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#1
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Gentner DH20 digital hybrid (telephone balance unit) not outputtingto phone line
Hi, I have a Gentner DH20 digital hybrid (aka telephone balance unit)
which isn't outputting to the phone line. I'm believe these models are now made by Comrex and are generally thought of as reliable! I have reset all the pots to mid-values and the DIP switches are all set to the defaults. I can use a POTS handset through the unit OK. According to the manual the "On" light on the DH20 is supposed to flash when the phone is ringing, which it doesn't do. Manually connecting the DH20 by pressing the "On" button disconnects the POTS handset as it is supposed to, although the switch does not respond quickly and seems to require some pressing to engage. Audio from the mixer flashes the "Send" and "Caller" LEDs. I'm not sure whether this is correct (although just the "Send" LED flashing would make more sense to me.) No audio is heard at the remote end of the phone line though, so it doesn't seem as if audio is being passed out to the phone line. Monitoring on the mixer when connecting the call, you can hear the line being connected to (a short couple of clicks, which seems to be characteristic of hybrids). Audio from the phone line doesn't register with the unit at all. When disconnecting, the DH20 refuses to hang up, requiring a hard power reset. When the power is pulled, the call is resumed on the POTS handset as it is supposed to be. It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? The only other thing I can think of is that the phone line also has an ADSL signal on it. There are known good microfilters in place however so this shouldn't be disrupting the signal that the DH20 receives. TIA, Tony |
#2
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Gentner DH20 digital hybrid (telephone balance unit) not outputting to phone line
Tony Whitmore wrote:
Hi, I have a Gentner DH20 digital hybrid (aka telephone balance unit) which isn't outputting to the phone line. I'm believe these models are now made by Comrex and are generally thought of as reliable! 1. Did it work before? 2. Is it set up for UK phone lines? Audio from the mixer flashes the "Send" and "Caller" LEDs. I'm not sure whether this is correct (although just the "Send" LED flashing would make more sense to me.) No audio is heard at the remote end of the phone line though, so it doesn't seem as if audio is being passed out to the phone line. Monitoring on the mixer when connecting the call, you can hear the line being connected to (a short couple of clicks, which seems to be characteristic of hybrids). Is it taking the phone off-hook at all? You hear the click, but is the hybrid drawing current off the line? Audio from the phone line doesn't register with the unit at all. When disconnecting, the DH20 refuses to hang up, requiring a hard power reset. When the power is pulled, the call is resumed on the POTS handset as it is supposed to be. It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? Could be all kinds of stuff including the line protection circuitry on the front end. ClearOne or CircuitWerkes should be able to get you a schematic for the thing. If it's intended for US lines, common mode ringing on UK phone lines can blow the line protection stuff on some equipment. If you want repair in the US, I would suggest CircuitWerkes. The only other thing I can think of is that the phone line also has an ADSL signal on it. There are known good microfilters in place however so this shouldn't be disrupting the signal that the DH20 receives. This will just cause some noise. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Hi Scott,
On Mar 27, 1:23*pm, (Scott Dorsey) wrote: 1. Did it work before? Its a second hand unit, which was believed to have been working at the time I got my hands on it. However, it has been in storage for a while and this is the first time I've tried to get it up and running. 2. Is it set up for UK phone lines? The unit was originally purchased in the UK and the manual says it's compatible with UK standards. Audio from the mixer flashes the "Send" and "Caller" LEDs. I'm not sure whether this is correct (although just the "Send" LED flashing would make more sense to me.) No audio is heard at the remote end of the phone line though, so it doesn't seem as if audio is being passed out to the phone line. Monitoring on the mixer when connecting the call, you can hear the line being connected to (a short couple of clicks, which seems to be characteristic of hybrids). Is it taking the phone off-hook at all? *You hear the click, but is the hybrid drawing current off the line? I'm not sure how to tell if it is drawing current off the line. It certainly interrupts a call in progress and maintains the connection when "On". It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? Could be all kinds of stuff including the line protection circuitry on the front end. *ClearOne or CircuitWerkes should be able to get you a schematic for the thing. There are some schematics in the manual, but it doesn't help me much not being an electronic engineer. I've taken the lid off and there are no visibly damaged components, no burnt-out chips etc. Thanks, Tony |
