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Okay, this post is to 'clean up' and bring to a close this thread. I've been involved since post 39, when the thread became involved in an issue tangential to the initial one. Thanks to sparkymarka, I was able to isolate the problem with the BPT system (described in post 41) to a wire going...

I did what you said, Sparkymarka, and it buzzed. Unfortunately, no spare cores at the entry panel!

Yep, it buzzed. So the handset is ok. I then connected 7 on the handset to the wire coming in from the buzzer switch [ie I wired the handset exactly the way it was wired before, but with a new set of (short) wires], and pressed the buzzer switch - nothing happened. Which means (I presume) that...

Okay, I've done a bit of testing: At the receiver unit in the hallway, terminal 7 has a resting voltage of zero volts, which increases to 5.5 V when the buzzer is pressed. (This is exactly the same behaviour that it exhibited before this problem started, other than the fact that there is no...

I already tried changing the handset - the original one on the wall when this problem arose was an AS C-200, and I changed it over the weekend to the Agata C-200UK, but I have the same problem. Which is the ring wire, and how would I test for damage to it? Thanks in advance.

I see. okay, so what implications does that have for the following problem? : I have a BPT audio intercom system which comprises: one Agata C-200UK receiver unit (in the hallway), one A/200N controller unit (in the garage), and one HA/200 audio module (at the gate). It worked with no problems...

Sparkmarka, what does it mean that a buzzer is "tone-generated"? ratten

Hi, I thought I would bring this thread to a close by saying: 1) I bought a new HA200 unit and fitted it this weekend. Initially there was a problem with some very loud audio feedback, which was brought under control by reducing the potentiometer for "receiver volume control", but now it is...

You're a star, sparkymarka. Thanks very much for your help.

It's just 6 wire cable with no shielding - not coax, not twisted pair. No matter - I'll stick with the audio only. Is £40 about right for a new HA/200?

Yeah, I checked the speaker resistance and it's reading "over the range", so I suppose it's blown. I've seen a new HA/200 on the net for £40 (see picture), which I'm willing to buy, but I'm wondering whether this is the time to upgrade to a video intercom.... BUT, I would only do this if I...

The picture you requested: HA/200 inside a Targha entry panel.

You nailed it, sparkymarka! Not only is there no voice audio coming from the entry panel, but you can't hear the buzzer when the button is pressed. So it's very likely that the problem is at the entry panel side, not the receiver unit. Do you still think I should measure the speaker impedance...

I've just worked out what you meant - when you press the buzzer at the entry panel, can you hear it AT THE ENTRY PANEL itself? Pure genius! That just hadn't occurred to me at all. Will try it when I get back from work.

I don't think we have that in our system - there are only 2 buttons: the top one opens the gate, the bottom one (the auxiliary) doesn't do anything. As far as I know the only audio that ever went from the receiving unit to the entry panel was voice audio (which is what has stopped working now).

Ok, I'll try that after work tomorrow. Thanks.

Well, at the moment, its a BPT AS C-200, but I'm trying to troubleshoot a problem with it at the moment (see another thread), and if it turns out I can't rectify that problem, I will change it to a BPT Agata C-200.

Jumping, did you get this working? I'm interested in doing something similar myself (ie have a relay alert me that the buzzer has sounded, even if I am away from home), so I'm keen to hear your ideas.

Hi, I hope you can help me with some trouble-shooting advice regarding a BPT intercom system. It comprises: one AS C-200 receiver unit (in the hallway), one A/200N controller unit (in the garage), and one HA/200 audio module (at the gate). It is wired exactly according to the diagram on page...