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On Fri, Jan 02, 2009 at 02:37:21PM +0000, Gordon Henderson wrote: > > So as I've er... volunteered to talk about asterisk tomorrow, are there > any pressing questions people want answering? I was just thinking of > putting something together about what it is, and how it works, and > something about VoIP in-general, but if anyone has any specific interest, > then drop me an email and I'll see what I can do... > From my reading so far, I would be very grateful if you could provide any light on any of the following: - What holes do I need to poke in a network firewall: going from this, what sort of network structure would you recommend and how would you protect the VoIP from poor security, loss of privacy / eavesdropping, spam. Going on from this is the whole issue of encryption. - Voice quality (largely answered in your earlier email) - What sort of hardware, software, providors do you like using? Follow on questions: - How can we determine who are good providors / bad providors? (A random selection of vendors include: Skype, tuxphone.co.uk, sipgate.co.uk, tesco, voipstunt, voipcheap) - Hardware - What sort of phones? - Routers, firewalls, Analog Adapters? - Software: - for softphones, any issues - If I buy a VoIP number from one providor, then can I keep the number and switch providors? Using a PBX - Are there advantages to having your own pbx or using a centrex type service (eg both www.gradwell.co.uk and www.tuxphone.co.uk offer a £8.50 number + "unlimited" UK minutes to landlines). - for PBX there is Asterisk, but there are also various flavours of this. (Freepbx, AsteriskNow, Trixbox). Any preferred implementations (or any implementations best avoided) - Some websites stated that Asterisk should not be installed as(by) root. Does this matter in Debian? (For others reading this, Debian installed very easily and I had a working system running on my lan in about 30 minutes: I have not tried going outside the lan as yet) - There seem to be two protocols involved: SIP and IAX2. What do you recommend and why? - SIP has more hardware - IAX is more modern, uses less bandwidth and is easier to set up thru firewalls I have not asked the question as to whether the PBX should link directly to PTSN as frankly the hardware costs of that alone seems to be around £200+ mark; and hence seems more corporate; unless there are general issues involved. And happy new year to all -- Henry Photocopies or faxes of my signature are not binding. This email has been signed with an electronic signature in accordance with subsection 7(3) of the Electronic Communications Act 2000. Digital Key Signature: GPG RSA 0xFB447AA1 Fri Jan 2 17:28:32 GMT 2009
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