[Asterisk-doc] extensions.conf section

[Philipp von Klitzing]

Hiya!

> Boy, this was a much more friendly break down than I expected. Of
> course it is the first to really break it down. 

:-))

> > In general: Maybe it'd be nice to have a very minimal setup provided in 
> > the book (see recent discussion on users-l) that just lists two SIP 
> > devices and a minimalistic extensions.conf with the two devices, fwd 
> > dialout (and maybe iaxtel dialout) and voicemail (so skip the demo).
> 
> My intention was to do a quick run through what was needed and reinforce
> contexts in every example, but to keep examples simple and short

Agreed, wrong place. But that's something for the appendix then, I 
believe. And a hint/link here (or from some other prominent place) to 
that appendix might be nice. That has potential to greatly to lower the 
volume on users-l.

> > 				<lineannotation>; Make sure we wait long enough for the CallerID to 
> > be received.</lineannotation>
> > 
> > This remark is only valid for analog calls, I assume?
> 
> Yes, an no. Depends on how you are receiving CallerID. If it is via the
> FSK then it is valid. If it is on a VoIP or PRI line then no it isn't
> valid. But for a quick run through it doesn't cause problems.

If you leave it in like that then people might think this is always 
necessary, so my suggestion would be to add the "via the 
FSK then it is valid. If it is on a VoIP or PRI line then no it isn't 
valid" part

> > In Europe that's typically 0 instead of 9.
> 
> Okay, I was concerned about specifying a digit, but I have also run into
> a few systems here with an 8 also. Maybe specifying the two digits would
> be bad.

I was actually driving at something else: There are many places where the 
current Asterisk documentation is very US-centric (which is 
understandable due to the headstart of VoIP there). Still, once a while 
that makes understanding descriptions more difficult since the reader 
first has to guess how things work in the US - not everyone is familiar 
with those conventions. It'd be great to take a more global approach 
whereever possible.

Another example is 911 - we use 110 and 112 over here, and I guess not 
everyone will now what 911 is all about, including the "address 
resolution" that is apparently connected to this service (that is news to 
me, for example). On the other hand you might not know what "Call-By-
Call" and "Carrier Pre-selection" are (results of the EU commissions 
efforts to liberalize the telco markets).

In short: If we want Asterisk to grow also on other continents then we'd 
need to take that into account as well.

Cheers, Philipp