Using VoIP phones directly to one another.. ..

Just wonder if anyone has done this and if so quite how did U do it..

We need to have a VoIP phone at one end of a circuit this goes to a
router at end A with a VPN to end B. At end B there is an ATA which then
goes to a phone line to radio converter when controls a Two way radio
system.

Operation would be end A would pick up their phone and dial distant end
a simple number as possible or a preset dial.. Phone line rings at other
end (B) phone to radio device answers that " incoming call" and then
puts radio system on air and conversation goes ahead radio is in
permanent transmit for call duration.

When Radio line calls controller radio has a simple device set up to
detect a a 5 tone sequence .. radio to phone device can size the line
and dial out to end A thus ringing that phone..

I presume it is possible to connect Two VoIP devices end to end over a
VPN without an asterisk or similar unit in or on the way?..

cheers.....
--
Tony Sayer

In article <XGKWvtPUT7ROFwYj@bancom.co.uk>,
tony sayer <tony@bancom.co.uk> wrote:
>
>Just wonder if anyone has done this and if so quite how did U do it..
>
>We need to have a VoIP phone at one end of a circuit this goes to a
>router at end A with a VPN to end B. At end B there is an ATA which then
>goes to a phone line to radio converter when controls a Two way radio
>system.
>
>Operation would be end A would pick up their phone and dial distant end
>a simple number as possible or a preset dial.. Phone line rings at other
>end (B) phone to radio device answers that " incoming call" and then
>puts radio system on air and conversation goes ahead radio is in
>permanent transmit for call duration.
>
>When Radio line calls controller radio has a simple device set up to
>detect a a 5 tone sequence .. radio to phone device can size the line
>and dial out to end A thus ringing that phone..
>
>I presume it is possible to connect Two VoIP devices end to end over a
>VPN without an asterisk or similar unit in or on the way?..

Yes, it's possible - if they're on the same LAN or 2 different LANs
routed, or bridged by a VPN - the key is no NAT between the LANs.

Then you consult each phones/ata manual to work out how to do direct IP
dialling - one some phones you simply dial the IP address as a 12-digit
string - e.g. 192168001002 to dial 192.168.1.2...

You may need to consult the phone/ata manual to allow it to recieve direct
connections too.

Some phones can pre-dial a fixed number/IP when you lift the handset too
(batphone mode) or have built-in speed-dials, etc.

So once the network is working, it boils down to RTFM :)

(I've done this with Grandstreams, but I'm sure other phones allow it too)

Gordon

tony sayer wrote :
> Just wonder if anyone has done this and if so quite how did U do it..
>
> We need to have a VoIP phone at one end of a circuit this goes to a
> router at end A with a VPN to end B. At end B there is an ATA which then
> goes to a phone line to radio converter when controls a Two way radio
> system.
>
> Operation would be end A would pick up their phone and dial distant end
> a simple number as possible or a preset dial.. Phone line rings at other
> end (B) phone to radio device answers that " incoming call" and then
> puts radio system on air and conversation goes ahead radio is in
> permanent transmit for call duration.
>
> When Radio line calls controller radio has a simple device set up to
> detect a a 5 tone sequence .. radio to phone device can size the line
> and dial out to end A thus ringing that phone..
>
> I presume it is possible to connect Two VoIP devices end to end over a
> VPN without an asterisk or similar unit in or on the way?..
>
> cheers.....

Take a look at these for some specific examples relating to
Linksys/Cisco SPA kit. They're a bit old now, however, they should
point you in the right direction.