#4
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Tony Whitmore wrote:
Hi Scott, On Mar 27, 1:23=A0pm, (Scott Dorsey) wrote: 1. Did it work before? Its a second hand unit, which was believed to have been working at the time I got my hands on it. However, it has been in storage for a while and this is the first time I've tried to get it up and running. Okay, clean the hookswitch relay, before doing anything else. If it used to work, and it has been in storage a long time and doesn't work, contact corrosion is the first thing to worry about. I'm not sure how to tell if it is drawing current off the line. It certainly interrupts a call in progress and maintains the connection when "On". If you can call someone, hang up the phone, pick it back up and they are still there, then it's drawing current off the line and taking the line off-hook. It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? Could be all kinds of stuff including the line protection circuitry on the front end. =A0ClearOne or CircuitWerkes should be able to get you a schematic for the thing. There are some schematics in the manual, but it doesn't help me much not being an electronic engineer. I've taken the lid off and there are no visibly damaged components, no burnt-out chips etc. Call your local broadcast tech! --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#5
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Hi Scott,
On Mar 27, 2:41*pm, (Scott Dorsey) wrote: Tony Whitmore wrote: Its a second hand unit, which was believed to have been working at the time I got my hands on it. However, it has been in storage for a while and this is the first time I've tried to get it up and running. Okay, clean the hookswitch relay, before doing anything else. *If it used to work, and it has been in storage a long time and doesn't work, contact corrosion is the first thing to worry about. I'm quite experienced with a bottle of contact cleaner! I'll clean the various socket contacts, although the inside of the unit looked pristine when I opened it. I'm not sure how to tell if it is drawing current off the line. It certainly interrupts a call in progress and maintains the connection when "On". If you can call someone, hang up the phone, pick it back up and they are still there, then it's drawing current off the line and taking the line off-hook. I'll test this ASAP. There are some schematics in the manual, but it doesn't help me much not being an electronic engineer. I've taken the lid off and there are no visibly damaged components, no burnt-out chips etc. Call your local broadcast tech! I don't have one, hence looking for recommendations for one! Thanks, Tony |
#6
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On Mar 27, 10:56*am, Tony Whitmore wrote:
Hi Scott, On Mar 27, 2:41*pm, (Scott Dorsey) wrote: Tony Whitmore wrote: Its a second hand unit, which was believed to have been working at the time I got my hands on it. However, it has been in storage for a while and this is the first time I've tried to get it up and running. Okay, clean the hookswitch relay, before doing anything else. *If it used to work, and it has been in storage a long time and doesn't work, contact corrosion is the first thing to worry about. I'm quite experienced with a bottle of contact cleaner! I'll clean the various socket contacts, although the inside of the unit looked pristine when I opened it. I'm not sure how to tell if it is drawing current off the line. It certainly interrupts a call in progress and maintains the connection when "On". If you can call someone, hang up the phone, pick it back up and they are still there, then it's drawing current off the line and taking the line off-hook. I'll test this ASAP. There are some schematics in the manual, but it doesn't help me much not being an electronic engineer. I've taken the lid off and there are no visibly damaged components, no burnt-out chips etc. Call your local broadcast tech! I don't have one, hence looking for recommendations for one! Thanks, Tony does it matter if the red and green may be reversed? some phone gadgets don't like that, some don't care... Mark |
#7
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On Mar 27, 4:35*am, Tony Whitmore wrote:
