ISDN Features
Posted: July 28, 2005 Common ISDN Supplemantary Services CLIP: Calling Line Identification Presentation CLIP – no screening: CLIP can be modified by the caller out of the bounds of it’s assigned number space CLIR: Calling Line Identification Restriction. CLIP is supressed. COLP:…
Read More »PRI
Posted: July 28, 2005 ISDN connections are delivered in two variants, PRI – Primary Rate Interface and BRI – Basic Rate Interface. PRI is the standard for connections to offices. It’s based on a T1 line in the US, and E1 line…
Read More »ISDN
Posted: July 28, 2005 ISDN (Integrated Services Digital Network) A series (I-series) of ITU standards for digital telephone service. ISDN is usually provided in two variants: BRI: Basic Rate Interface – BRI was never very popular but does still exist in North…
Read More »ITU
Posted: July 28, 2005 http://www.itu.int/ The International Telecommunications Union, in Geneva, Switzerland is an international organization within the United Nations System that issues ‘Recommendations’ for global telecom networks and services. Examples: E Series: Network Operations H Series: Audiovisual and Multimedia systems –…
Read More »RFC3372
Posted: July 28, 2005 RFC 3372: Session Initiation Protocol for Telephones Abstract The popularity of gateways that interwork between the PSTN (Public Switched Telephone Network) and SIP networks has motivated the publication of a set of common practices that can assure consistent…
Read More »check_asterisk
Posted: July 28, 2005 Asterisk SIP Channel Nagios Plugin Special thanks to Nils Ohlmeier for writing SIPSAK and Alexander Mayrhofer for writing the original version of this plugin for SER. The Nagios Check command can be something like: ‘check_asterisk’ Asterisk command definition…
Read More »Configuring GSM VoIP gateways with Cisco Call Manager
Posted: July 28, 2005 Configuring GSM VoIP gateways with Cisco Call Manager The present document is a step-by-step guide for configuring the GSM VoIP gateways 2N VoiceBlue Lite (VBL), 2N VoiceBlue Enterprise (VBE) and Cisco Call Manager (CCM) software IP PBX. It…
Read More »Asterisk SCCP channels
Posted: July 28, 2005 SCCP channel drivers in Asterisk There are 2 variants of SCCP channel drivers which exist for the Asterisk PBX: Supplied driver with Asterisk chan_skinny or Asterisk channel skinny The “original” Driver written by Jeremy McNamara & Florian Overkamp…
Read More »MozPhone
Posted: July 28, 2005 Mozphone has been renamed MozIAX and now has a home page at mozdev.org This is a stub page to contain information about how to configure MozPhone to work with Asterisk. Usage Choose MozPhone in Firefox Tools menu. You…
Read More »How to start a Clec
Posted: July 27, 2005 How to become a CLEC(Well ok, just a start) Extracted with thanks from http://www.robotics.net/papers/clechowto.html By: Nathan Stratton nathan@robotics.netThis is a draft document, please email me with changes or suggestion nathan@robotics.net Introduction The Telecommunications Act if 1996 (Act) opened…
Read More »RFC 3903
Posted: July 27, 2005 Session Initiation Protocol (SIP) Extension for Event State Publication Abstract This document describes an extension to the Session Initiation Protocol (SIP) for publishing event state used within the SIP Events framework. The first application of this extension…
Read More »Asterisk Cisco CallManager Integration
Posted: July 27, 2005 Why integrate Cisco CallManager and Asterisk? Features: Asterisk provides features that CallManager by itself does not. Migration: Allow a gradual migration from a closed source PBX to open source PBX. There are two ways to accomplish this: Using…
Read More »ENUM – The bridge between the switched telephony network and the Internet
Posted: July 27, 2005 Page Contents News IETF Documents Selected List of Published RFCs Internet Drafts in the Pipeline ENUM Experts Various Information on ENUM Current ENUM deployment status in various countries Software support Record syntax Organizations involved with ENUM Links Articles…
Read More »STUN clients
Posted: July 27, 2005 Known STUN clients: xten softphones: X-Lite, X-PRO, eyeBeam Linux client on http://sourceforge.net/projects/stun/ SNOM Phones Cisco Ata v 3.0 firmware pbxnsip PBX for trunks Grandstream Budgetone and Handytone Hotsip Active Client Sipura All SPA Products Leadtek Research BVA8051, BVA8052,…
Read More »Asterisk mark2 echo canceller
Posted: July 27, 2005 Echo cancellation in Asterisk — ECHO_CAN_MARK2 based on code available from Mississippi State Univerisity Paramters (in mec2_const.h) DEFAULT_BETA1_I 1/(compromise stepsize constant, beta1); higher value means a slower update DEFAULT_SIGMA_LY_I -log2(filter constant) for reference power estimate; higher value…
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Phone System 