[asterisk-users] Hardware that can ring my phone?

[Linux Lover]

Wow! Thank you so much, James - you have certainly
clarified lots of things in my mind. You are correct
about me overlooking the feedback issue (with the
el-cheapo device). I see that I have to learn. This
world of VoIP is new and mind boggling - to me.

Thanks,
Lynn


--- James FitzGibbon <james.fitzgibbon at gmail.com>
wrote:

> On 8/1/07, Linux Lover <linuxlover992000 at yahoo.com>
> wrote:
> >
> > > This SOHO PBX box won't interop with Asterisk
> > > because it doesn't speak any
> > > of the protocols that Asterisk does.  This box
> >
> > I tend agree with your evaluation. Still, I was
> > thinking that since all these el-cheapo SOHO PBX
> boxes
> > support manual attendant call transfer, what's to
> > prevent Asterisk from mimicking an attendant by
> > sending proper DTMF signals and make this box
> > "transfer" the call to the single analog phone in
> the
> > business? That is, Asterisk will connect (via
> RJ-11)
> > to the unit as the "attendant's phone", and my
> real
> > phone (only one in the system) will connect via a
> > second RJ-11 (there could be 4 of them).
> >
> > Or is Asterisk not capable of sending DTMF signals
> > over an RJ-11 connection?
> 
> 
> You can send arbitrary DTMF over any of Asterisk's
> channels from the
> dialplan.  I just figured that this level of
> integration was a bit deeper
> than you were looking for as a first project.  It
> would be an interesting
> experiment, to be sure.  The biggest issue I'd think
> would be feedback - you
> can send the DTMF along the wire, but how do you
> know that the SOHO box
> interpreted it correctly?  If the only feedback is
> designed for a human (i.e.
> auditory), then interpreting those cues with
> Asterisk would be non-trivial.
> 
> 
> > Do I undestand correctly that with this solution,
> I
> > will still be able to connect to my analog Verizon
> > phone line with the SIP phone? That is, the
> outside
> > world will see my phone as an ordinary phone, when
> in
> > fact I am using a SIP phone? If so, that means
> that
> > Asterisk does all the magic behind the scene,
> right?
> 
> 
> Yes, your Verizon POTS line would go into a FXO port
> in your server (which
> in Asterisk would be referenced as the channel
> "Zap/1" - zaptel being
> Asterisk's TDM driver) and your SIP phone would
> connect via your standard
> office network and be referenced as
> "SIP/whateverusernameyouwant".
> 
> A very simplistic example of bridging a call would
> be:
> 
> [from-verizon]
> exten => s,1,Dial(SIP/whateverusername)
> 
> Assuming that you'd configured zaptel to route calls
> that come in on the FXO
> port to the Asterisk context named "from-verizon",
> then any such calls would
> immediately cause Asterisk to ring your SIP phone,
> and if answered to bridge
> the two calls together.
> 
> A more complex example that makes them press one to
> call you and otherwise
> lets them leave a message:
> 
> [from-verizon]
> exten =>
> s,1,Background(Press1ToTalkOr2ToLeaveAMessage)
> exten => s,n,WaitExten(10)
> 
> ; timeout
> exten => t,1,Goto(vm,1)
> 
> ; invalid
> exten => i,1,Goto(vm,1)
> 
> ; press 1
> exten => 1,1,Dial(SIP/101,20)
> exten => 1,n,Goto(vm,1)
> 
> ; press 2
> exten => 2,1,Goto(vm,1)
> 
> ; all voicemail activity ends up here
> exten => vm,1,VoiceMail(u101)
> exten => vm,n,Hangup
> 
> [from-officephone]
> exten => *98,1,VoiceMailMain
> extne => *98,n,Hangup
> 
> Assuming you've now set up your SIP phone as
> extension 101, this would play
> a sound file saying "press 1 to talk to 2 to leave a
> message".  If they
> press 1, your SIP phone rings.  If they press 2,
> they go to voicemail.  If
> they wait 10 seconds without pressing anything, or
> press something other
> than 1 or 2, they also go to voicemail.  If they
> press 1 to dial your phone
> and you don't pick up after 20 seconds, they go to
> voicemail.
> 
> On your deskphone (could just as easily be a SIP
> softphone if you prefer),
> you can dial *98 to log in and pick up your new
> voicemail messages.
> 
> Hope that demystifies some of what you're trying to
> do.
> 
> -- 
> j.
> > _______________________________________________
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