Obi110 plus SPA8000 as Poormans Analog PBX
stooba:
Haha, yes, thought of that as soon as I hit "Post". Did the test and found that the PHONE line DOES NOT fall back to the PSTN LINE jack as advertised. BOOO!
I plugged the LINE jack of the OBI110 into the CO jack on my wall, plugged an old analog phone into the PHONE jack, plugged in the OBI AC power cube, and heard a dial tone. Hung up the phone, disconnected the power, waited 3 seconds, picked up the phone and heard nothing. Problem confirmed!
For the first time since buying this device, I'm not at all happy with Obihai! What a dumb decision to remove this feature. Am going to take it apart now and see if it is just an "unpopulated" fail-back relay or if the circuit was actually revised to remove the device. I hope it's just unpopulated and Obihai will tell me the component specs so I can solder it in myself.
stooba:
The following is taken directly from the ObiAdminGuide:
Powerful Call Routing & Voice Service Features:
· SIP Support for Voice and Fax Over IP from Internet Telephony Service Providers
· OBiTALK Managed VoIP Network for OBi Endpoint Devices & Applications
· High Quality Voice Encoding Using G.711, G.726, G.729 Algorithms
· Recursive Digit Maps & Associated Call Routing (Outbound, Inbound)
· Service Continuity in Case of Power or Network Failure (Configurable)
I've gone through the web-admin screens three times and can not find where this Configurable feature is set.
RonR:
Quote from: stooba on April 05, 2012, 02:42:20 pm
I've gone through the web-admin screens three times and can not find where this Configurable feature is set.
That's always been in documentation, but there's nothing to configure. It was all based on a relay dropping out when the power failed, connecting the PHONE Port directly to the LINE Port -- until Obihai removed the relay.
stooba:
The good news is that the PCBs still have spaces for the missing relay (and associated components), the devices are just not populated.
Here is a link to a shared folder of pictures of the Obi110 PCB:
https://skydrive.live.com/redir.aspx?cid=e09e9b91a0c8f298&resid=E09E9B91A0C8F298!129&parid=E09E9B91A0C8F298!104&authkey=!AO953AL5VowTwN0
<< :-\Sorry if I'm doing this wrong or should have posted this folder in another thread....I'm new to forums>>
There is a picture showing the missing Relay (K1) along with Capacitor C99, Transistor Q206, and Diodes D203 & 204. There is another picture of the bottom of the board showing missing Diodes D150 and D151 (not sure yet if they are part of the relay circuit).
At first it looked like they made a mistake by overlapping the pads for D203 and D204, but now I'm not sure. There is a magnified photo which shows this clearly. It could be a PCB layout mistake - one that would make it difficult to populate both devices (which might be why they decided it was easier to drop the feature than rework the boards). Or it could be that the overlap was done intentionally because only one of the diodes is necessary and this layout would leave them flexible to specify a diode in either a SOT or a 0603 package. It's difficult to follow the tracks because it is a multi-layer PCB, but I will try again when I have more time. My best guess right now is that it's not a layout error and that only one diode needs to populated D203 or D204.
So where does all this leave us? Happy because the possibility exists to populate these components ourselves, but still frustrated because we need an Obihai designer to tell us what the missing components are.
QBZappy:
stooba,
Perhaps someone with an Obi that has a relay can take pictures and you can compare.
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