Hi, I have a Gentner DH20 digital hybrid (aka telephone balance unit) which isn't outputting to the phone line. I'm believe these models are now made by Comrex and are generally thought of as reliable! I have reset all the pots to mid-values and the DIP switches are all set to the defaults. I can use a POTS handset through the unit OK. According to the manual the "On" light on the DH20 is supposed to flash when the phone is ringing, which it doesn't do. Manually connecting the DH20 by pressing the "On" button disconnects the POTS handset as it is supposed to, although the switch does not respond quickly and seems to require some pressing to engage. Audio from the mixer flashes the "Send" and "Caller" LEDs. I'm not sure whether this is correct (although just the "Send" LED flashing would make more sense to me.) No audio is heard at the remote end of the phone line though, so it doesn't seem as if audio is being passed out to the phone line. Monitoring on the mixer when connecting the call, you can hear the line being connected to (a short couple of clicks, which seems to be characteristic of hybrids). Audio from the phone line doesn't register with the unit at all. When disconnecting, the DH20 refuses to hang up, requiring a hard power reset. When the power is pulled, the call is resumed on the POTS handset as it is supposed to be. It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? The only other thing I can think of is that the phone line also has an ADSL signal on it. There are known good microfilters in place however so this shouldn't be disrupting the signal that the DH20 receives. TIA, Tony You don't mention what is FEEDING the DH20, to cause audio to travel back down the phone line to the caller. Normally, a mix-minus (everything but the phone itself) is fed from a mixer to the DH20. This is what the caller hears. So you have to set a send level on the mixer, both individual channels and a sub/aux master, and also insure that the DH20's input level is set correctly. Are you by any chance expecting the POTS hanset to feed back down the line? It won't. |
#8
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Hi Mark,
On Mar 27, 3:43*pm, wrote: does it matter if the red and green may be reversed? some phone gadgets don't like that, some don't care... Red and green being the two cores on the phone line? (Excluding the bell wire, I guess.) I think they're blue and white in the case of this particular socket! Tony |
#9
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Hi blackburst,
On Mar 27, 3:44*pm, blackburst wrote: On Mar 27, 4:35*am, Tony Whitmore wrote: Audio from the mixer flashes the "Send" and "Caller" LEDs. I'm not sure whether this is correct (although just the "Send" LED flashing would make more sense to me.) No audio is heard at the remote end of the phone line though, so it doesn't seem as if audio is being passed out to the phone line. Monitoring on the mixer when connecting the call, you can hear the line being connected to (a short couple of clicks, which seems to be characteristic of hybrids). Audio from the phone line doesn't register with the unit at all. When disconnecting, the DH20 refuses to hang up, requiring a hard power reset. When the power is pulled, the call is resumed on the POTS handset as it is supposed to be. It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? The only other thing I can think of is that the phone line also has an ADSL signal on it. There are known good microfilters in place however so this shouldn't be disrupting the signal that the DH20 receives. TIA, Tony You don't mention what is FEEDING the DH20, to cause audio to travel back down the phone line to the caller. Normally, a mix-minus (everything but the phone itself) is fed from a mixer to the DH20. This is what the caller hears. I mention the audio set up above, but to clarify: A microphone is connected to the mixer. An aux output with this microphone channel present is connected to the SEND socket of the DH20. This is what should be sent out down the phone line. The cables are known good and the "signal present" LEDs flash on the DH20 when the microphone is spoken into. The output of the DH20 is connected to the input of another channel. Both these channels are then monitored via cans. The signal from the DH20 is *not* fed into the aux output. So this very simple set up creates a mix-minus via the use of the aux output. So you have to set a send level on the mixer, both individual channels and a sub/aux master, and also insure that the DH20's input level is set correctly. The signal from the microphone/mixer is good and registers well on the "signal present" LEDs. The input potentiometers are set to mid values. Are you by any chance expecting the POTS hanset to feed back down the line? It won't. No, I'm not expecting that. All I'm trying to do is get the aux output sent down the line and the voice from the other end of the line fed back into the mixer. Thanks, Tony |
#10
