP)
• RFC 4189  Requirements for End-to-Middle Security for the Session Initiation Protocol (SIP)

NAT Traversal

• RFC 3102  Realm Specific IP: Framework
• RFC 3303  Middlebox communication architecture and framework
• RFC 3489  STUN - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)
• Interactive Connectivity Establishment (ICE)   A Methodology for Network Address Translator (NAT) Traversal for Multimedia Session Establishment Protocols

POTS / Conformance

• Chapter 1 - Federal Communications Commission, Part 68 - Connection of Terminal Equipment To The Telephone Network.  This is a collated version of the segmented and sometimes broken documents found at the US GPO website
• ePanorama.net Telephone Technology Page   Nice technical overview on the technologies involved with telephones.  Many very good links to other sites as well for more detailed information.
• Telephone EMI  Nice FAQ stle page put out by the ARRL on telephone interference issues.
• Telephone Interference (Causes and Cures)  Interesting message to telecom@eecs.nwu.edu list back in '91 describing telephone interference.  Also includes Bell Systems document "RADIO SIGNAL SUPPRESSION FOR TELEPHONE SETS" and Information Bulletin FO-10, Federal Communications Commission, September 1986, "WHY TELEPHONE INTERFERENCE OCCURS".
• Radio Frequency Interference (RFI) Information Page   Several interesting links to FCC and Bell System reports on RFI.
• Caller ID FAQ
• What is Ringer Equivalence?
• FCC Testing Requirements  "Telephone and information technology equipment is required to under go FCC testing.  FCC has several parts that depending on the equipment, FCC testing to show compliance is needed. The following are the most common FCC testing standards..."
• Timco Engineering.  Another FCC Testing vendor.   Note the explicit reference under part 24 for telephones and PABX systems.
• Part 15 Regulations  PDF of the actual Part 15 regulations.