davidn at davidnewall.com
Thu Jul 4 04:15:21 EST 2013
On 03/07/13 22:27, David Lyon wrote:
> the impression that I get from those in my business circles is
> that they don't mind paying for telephone services.
> Where you see their point is on the receiving side of telephone calls.
> If 'anybody' can make free voip calls, then anybody will call. I'm
> meaning telephone canvassors/telemarketers here.
This is a very interesting argument, and somewhat persuasive on first
Yet, unlike PSTN, you can't call every possible SIP address because
there are a near infinity of them. On PSTN you have a low-cost per call
in a limited range of guessable numbers; via SIP it's zero-cost per call
but an infinite and unguessable range. At only a few dollars per hour,
the human cost of calling dominates regardless of PSTN or VoIP. On
second thoughts I think you could convince your business associates that
their fear of telemarket calls is exaggerated. With only minimal
decrease in cost to the enemy, It's unlikely to get worse than it is now.
As to difficulties configuring SIP phones and servers. I've not done
this but I can see that it's of a similar complexity to configuring
email clients and servers; from which one might expect that most people
will use a third-party SIP service to avoid maintaining their own
server; and those service providers will give a few lines of
configuration to put into your SIP phones, just as email providers give
a few lines of configuration for your mail client.
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