voip sip telephony
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More businesses turning to VoIP?
News One example is session initiation protocol (SIP) trunking interfaces being added to equipment by many PBX manufacturers, which makes it easier for business telephone exchanges to be connected to the public switched telephone network (PSTN) via the... [14 Aug 2008]
Mitigating Attacks in VoIP Environments
White Paper Wide-scale Voice over IP (VoIP) implementations based on Session Initiation Protocol (SIP) and H.323 are gaining traction and are starting to be heavily deployed in large enterprises. VoIP is becoming an equivalently pervasive solution in the Small... [09 Jul 2008]
Credit Union Simplifies With SIP-Based IP PBX Communications Solution
White Paper SIP is an emerging standard for IP telephony designed as a simpler, more open and flexible alternative to its predecessor, H.323 - still used today by the majority of voice over IP (VoIP) vendors. It also made this decision to take advantage of... [03 Jul 2008]
SIP: Launching the IP Communications Revolution
White Paper SIP, because of its basis in web technologies, is positioned not to replace H.323 in this enabler role, but to enable the next revolution where communications services will be integrated seamlessly and intuitively into the daily work environment... [03 Jul 2008]
A Comparison of H.323v4 and SIP
White Paper Two standards have emerged for signaling and control of VoIP telephony: ITU-T H.323 and the IETF Session Initiated Protocol (SIP). This contribution compares and contrasts SIP to H.323v4 to help aid operators and vendors in the selection of a... [03 Jul 2008]
Application Notes for VegaStream Europa 50 BRI Gateway
White Paper This paper explains describe the configuration procedures required to allow VegaStream Vega50 Europa BRI gateway to interoperate as a TDM to SIP and SIP to TDM converter on the 3Com VCX platform for VoIP applications. [03 Apr 2008]
VoIP threats to watch out for
Comment The increasing adoption of session initiation protocol (SIP) for VoIP is expected to open up a whole new front in the security war. Examples of hacks for SIP include registration hijacking, which allows a hacker to intercept incoming calls and... [09 Mar 2007]
Deploying Office Live Communications Server 2005 and Office Communicator 2005 at Microsoft
White Paper Live Communications Server 2005 also provides long-term value as a platform for applications and solutions (such as custom real-time communications, Voice over IP (VoIP) telephony applications and the Microsoft Office System) that use SIP to... [08 Nov 2006]
Radioactive: Mobile VoIP - not so disruptive
Comment They utilise SIP to set up calls irrespective of bearer channel, and let the user have a single number for the device. It might be fairer to call these internet telephony rather than VoIP. Completely independent of the Skype deal, 3 Italy launched... [20 Mar 2006]
Cisco gets serious about mobile wireless
News Now the company is adding support to more devices, such as its 12000 IP router, which combines the functionality of an IP edge router and a Session Border Control device that controls and manages IP multimedia traffic using protocols such as... [06 Dec 2005]
VoIP handsets: Greater choice means greater complexity
Comment Mark Herbert, CEO of managed services provider intY, which uses SIP-compliant handsets and PBX from Zultys, says: "Using VoIP, for the first time you could go to an open standard. As session initiation protocol (SIP) becomes more widely adopted for... [01 Aug 2005]
Linux comes to the telephone
Comment He is able to use any SIP-compliant handset, and currently has systems from three manufacturers - Grandstream, Snom and Zultys - which all have different feature sets and prices. They chose a system supplied by specialist VoIP company Telappliant... [06 Jul 2005]
Nokia: Skype must change or die
News Nokia today announced a partnership with Avaya which will give users of Nokia Series 60-based smart phones and Avaya IP PBXs to have a single business number and voicemail, as well as PBX-style call logging for the smart phones and SIP capabilities. [13 Jun 2005]
Overview of the Session Initiation Protocol
White Paper Like other VoIP protocols, SIP is designed to address the functions of signaling and session management within a packet telephony network. Session Initiation Protocol (SIP) is the Internet Engineering Task Force's (IETF's) standard for multimedia... [27 Dec 2004]
Dual Tone Multifrequency Relay for SIP Calls Using Named Telephone Events
White Paper The SIP NTE DTMF relay feature provides reliable digit relay between Cisco VoIP gateways when a low bandwidth codec is used. This paper describes the Dual Tone Multifrequency (DTMF) Relay for SIP Calls Using Named Telephone Events (NTE) feature in... [27 Dec 2004]
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