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On Mar 27, 12:03*pm, Tony Whitmore wrote:
Hi Mark, On Mar 27, 3:43*pm, wrote: does it matter if the red and green may be reversed? some phone gadgets don't like that, some don't care... Red and green being the two cores on the phone line? (Excluding the bell wire, I guess.) I think they're blue and white in the case of this particular socket! Tony yes that is what I mean...you might try reversing them Mark |
#11
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On Mar 27, 12:14 pm, Tony Whitmore wrote:
Hi blackburst, On Mar 27, 3:44 pm, blackburst wrote: On Mar 27, 4:35 am, Tony Whitmore wrote: Audio from the mixer flashes the "Send" and "Caller" LEDs. I'm not sure whether this is correct (although just the "Send" LED flashing would make more sense to me.) No audio is heard at the remote end of the phone line though, so it doesn't seem as if audio is being passed out to the phone line. Monitoring on the mixer when connecting the call, you can hear the line being connected to (a short couple of clicks, which seems to be characteristic of hybrids). Audio from the phone line doesn't register with the unit at all. When disconnecting, the DH20 refuses to hang up, requiring a hard power reset. When the power is pulled, the call is resumed on the POTS handset as it is supposed to be. It seems likely that there's a fault with the circuitry which sends the signal to/from the phone line, and possibly the switching panel. My question is whether any one else has had similar problems and found a solution. If the solution is a repair place, can anyone recommend one? The only other thing I can think of is that the phone line also has an ADSL signal on it. There are known good microfilters in place however so this shouldn't be disrupting the signal that the DH20 receives. TIA, Tony You don't mention what is FEEDING the DH20, to cause audio to travel back down the phone line to the caller. Normally, a mix-minus (everything but the phone itself) is fed from a mixer to the DH20. This is what the caller hears. I mention the audio set up above, but to clarify: A microphone is connected to the mixer. An aux output with this microphone channel present is connected to the SEND socket of the DH20. This is what should be sent out down the phone line. The cables are known good and the "signal present" LEDs flash on the DH20 when the microphone is spoken into. The output of the DH20 is connected to the input of another channel. Both these channels are then monitored via cans. The signal from the DH20 is *not* fed into the aux output. So this very simple set up creates a mix-minus via the use of the aux output. So you have to set a send level on the mixer, both individual channels and a sub/aux master, and also insure that the DH20's input level is set correctly. The signal from the microphone/mixer is good and registers well on the "signal present" LEDs. The input potentiometers are set to mid values. Are you by any chance expecting the POTS hanset to feed back down the line? It won't. No, I'm not expecting that. All I'm trying to do is get the aux output sent down the line and the voice from the other end of the line fed back into the mixer. OK Tony, when you say "all the dip switches are set to defaults" what does that mean exactly? What about the dip switches behind the front panel? When you say it works with a POTS line, you mean you can call both out and in and have a conversation off air? When the phone rings, you have tried pressing the "on" button on the front panel, then trying to talk to the caller through the console from a studio mic? And are you also trying to hang up from the DH20's front panel? When you say it will not drop a call, do you mean when the caller hangs up it is stuck with line seized, or will it drop the call when the caller hangs up? Your lack of specificity makes me wonder how you are operating the unit, and what your dip switch settings are. But if it's not an operational issue, to troubleshoot no audio on the "Caller Out" give a listen to the DH20's "aux output": The aux out should provide you either a mix or just caller audio depending, but you must have the automatic Mix Minus function disabled. Make sure that's disabled. Also try listening to the "monitor out" with a speaker or headphones. The "Caller Out" is an XLR output and if someone plugged it into a console mic input with 48 volts active it is possible that the output is blown, maybe. If the other ports work, you can use the Aux out instead and have your maintenance guy fix the XLR outs later. Also make sure the phone lines you are using are supplying power and are not "Dry lines". The unit won't work with dry lines. If you need support, Comrex owns the rights to the DH20. Personally I'd much rather use a "Telos One". Will Miho NY TV/Audio Post/Music/Live Sound Guy "The large print giveth and the small print taketh away..." Tom Waits |
