Overview of Platforms with SIP / XMPP Support

What follows is an incomplete list of leading vendors who are using the main protocols described in one of the previous blog articles: SIP and XMPP. This list is based on my personal knowledge. I apologize in advance for any exclusions.

The goal is to provide material for further analysis by the reader.


Cisco was one of the first to embrace the potential of Unified Communication systems and open standards.

Cisco historically selected MGCP and H.323 as VoIP protocols. SIP was later introduced, first on endpoints and then on servers.

Jabber, Inc., is a provider of presence and messaging software. It’s important to note that Cisco has acquired this company not the open standard Jabber (jabber.org). Jabber, by that point, had already been renamed to XMPP.

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SIP trunking. The difference between PSTN, ISDN and VoIP.

sip trunkingYears ago when VoIP first appeared on the scene, in the time of dial-up Internet, it was associated with poor audio quality and dropped calls. Today it is no longer a problem, thanks to the increased availability of broadband Ethernet services. Large and small companies, public administration organizations worldwide opt for VoIP, while some other enterprises are still hesitant to make the move.

It might be just the right time to learn more about VoIP technology and SIP trunking: the largest telecom providers all around the world stop offering ISDN and PSTN in 2018 and have announced complete phasing-out over the next ten years.
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