Incoming calls on pots line port not ringing through to the phone.
gary-gary:
Quote
I've had a poke around inside one of my OBi110s and the relay in question is:
http://uk.futureelectronics.com/en/technologies/electromechanical/relays/signal-relays/Pages/3310323-TX2-4.5V.aspx
Put one of these where the hole for relay K1 is shown on stooba's pictures and that's how it looks. As stooba points out, there are a few other questions regarding other components.
Great! Thanks for the links.
OK, so now the relay, K1 has been identified. Are you able to see any marking on the other parts, I may be able to identify them from the code and/or manufacturer's logo if imprinted.
The missing parts stooba noted are:
K1 - TX2-4.5V (Panasonic)
Q206 -
C99 -
D150 & D151 -
D203 or D204 -
Are all of these parts installed on the ver 2.8 pcb? Note that the footprints for D203/D204 overlap, so only one of these 2 parts will be installed. And R38 & R39 will not be installed on a unit with the relay.
I'll have to trace out the circuit a bit to see if the relay is controlled by the processor, or it may be simply hooked to the regulated supply.
One interesting item I observed from stooba's pictures... apparently the pcb has a spot to install a second RJ45 jack (JS1), interface chip (U8), and LED (D6). I wonder what function these items (and necessary firmware of course) perform?
-gary
ianobi:
I think Shale is on the right lines here:
http://www.obitalk.com/forum/index.php?topic=2923.msg40763#msg40763
It could be as simple as removing R38 and R39, then installing the relay.
I'm leaving my OBi in one piece for now - it's doing a job :)
Lavarock7:
Quote from: gary-gary on August 08, 2013, 05:43:41 am
Quote from: Lavarock7
Simple external relays could be used to switch the POTS line to the phones in the house to bypass the Obi if necessary and not have to open the Obi.
Lavarock7 - While an external relay would indeed work, it seems pointless when the OBi110 has the capability to be easily modified with just a few parts. Much cleaner. I'm already getting push back from my parents about all the hardware & cables for cable modem, router, OBi, network cables, switch, phone lines, computer cables, wall warts, etc... I don't want to add to this already horrendous mess! ;-)
Quote from: ianobi
I have two OBi110s both are Hardware Version 2.8. Both have the internal power fail relay. More info here:
http://www.obitalk.com/forum/index.php?topic=2872.msg18930#msg18930
ianobi - Thanks for the link. It seems stooba has already examined this and discovered it is just a matter of a few missing parts. This should be a real easy mod... I just need to identify the missing components. I don't suppose you'd be willing to pop open one of your ver 2.8 units and carefully photograph the PCB?
Are the units with the gray tops the ver 2.8 hardware?
-gary
I avoided the suggestion of adding parts inside the Obi because of warranty issues. It is a lot easier to work with external parts than to solder to a PC board (which might have been a multi-layered one. Also, an external relay is easier to find than a specific PC board mountable one.
Still, I have to wonder if the removal of the relay was strictly for cost, or were there issues like relay sticking or some FCC compliance issue that caused them to remove it.
ianobi:
Lavarock7,
I agree - I would use an external solution if I had the same problem. I would power the relay from the OBi power unit. A small plastic enclosure should house the relay and look tidy.
I doubt that we will ever know why Obihai removed the relay. It's difficult to judge its reliability as it operates and releases so rarely.
gary-gary:
Quote from: Lavarock7
I avoided the suggestion of adding parts inside the Obi because of warranty issues. It is a lot easier to work with external parts than to solder to a PC board (which might have been a multi-layered one. Also, an external relay is easier to find than a specific PC board mountable one.
Still, I have to wonder if the removal of the relay was strictly for cost, or were there issues like relay sticking or some FCC compliance issue that caused them to remove it.
I could understand warranty concerns on a $1000 item, but this is only $40-50... and besides my warranty has expired! ;)
Soldering is no problem... picked up my 1st iron in the 60's... been working with fine-pitch surface mount boards since they first appeared. Sounds like stooba and some others are just as capable.
I imagine cost was the issue for deleting the relay. It is a $3.65 part in single piece quantities, and drops to $1.98 in 10,000-piece quantities. Still a significant cost in a $40-50 retail item. Removal also decreases the power consumption by about 150 mW. I'm hoping they have not reduced the capacity of the power regulator circuitry since deleting the relay.
I see the 9/9/2010 OBi110 data sheet states:
"Service Continuity in Case of Power or Network Failure (Configurable)"
While the 11/12/2011 OBi110 data sheet says:
"Service Continuity in Case of Network Failure (Configurable)"
The March 2011 version of the OBi Device Administration Guide says:
"Physical FXS to FXO Relay - For Service Continuity in Case of Power Failure"
I wonder where this 'configurable' parameter is?? ???
-gary
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