OBi110 and Intercom
QBZappy:
ianst,
If you plan on starting over, I would suggest that you try using the fewest incompatible technologies as possible. If you want to use the OBi, a "pure" sip end to end solution would make it easier to accomplish what you are trying to do. Read this thread for an idea of how it can be done. If you decide to use a sip enabled product like the Grandstream product suggested in this thread, you get the added benefit of being able to see who is at the door since it is a sip enabled camera with the ability to control an electric door strike.
"Buzzing" in by digit press, Intercom
http://www.obitalk.com/forum/index.php?topic=2666.0
ianobi:
Ian,
Here’s a slightly messy idea using some of the parts you already have!
Look at it the other way around. Replace the gate phone with a standard weatherproof / vandal resistant phone. Using one pair of the cat5e cable, link that phone to the OBi110 Phone Port.
The OBi Phone Port can be configured as a “hot line”. When the gate phone is picked up the OBi can be configured to dial any number out of the PSTN Line Port and/or a sip phone or softphone etc. Direct calling to an ip address on the same subnet of your router is fairly easy.
You would have to keep the transformer / gate latch etc and just use simple push buttons to open the gate.
This depends on how you wish to use your OBi – you would be losing the Phone Port to the outside gate.
If a sip phone is involved it would need to be configurable to “call without registration”.
Anyhow, I’m just throwing a few ideas into the mix. You could try it all out using a standard phone plugged into the Phone Port before committing to fitting a weatherproof phone on the gate.
ianst:
Hi both - thanks for the replies.
QB - that looks like a very good solution - I'll have to see how easily I can source it with a waterproof enclosure. Also I'd need to work out how people initially contact us to let us know they are there waiting! The gate is at the end of the drive which is about 100m long - not massive but long enough it's not always visible! Presumably a SIP call alert based on motion in a very specific area could do it? Mobile phone signal where we are is almost non existent so can't rely on that (plus some delivery drivers don't have mobiles)
IanObi - Great idea - just need to try and source a weatherproof phone for a reasonable price. Quick Google suggests 500 GBP! I've already got an Asterisk SIP server up and working on my LAN which the Obi/SIP handsets/iPhones are registered to.
Cheers
Ian
QBZappy:
Quote from: ianst on August 14, 2013, 02:26:59 pm
Presumably a SIP call alert based on motion in a very specific area could do it? Mobile phone signal where we are is almost non existent so can't rely on that (plus some delivery drivers don't have mobiles)
I wouldn't trust motion detection. In my experience it is not reliable. You could use a cheap buzzer to ring inside the house to notify you that someone is at the gate. The cam is equipped with internal speaker and mic and can be powered over the cat cable or with a wall wart. Connect it to your router using a network cable.
Good luck.
ianst:
Thanks QB - looks like a great piece of kit. :)
I think I might have to change plan and go for a SIP end to end solution with a fully SIP compliant intercom device unless I can get a weatherproof PSTN handset as IanOBI suggests for the Obi110.
Our house isn't massive but it is big enough that I think a buzzer handset at one side probably won't be heard the other side, which is why I've started off down the SIP/OBI route! Plus also going the SIP route gives me far more flexibility for routing calls across the Internet.
We've got 5 DECT/SIP cordless phones placed around the house, plus 2 iPhones and iPad which are always nearby, which seemed to me to be the obvious choice for the gate intercom to 'patch' through to. It's getting the link in the middle that's proving difficulty without spending large amounts!
Thanks for all your suggestions so far - I'm sure I'll work out a reasonable solution eventually! ;)
The obvious answer is more than one regular intercom handset for coverage, but that's nowhere nearly geeky enough for me :D
Cheers
Ian
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