for the callback you need to trigger it. In order to trigger it you phone that triggers the callback needs to have caller id.
what might also work if no caller id so when calling the did number it will always trigger the callback. anyone else calling this number will also trigger the callback so you would have to use that number only for callback and don't pass this on.
The soho that has 1 callback number should also work.
I carry 2 phones with me. I roaming free and 1 prepaid. The prepaid will trigger the callback.
Yes you can trigger a callback online using pbxes. You can also set the callbacknumber online. To prevent misuse you will need to setup callthru and pincode.
I would also advice to use a number for the trunk, example 32 than 0045xxx so instead of filling in 00 country code number add 32 before it. This way even when someone does find your online link it's more difficult to misuse it. In the outbound dial rules you can than have the 32 removed when dialing.
Below is how to setup this (is also on the pbxes forum)
go to inbound routing / addd incoming route
under trunk use your: username-callback (instead of callback you can also use another name)
click on callthru pin and set a pin number (choose carefull as an easy number can be misuded, I suggest 4 to 8 numbers)
Go to extensions:
add a new extension
set url (new feature) choose your name you want to use for pbxes.org/yourname
save and go back to the extension
change device options dial:
and replace by SIP/username-callback@pbxes.com (if you choose another name instead of callback please use that)
What this does is very simple.
You go to the webpage pbxes.org/yourname
fill in the number you want to be called back on.
pbxes will call you on the number and forward you to the extension. The extensions calls
username-callback@pbxes.org and you are asked for a pin number.
type the pin number and you get the dialtone of the pbx.
This way when in a hotel having a room that has it's own tel number and webacces you can trigger a callback to that number.
You can trigger a callback to any number using the webbase url.
Visiting a friend and want to make a call, no problem just use the webbased callback and you will pay for the cost.
But please be aware that anyone who has your pin number and webadress can use the callback. Therefore use a long pin to prevent misuse.