<http://www.provu.co.uk/pdf/sipura/spa_backtoback_1x_spa3000_and_1x_spa1001.pdf>

<http://www.provu.co.uk/pdf/sipura/spa_backtoback_2x_spa3000.pdf>

<http://www.provu.co.uk/pdf/sipura/spa_backtoback_2x_spa3000_and_1x_spa2000.pdf>

In article <mn.73697db8486f1fa7.88534@blueyonder.invalid>, Jono
<nothanks@blueyonder.invalid> scribeth thus
>tony sayer wrote :
>> Just wonder if anyone has done this and if so quite how did U do it..
>>
>> We need to have a VoIP phone at one end of a circuit this goes to a
>> router at end A with a VPN to end B. At end B there is an ATA which then
>> goes to a phone line to radio converter when controls a Two way radio
>> system.
>>
>> Operation would be end A would pick up their phone and dial distant end
>> a simple number as possible or a preset dial.. Phone line rings at other
>> end (B) phone to radio device answers that " incoming call" and then
>> puts radio system on air and conversation goes ahead radio is in
>> permanent transmit for call duration.
>>
>> When Radio line calls controller radio has a simple device set up to
>> detect a a 5 tone sequence .. radio to phone device can size the line
>> and dial out to end A thus ringing that phone..
>>
>> I presume it is possible to connect Two VoIP devices end to end over a
>> VPN without an asterisk or similar unit in or on the way?..
>>
>> cheers.....
>
>Take a look at these for some specific examples relating to
>Linksys/Cisco SPA kit. They're a bit old now, however, they should
>point you in the right direction.
>
><http://www.provu.co.uk/pdf/sipura/spa_backtoback_1x_spa3000_and_1x_spa1001.pdf>
>
><http://www.provu.co.uk/pdf/sipura/spa_backtoback_2x_spa3000.pdf>
>
><http://www.provu.co.uk/pdf/sipura/spa_backtoback_2x_spa3000_and_1x_spa2000.pdf>
>
>

Thanks Jono and Gordon looks like it will do the job:)....

Cheers...
--
Tony Sayer

>Some phones can pre-dial a fixed number/IP when you lift the handset too
>(batphone mode) or have built-in speed-dials, etc.
>
>So once the network is working, it boils down to RTFM :)
>
>(I've done this with Grandstreams, but I'm sure other phones allow it too)
>
>Gordon

Just as a follow up to the above anyone know if you can get a VoIP fone
to call Two other phones (VoIP ones that is) numbers at the once like
dialling up a conference call as it were?..

The phones to be called will auto answer...
--
Tony Sayer

In article <WzaGipC0DNZOFw7l@bancom.co.uk>,
tony sayer <tony@bancom.co.uk> wrote:
>>Some phones can pre-dial a fixed number/IP when you lift the handset too
>>(batphone mode) or have built-in speed-dials, etc.
>>
>>So once the network is working, it boils down to RTFM :)
>>
>>(I've done this with Grandstreams, but I'm sure other phones allow it too)
>>
>>Gordon
>
>Just as a follow up to the above anyone know if you can get a VoIP fone
>to call Two other phones (VoIP ones that is) numbers at the once like
>dialling up a conference call as it were?..

It's not sometimes I've seen...

>The phones to be called will auto answer...

You could - dial one phone via IP, then when that answers, put the call
on hold, then dial the other phone via direct IP, then use the phones
own conference facilities to join both together.

But really - you need a little VoIP PBX to make life easy.

Gordon

In article <WzaGipC0DNZOFw7l@bancom.co.uk>,
tony sayer <tony@bancom.co.uk> writes:
> Just as a follow up to the above anyone know if you can get a VoIP fone
> to call Two other phones (VoIP ones that is) numbers at the once like
> dialling up a conference call as it were?..
>
> The phones to be called will auto answer...

The Safecom SDSIP-5000 phone can do this (the conferencing is done
inside the phone, and it makes multiple SIP calls).

My reservation would be that I've seen the lesser spec'ed SDSIP-3000
mishandle registering over STUN (it keeps changing the local port,
but will only accept calls on the originally specified local port,
which isn't likely to work with some providers).
I don't know if the SDSIP-5000 has the same issue - I haven't used
it with STUN.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Sep 5, 2:39*pm, tony sayer wrote:
> Just as a follow up to the above anyone know if you can get a VoIP fone
> to call Two other phones (VoIP ones that is) numbers at the once like
> dialling up a conference call as it were?..
>
> The phones to be called will auto answer...

Yes.

Multicast VoIP paging / public address (in the tannoy sense, not the
IP sense)

http://www.voip-info.org/wiki/view/A...g+and+Intercom

Owain