Tim explained :
> Jono wrote:
>> Does anyone have any experience of the Snom 370 & its VPN abilities?
>
> I have a Snom370 here, but I haven't tested out the VPN yet.
I very dare you to!
>
>> What sort of VPN client does it have?
>
> OpenVPN
>
> Basically, you load the VPN enabled firmware onto the Snom370, then you
> make an openVPN config tarball, and away you go.
Ah, having never played with openVPN, does that mean it will only
connect to an openVPN host?
>> Would help enormously with remote extension on an IP PBX.
>
> Yes, in a massive way. If PBX is natted and phone is natted, then easy.
Exactly.
Incidentally, is the openVPN config tarball only for the 370?
>>> What sort of VPN client does it have?
>>
>> OpenVPN
>>
>> Basically, you load the VPN enabled firmware onto the Snom370, then you
>> make an openVPN config tarball, and away you go.
>
> Ah, having never played with openVPN, does that mean it will only
> connect to an openVPN host?
Yes, but then OpenVPN runs on just about anything.
alexd brought next idea :
> Jono wrote:
>
>> Tim explained :
>>> Jono wrote:
>
>>>> What sort of VPN client does it have?
>>>
>>> OpenVPN
>>>
>>> Basically, you load the VPN enabled firmware onto the Snom370, then you
>>> make an openVPN config tarball, and away you go.
>>
>> Ah, having never played with openVPN, does that mean it will only
>> connect to an openVPN host?
>
> Yes, but then OpenVPN runs on just about anything.
Yes, I've been looking. I was originally hoping it could be used on an
existing VPN that's runing on a Windows ISA server.
Jono wrote:
>> I have a Snom370 here, but I haven't tested out the VPN yet.
>
> I very dare you to!
I've spent much of the last 2 days tracing and investigating much more
interesting things with Snoms than trying out new features.
For instance.
7.1.9 supports overlap dialling properly
Snom 320 versions prior to 6.5.4 will not work on the latest batch of
phones from Snom.
> Ah, having never played with openVPN, does that mean it will only
> connect to an openVPN host?
Yes. But the software is freely downloadable and runs on windows or
Gnu/linux really easily. Also gives you the option of running over
TCP or UDP and in either layer2 bridge mode or routed IP mode.
On the other hand, because of so much flexibility, configuration can be
complex.
> Incidentally, is the openVPN config tarball only for the 370?
>
> I can see myself ending up with a 370....!
Yes. Only a Snom370 has enough Flash and RAM to run it.
370s are really nice in other ways too. The displays are really really
nice. Back lit in blue, greyscale and a higher res than the 360.
Tim submitted this idea :
> Jono wrote:
>> Yes, I've been looking. I was originally hoping it could be used on an
>> existing VPN that's runing on a Windows ISA server.
>
> Forget the ISA bit - just install openVPN on the same server.
>
After serious thinking Tim wrote :
> Jono wrote:
>>> I have a Snom370 here, but I haven't tested out the VPN yet.
>>
>> I very dare you to!
>
> I've spent much of the last 2 days tracing and investigating much more
> interesting things with Snoms than trying out new features.
>
> For instance.
>
> 7.1.9 supports overlap dialling properly
> Snom 320 versions prior to 6.5.4 will not work on the latest batch of phones
> from Snom.
Not familiar with overlap dialing....
>> Ah, having never played with openVPN, does that mean it will only connect
>> to an openVPN host?
>
> Yes. But the software is freely downloadable and runs on windows or
> Gnu/linux really easily. Also gives you the option of running over TCP or
> UDP and in either layer2 bridge mode or routed IP mode.
>
> On the other hand, because of so much flexibility, configuration can be
> complex.
Yes, I noticed its complexity....
>> Incidentally, is the openVPN config tarball only for the 370?
>>
>> I can see myself ending up with a 370....!
>
> Yes. Only a Snom370 has enough Flash and RAM to run it.
>
> 370s are really nice in other ways too. The displays are really really nice.
> Back lit in blue, greyscale and a higher res than the 360.
I have to admin, they look a very nice piece of kit.
Jono wrote:
> After serious thinking Tim wrote :
>> Jono wrote:
>>>> I have a Snom370 here, but I haven't tested out the VPN yet.
>>>
>>> I very dare you to!
>>
>> I've spent much of the last 2 days tracing and investigating much more
>> interesting things with Snoms than trying out new features.
>>
>> For instance.
>>
>> 7.1.9 supports overlap dialling properly
>> Snom 320 versions prior to 6.5.4 will not work on the latest batch of
>> phones from Snom.
>
> Not familiar with overlap dialing....
>
[snip]
It means the phone sends each digit as you dial it, like an analogue or
ISDN line. Then the SIP server is supposed to connect the call as soon
as the number is meaningful. It means you don't have to press the tick
button to "send" the number once you've finished typing it in. I'm not
sure how well this works in Asterisk though, I need to do some testing.
Paul Hayes wrote:
> It means the phone sends each digit as you dial it, like an analogue or
> ISDN line. Then the SIP server is supposed to connect the call as soon
> as the number is meaningful. It means you don't have to press the tick
> button to "send" the number once you've finished typing it in. I'm not
> sure how well this works in Asterisk though, I need to do some testing.
>
It does work in Asterisk, but you need a very carefully planned dial plan.
You also need any ITSPs you use for outbound routes to also support
overlap dialling. Also it works on ISDN, but not on analogue lines.
The way it works on SIP servers is that the phone sends an INVITE after
a very quick timeout. After every digit or say after a 100ms timeout
since the last digit.
The SIP server will respond with 484 Address Incomplete if it doesn't
think there are enough digits.
Snom 370 & VPN 
Linear Mode