#12
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Hi Tim,
On 28 Mar, 21:42, "Tim Perry" wrote: Check fuse F2 inside the unit. This *connects the tel line to the ring detect circuit. Fuse F2 doesn't exist, but I think that's only supposed to be present in the DH22, the two line version of the unit. I have the DH20, and F1 is the only fuse I can see on the PCB: http://tonywhitmore.co.uk/misc/SP_A0204.jpg http://tonywhitmore.co.uk/misc/SP_A0206.jpg The F1 fuse is OK, passes a continuity check from a multimeter. Inspect circuit board for burnt parts or traced and repair as needed. No burnt or damaged parts that I can see. Whole thing looks nice and clean. |
#13
Posted to rec.audio.pro
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On 27 Mar, 15:56, Tony Whitmore wrote:
If you can call someone, hang up the phone, pick it back up and they are still there, then it's drawing current off the line and taking the line off-hook. I'll test this ASAP. I tested it and the DH20 does seem to be "off-hooking". |
#14
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
Hi Will,
On 28 Mar, 19:56, WillStG wrote: * * OK Tony, when you say "all the dip switches are set to defaults" what does that mean exactly? *What about the dip switches behind the front panel? I'm referring to the dip switches behind the front panel. They seem to be the only ones on the unit (certainly the only ones detailed in the manual). * When you say it works with a POTS line, you mean you can call both out and in and have a conversation off air? Yes, the POTS handset connected to the "set" jack works fine. I can make and receive calls and I can hold conversations using the POTS handset. * *When the phone rings, you have tried pressing the "on" button on the front panel, then trying to talk to the caller through the console from a studio mic? That's exactly the setup I've got and that I can't get working. All autoanswer detection is turned off. According to the manual the "on" light is supposed to flash when the line rings, but this does not happen. If I press (and hold!) the "on" button when someone is ringing the line, the DH20 picks up the line (off-hooks) but there's no audio to/from the line. *And are you also trying to hang up from the DH20's front panel? * Yes, using the "Off" button. When you say it will not drop a call, do you mean when the caller hangs up it is stuck with line seized, or will it drop the call when the caller hangs up? The remote caller's line does not stay "seized" if the remote caller hangs up on a connection to my DH20, at least in my tests. However the unit's "on" light stays lit, even when pressing and holding the "off" button. The local POTS handset (studio handset) is not able to access the line, so the local line is "seized". Anyone else trying to call the local line when the unit is in this condition receives a "busy" tone. *Your lack of specificity makes me wonder how you are operating the unit, and what your dip switch settings are. Just to repeat, all the dip switches are set to "off". All automatic answer settings, automatic mix-minus settings etc. are disabled. I am manually pressing the "on" and "off" buttons as necessary. I'm going for the simplest possible set up. Mic-Mixer-Aux output - DH20 - phone line. And back again: Phone line - DH20 - mixer channel - Main output & Monitors. Basically the simplest example given in the manual. * * But if it's not an operational issue, to troubleshoot no audio on the "Caller Out" give a listen to the DH20's "aux output": *The aux out should provide you either a mix or just caller audio depending, but you must have the automatic Mix Minus function disabled. *Make sure that's disabled. Automatic mix-minus is definitely disabled. There's no output from the aux output either, when testing a remote caller, unit showing "on". *Also try listening to the "monitor out" *with a speaker or headphones. Nothing on the monitor output with a remote caller, unit "on" either. Tested with headphones. *The "Caller Out" is an XLR output and if someone plugged it into a console mic input with 48 volts active it is possible that the output is blown, maybe. *If the other ports work, you can use the Aux out instead and have your maintenance guy fix the XLR outs later. There's no output on any of the ports, so it doesn't look like any one output is faulty. * * Also make sure the phone lines you are using are supplying power and are not "Dry lines". "Dry lines" seems to be a US term, but the line currently connected to this DH20 is a normal UK POTS line (analogue, copper). It supplies power to devices with a REN of up to 4. (I have tried another line and got the same results as with this line.) *The unit won't work with dry lines. *If you need support, Comrex owns the rights to the DH20. The unit is out of warranty, but I have found a couple of Comrex resellers here in the UK. I'm not familiar with any of the companies, so I'd welcome recommendations from members of this newsgroup for UK- based Comrex repair agents. *Personally I'd much rather use a "Telos One". If you have one spare you would like to send me, that would be great. Thanks for your thoughts! Tony |
