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The 7920 phone from cisco is a Wireless 802.11b phone. Cisco does not provide any SIP firwmare for this Wireless Phone. Only the Skinny protocol is supported. WEP and WPA security are supported with the latest firmwares so…

If you are replacing an analog PSTN line with VOIP service, in addition to ordinary phones, there may be other devices that contain data modems that were using the PSTN line. Examples are: Tivo, POS Terminals, FAX machines,…

Synopsis: Lookup caller name from TXT record Deprecated: As of Asterisk 1.2, you should now use the dialplan function instead of this application. Description: TXTCIDName(CallerID[|options]) Looks up a Caller Name via DNS and sets the variable ‘TXTCIDNAME’. TXTCIDName…

With ISDN & chan_capi, callerID works fine. For zap devices: /usr/src/asterisk/channels/chan_zap.c #define DEFAULT_CIDRINGS 2 (usual default is 1) For vpb (Voicetronix) devices: callerid=yes needs to be set before each channel unless running CVS asterisk after 13/12/2004 Don’t forget,…

Failover switches (also called Fallback, Line Protection, or A/B Fallback switches) can switch a circuit between two based on a manual or automatic trigger. Some can be controlled via TCP/IP. POTS line failover Grandstream HA100 High Availability Controller…

John Todd, of loligo.com advises: Before running any application that has sound playback (Playback, Asterisk cmd BackGround, VoiceMailMain2, etc.) it would be wise to execute an Answer first, then a Wait(2) to allow for VoIP channels to fully…

This guide should enable you to use the Cisco 7960 Phone with SCCP load and the Cisco 7914 Operator Console together with the Asterisk PBX and chan_sccp-b Latest chan_sccp-b code from http://chan-sccp-b.sourceforge.net/ Take care you should svn the…

As of Asterisk 1.4 the preferred method for determining if a file exists is using the STAT function: Asterisk func stat Asterisk Tips and Tricks: Branching depending on the existance of one or more files on the local…

SRGS is a W3C markup language standard for speech recognition, used in the VoiceXML standard and other IVR / speech platforms. This document defines syntax for representing grammars for use in speech recognition so that developers can specify…

“CLASS” codes or “VERTICAL SERVICE CODES” Custom Local Area Signalling Services Note this list is conforming to US standards – European countries often use different codes (a list can be found where ?) like *21 for call-forward-immediate, *61…

Florida Tier 3 Peers Please use the peer listing format to list your information. Use the following links to locate a Tier 3 peer: Pro-Medical, Inc. BANDWIDTH: 1.54 mb/s PUBKEY: COUNTRY: UNITED STATES STATEPROV: FL AREACODE: 352 CONTACT:…

From the RFC 3219 : This document presents the Telephony Routing over IP (TRIP). TRIP is a policy driven inter-administrative domain protocol for advertising the reachability of telephony destinations between location servers, and for advertising attributes of the…

DNIS, Dialed Number Identification Service From Wikipedia, DNIS is defined as follows: “Dialed Number Identification Service (DNIS) is a service sold by telecommunications companies to corporate clients that lets them determine which toll-free telephone number was dialed by…

2004-09-23 The four of the top contributors to this website who were present at this afternoon’s Astricon session each received an unexpected reward for their ongoing contributions to this website: a brand new Uniden UIP 200 IP phone….