The scenario is that you are using one of our ProTalk Door Entry SIP phones with a Gradwell account and forwarding the call to a mobile phone. You might want to do this to talk to people at your door when really, you aren't in or for when you aren't near a desk phone in your place of work.
If you still want to operate the relays in the door phone (either to activate a door opener, turn on a light etc...) then you type in a certain sequence on the phone you are using. This sequence is transmitted back to the door phone using what is known as DTMF tones. In order for this to work with Gradwell accounts we've found that you need to use their Outbound Proxy.
Firstly, make sure you are on a recent firmware (v1.48 at the time of writing), you can get this from ProVu if you need to upgrade. Then set the device up as follows in the SIP Parameters page:
- SIP Proxy Server Address - nat.gradwell.net
- SIP Proxy Server Port - 5082
- SIP Registrar Server Address - sip.gradwell.net
- SIP Registrar Server Port - 5060
Then your username/password as Gradwell will have given you.
This may also be the case for other providers as well as Gradwell, so if you are getting one-way-audio problems or DTMF problems in general, ask them about Outbound Proxy.
I'm being asked which is better, SARK or SnomONE a lot at the moment. Rather than a Harry Hill style fight, I'd thought up a quick comparison list. I don't believe either system is "better" than the other, they have their own advantages which work in certain scenarios. Horses for courses...
Advantages of SnomONE over SARK:
- 10 user version free and downloadable.
- Windows, Linux & Mac versions (nice easy installers for each although I'm yet to try the Mac version as I don't have a Mac).
- software only (some people see this as an advantage)
- PnP snom phone config (even slicker than Adopt in SARK)
Advantages of SARK over SnomONE:
- complete solution inc hardware (some people see this as an advantage)
- supports any SIP/IAX etc... end point (snomone is basically snom phones only apart from the odd one or two periphery devices)
- extensible : you can write your own Asterisk code and modify existing code.
- 100s if not 1000s of 3rd party bits of software support Asterisk to do all sorts of things. Including call centre reporting, operator panels, call billing etc...etc...
- choice of telephony interfaces for connecting to ISDN lines.
- custom code gives options for much more complicated call routing scenarios.
That's all I can think of right now, this isn't an exhaustive list :)
Advantages of SnomONE over SARK:
- 10 user version free and downloadable.
- Windows, Linux & Mac versions (nice easy installers for each although I'm yet to try the Mac version as I don't have a Mac).
- software only (some people see this as an advantage)
- PnP snom phone config (even slicker than Adopt in SARK)
Advantages of SARK over SnomONE:
- complete solution inc hardware (some people see this as an advantage)
- supports any SIP/IAX etc... end point (snomone is basically snom phones only apart from the odd one or two periphery devices)
- extensible : you can write your own Asterisk code and modify existing code.
- 100s if not 1000s of 3rd party bits of software support Asterisk to do all sorts of things. Including call centre reporting, operator panels, call billing etc...etc...
- choice of telephony interfaces for connecting to ISDN lines.
- custom code gives options for much more complicated call routing scenarios.
That's all I can think of right now, this isn't an exhaustive list :)
