Guys sorry to jump in mid thread, however some of you might know how do the voice carriers handle SLA's. I know our telco voice guys seem to live on SLA's. I can not rember the last time there was any kind of widespread voice outage on an international network. Regards, Kevin -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of Peter Galbavy Sent: 29 December 2001 09:35 To: Sean Donelan Cc: nanog@merit.edu Subject: Re: Automated DLR conflict detection
On Sun, 23 Dec 2001, Peter Galbavy wrote:
You misunderstand. Which operators will offer this (backed by some underwritten insurance) in an effort to be better than the competition ?
Buying car insurance doesn't alter the chances of your car breaking down on a long trip. Insurance doesn't alter the chances of something bad happening. Driver training, seat belts, and spare tires are things which can reduce risk.
A warranty is not a substitute for due dilegence.
How can you perform due dilegence on a carrier? With a car, you can open the trunk and check the spare tire. What is the best way to check a spare circuit?
To me, the diverse route *is* the safety belt. If it does not work when it is supposed to, I (or my mourning relatives) will sue the car companies arse off - if the attribution for the failure rests with a design of manufacturing flaw. Safety / Seat belts are not decoration - and neither should a diverse route or protection circuit be. (Yes, my English can boldly go... but I am still waiting for the coffee to finish.) Peter ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. For more information contact postmaster@lancomms.ie phone + 353 1 4093000 fax + 353 1 4093001 **********************************************************************
On Sat, 29 Dec 2001, Kevin Gannon wrote:
Guys sorry to jump in mid thread, however some of you might know how do the voice carriers handle SLA's. I know our telco voice guys seem to live on SLA's.
I can not rember the last time there was any kind of widespread voice outage on an international network.
Telephone companies use SLA's to exclude many types of outages from their reporting statistics. Large telephone users (telemarketers, call centers, etc) have many of the same difficulties data people have with carriers. Third-party measurements of telephone call completion rates come up with much lower numbers than the carriers report. The international telephone network is extremely vulnerable to congestion. And several developing countries have almost perpetual problems with their telephone systems. "Widespread" is one of those vague terms. If your phone works, is it a widespread problem? Not even the ITU collects statistics on the performance of the global telephone network. Even monopoly PTTs consider it proprietary information.
participants (2)
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Kevin Gannon -
Sean Donelan