Carlos E. R. wrote:
On 2014-05-06 14:32, Per Jessen wrote:
Carlos E. R. wrote:
Talking of phones, Europe is 64 KBit/s channel, the USA is 56. The USA uses µ-law digitalization (companding algorithm), Europe A-law. International phone calls are not that easy to implement.
For the end-user, it's not an issue and I don't need to use the same phone (or technology) as my old mum when I call her. (except if I wanted to use Skype).
It is, or was, for instance, it you traveled with your modem and needed to connect on the hotel. Or if you set offices on different countries, you needed to get local hardware for the phones.
Still only compatible technology, just like today. With Skype, nothing is compatible. It's all or nothing.
Say... I don't know currently, but British home phone lines used a separate ring copper line, because that line was separated from the voice lines at the entry box to the home. So the plug needed that separate pin.
Presumably a very long time ago? When I lived in London in the late 90s, we had plain 2-wire copper cable running up the outside wall, seemed to be dating back to the 50s.
I don't know if this has changed. But the British are different: for instance, they had different power plugs on houses.
Many European countries do too, also for the phones. We're getting away from the topic though - that Skype isn't compatible with anything, even if you change the plug :-(
When I traveled there and bought a gadget, years ago, the power cord had no plug.
Yes, that is or was quite normal. I'm not sure of the reason, but you can probably find out here: http://en.wikipedia.org/wiki/Electrical_wiring_in_the_United_Kingdom
As I say, I don't know if this is still true. The European Union has enforced some standardization. Like increasing the voltage from 220 to 230 in Spain, silently. And conversely, lowering from 240 to 230 on others, I hope. Not sure about this.
I'm not sure, I don't think the EU has done anything about that at all, more likely the IEE or IEC. AFAIK, most mains devices have long accepted 220-240V, such that they can be used around the world (except the US and other 115V countries). As I'm sure you know, devices with switching supplies often accept far wider ranges of supply voltages.
Yeah, if only SIP was as popular as Skype.
Because it is not "click and shoot" install. Years ago you had to configure routers, it was not simple.
I agree, but I still wish it was. (I don't remember having to do anything special to a router though).
I do... NAT is a problem to traverse. Depends on your router.
No problem, I run a stund, that works. Also, SIP phones usually have a NAT keep-alive option (Linksys/SPA for instance). -- Per Jessen, Zürich (21.1°C) http://www.dns24.ch/ - your free DNS host, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org