#15
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On Mar 29, 12:49 pm, Tony Whitmore wrote:
The unit is out of warranty, but I have found a couple of Comrex resellers here in the UK. I'm not familiar with any of the companies, so I'd welcome recommendations from members of this newsgroup for UK- based Comrex repair agents. Well Tony, sounds like you have it covered. The UK distributor for COMREX is Vortex Communications http://www.vtx.co.uk Tel: 44 (0)20 8579 2743 Fax: 44 (0)20 8840 0018 In the US, even out of warranty, COMREX says they offer "free upgrades and evaluations of current products." The DH20 is mentioned on the same page as a current product, they purchased the "product and support" from Gentner. http://www.comrex.com/support/technotes/tn231.htm Here they are pretty good about talking you through a problem on the phone, so you might call US support if your UK distributor won't help you. They also say if you have a serial number they may have a repair log on a unit; some gear for example damaged by lightning strikes get flagged as "unrepairable". As for the line not dropping, disconnect the phone line when latched and see what happens. If the line drops at least that part of the problem is likely with the phone lines (the phone company loop drop being too short for the DH20 to recognize it), if not the problem is definitely with the unit. I might try flipping the dip switches around and see what happens as well. Hey, maybe up and down are reversed or something. And of course, plug and unplug the power a few times, reseat any connectors, the usual maintenance first line of repairs stuff. Best, Will Miho NY TV/Audio Post/Music/Live Sound Guy "The large print giveth and the small print taketh away..." Tom Waits "The large |
#16
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
On Mar 30, 8:49*pm, WillStG wrote:
On Mar 29, 12:49 pm, Tony Whitmore wrote: * *Well Tony, sounds like you have it covered. The UK distributor for COMREX is Vortex Communicationshttp://www.vtx.co.uk Tel: 44 (0)20 8579 2743 Fax: 44 (0)20 8840 0018 Yes, I rather thought it was headed towards a repair bill! * *As for the line not dropping, disconnect the phone line when latched and see what happens. *If the line drops at least that part of the problem is likely with the phone lines (the phone company loop drop being too short for the DH20 to recognize it), if not the problem is definitely with the unit. * *I might try flipping the dip switches around and see what happens as well. * Hey, maybe up and down are reversed or something. *And of course, plug and unplug the power a few times, reseat any connectors, the usual maintenance first line of repairs stuff. Hadn't tried pulling the phone line whilst the unit is "on" or randomly flipping dip switches yet. I will post back as/when I have some more info. Tony |
#17
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I have a Gentner DH20 Digital Hybird. I get an echo on the line through my mixer. Any suggestions?
Thanks Rob cwonradio |
#18
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
hi i have gentner dh20 can you please help when i try to put on air the caller the on air button doesnt work.. when i press it it on for a second then turn back to off but the line is ok, i think its on the gentner please help thanks...
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#19
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Gentner DH20 digital hybrid (telephone balance unit) notoutputting to phone line
wrote:
hi i have gentner dh20 can you please help when i try to put on air the caller the on air button doesnt work.. when i press it it on for a second then turn back to off but the line is ok, i think its on the gentner please help thanks... So, if you pick up the line from the board with no caller there, do you get a dial tone? If you have a telephone plugged into the line and you pick it up and listen, then you bring the caller on with the gentner, do you hear it click? If you disconnect the gentner from the board and just plug in headphones to the console in, then short the remote control pins to make it go off-hook, does it go off-hook? Was it working before and somebody played with the dip switches by any chance? There is a lot more to go wrong with the DH20 than with a conventional analogue hybrid. But there is also a lot more configuration stuff required too. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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