Do ISPs Block VoIP?
Having used VoIP problem free for for ages I was perplexed as to why recently I had been having so many problems. Sound quality has gone right down and latency issues have increased significantly. Users on VoIP online forums in the US and other countries, such as France and Mexico, having issues since last year. For a while Voice over IP might seem like a good deal for the average person, entrenched interests in the telecoms industry view it differently - and are taking action against it.
Consultation
Well aware of what has happened elsewhere the UK telecoms regulator Ofcom took the unusual action in January of announcing that it will look at the burgeoning Voice over IP industry and report next month on whether new laws are necessary to shield it. The consultation document says: “VoIP service providers have expressed concern that their ability to provide a reliable service may be impacted by internet access providers (ISPs) selectively degrading or blocking their VoIP traffic.”
Ofcom says it has no proof this is happening in the UK; only about half a million customers use it. But the prediction is for that to increase by 2.5m in the next six months.
And VoIP barring occurs in other countries, more often than not those where there is still only a single incumbent telecoms company. In Saudi Arabia, for instance national carrier Saudi Telecom is using software from US supplier Narus to bar all Voice over IP phone calls.
Telcos in the US and other countries are hesitant to have their bandwidth used by traffic from which they earn no revenue and have been challenged over similar alleged incidents of internet telephony barring. Blocking internet telephony traffic is a challenge but not illegal and barring specific kinds of internet traffic is on the increase.
Luxembourg-based VoIP provider Skype who are now owned by the pre-eminent auction site eBay has been particularly controversial. Skype is used by over 75m people. But not everyone wants Skype on their network.
Skype is seen by many to pose a potential security risk as it opens an encrypted channel out of the network and forms supernodes that sit on it and connect VoIP calls. There is considerable debate about how much bandwidth such supernodes eat up. There have been claims that in supernode mode, Skype may even saturate a 100 Mbps line.