Recently in SIP Category

Failover or failsafe?

June 18, 2010 10:06 AM | 0 Comments
I recently had a conversation about the need for PSTN failover. The basic proposition being that VoIP, IP telephony, SIP, Skype, etc. are OK, but if you have an IP network - be it broadband/DSL or SIP trunking, or an Ethernet WAN/LAN - you must have the option of being able to failover to the PSTN. Why?
Continue Reading...
Is the lack of widespread support for full 'five-9's' reliability in IP-based networks  holding back the adoption of IP communications?

It is certainly something we thought might be the case, and so we set our engineers the task of providing redundancy mechanisms for IP communications , based on Aculab's SIP stack, that would enable end customers to build in the reliability they were craving.

Our goal was to enable our customers to build enterprise and service provider communications platforms that could match the reliability and resilience of a legacy TDM-based system, but also give the full unified communications experience made possible by IP.
99_999% image.PNG
For over 30 years, designers of TDM networks have taken every step possible to minimise network downtime in search of the mythical 99.999% availability figure (just over 5 minutes downtime per year). The basic rule has been to eliminate any single point of failure. This philosophy has extended beyond simply duplicating the network hardware - separate buildings with separate power feeds and physical connecting cables are also a key part of a resilient network design.

For the IP-core network consisting of routers that are inherently designed to utilise multiple routing paths, this is not an issue; but for hardware attached at the network edge such as media processing servers, it is not so straightforward. An IP-based media server supporting VoIP and video services and using SIP for its signalling is one such platform that sits at the edge of the service delivery network.
Continue Reading...

Recent Comments

  • Houston CRM: Integrated communication is the new wave and it benefits any read more
  • los angeles unified communications: Having all types of communication integrated makes things so much read more
  • Kevin Rodak: Leaked military protoype test video ... lots of capability read more
  • Eddie Marietta: Extremely useful and informative article. I wish i can do read more
  • Erin Locknane: Stumbled into this site by chance but I’m sure glad read more
  • David: This is good information on FoIP, and you may want read more
  • Jules Turnner: Good job! read more
  • Ebonie Behrman: Awesome blog! read more
  • Aculab: Steve, Interesting scenario you have, and I am sure one read more
  • Steve Klinger: Hello Andrew, We have 14 offices across the world with read more

Subscribe to Blog


Recent Entry Images

  • 99_999% image.PNG

Recent Activity


  • Aculab tweeted, "New blog post from Aculab - Magic Quadrant for Contact Centre as a Service, Western Europe"
  • Aculab tweeted, "Want to build a cloud conferencing service? Download our latest walkthrough guide"



  • Aculab tweeted, "Do you know the cost of missed doctors appts? Find out how cloud communications can help"


  • Aculab tweeted, "New @aculab blog post - API Days  #api #cloud"
  • Aculab tweeted, "Using voice and messaging apps to improve healthcare. Read the white paper here "


  • Aculab tweeted, "New white paper - Accelerating innovations for healthcare apps with #voice & #messaging"
  • Aculab tweeted, "Thank you Dr Ladan Baghai-Ravary @aculab for your insight into #automated #healthcare The #speech research is quite something"


Around TMCnet Blogs

Latest Whitepapers

TMCnet Videos