We have a WS-12-250-AC that's powering three AF24 radios on the roof of a downtown apartment building. Last night, at 12:37am, all three radios went off line (and we lost remote access to our equipment in that building). When we got into the building this morning, the Netonix switch was running, there was a good data connection to the router but the ports for the three shielded cables to the radios were all blinking red.
Unplugging and re-plugging power to the Netonix switch fixed things, i.e. everything came back up and is now operating normally.
Cable tests show no problems on any connection.
Last night was overcast with occasional drizzles but no lighting, not even some heavy rain.
Probably unrelated but the log shows one of the three AF24 radios triggered a flow control event at 12:27 am.
3 ports go to blinking red at once
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sirhc - Employee
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Re: 3 ports go to blinking red at once
Sorry, no idea.
Would been nice had you plugged your laptop in and looked at log before rebooting.
A grounding question, the 3 AF radios on the roof, tell me you did not put in new ground rod(s) for their mounts that are not bonded to the service ground rods?
Even if you did not put in new ground rods just for AF radios on roof you could have ground current flowing from service to AFs on roof.
When you have temperature shift you get a negative charge in the atmosphere from static caused by air moving across air. Normally the positive charge is below the negative charge running along the surface of the Earth which is the condition when you see ground strikes. Sometimes the positive charge is above the negative charge which is the condition that occurs when you see heat lightening or lightening in the sky that does not come down to the ground.
Anyway if service grounds are poor and the AF radios are stuck up there in the negative charge you can get ground current going up the wire to get to the negative charge. This happens a lot at residential installs where the radio portion works fine but the Ethernet port is dead. When this happens our crews install a new ground rod on customer service bonding it to the old one and problem goes away.
Anyway ground current is current and if this was occurring that ground current would be counted as total current on the port Poly-fuses and could possibly cause them to trip.
Again had you logged into the switch with laptop via Ethernet or console and looked around maybe you could tell???
Also unplugging the radio then plugging it back in (I know this goes against what we say but in this even you knew the cable was good so no chance of short) this would allow the poly-fuse to reset and restore power.
Would been nice had you plugged your laptop in and looked at log before rebooting.
A grounding question, the 3 AF radios on the roof, tell me you did not put in new ground rod(s) for their mounts that are not bonded to the service ground rods?
Even if you did not put in new ground rods just for AF radios on roof you could have ground current flowing from service to AFs on roof.
When you have temperature shift you get a negative charge in the atmosphere from static caused by air moving across air. Normally the positive charge is below the negative charge running along the surface of the Earth which is the condition when you see ground strikes. Sometimes the positive charge is above the negative charge which is the condition that occurs when you see heat lightening or lightening in the sky that does not come down to the ground.
Anyway if service grounds are poor and the AF radios are stuck up there in the negative charge you can get ground current going up the wire to get to the negative charge. This happens a lot at residential installs where the radio portion works fine but the Ethernet port is dead. When this happens our crews install a new ground rod on customer service bonding it to the old one and problem goes away.
Anyway ground current is current and if this was occurring that ground current would be counted as total current on the port Poly-fuses and could possibly cause them to trip.
Again had you logged into the switch with laptop via Ethernet or console and looked around maybe you could tell???
Also unplugging the radio then plugging it back in (I know this goes against what we say but in this even you knew the cable was good so no chance of short) this would allow the poly-fuse to reset and restore power.
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sirhc - Employee
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Re: 3 ports go to blinking red at once
Sorry, no idea.
Would been nice had you plugged your laptop in and looked at log before rebooting.
A grounding question, the 3 AF radios on the roof, tell me you did not put in new ground rod(s) for their mounts that are not bonded to the service ground rods?
Even if you did not put in new ground rods just for AF radios on roof you could have ground current flowing from service to AFs on roof.
When you have temperature shift you get a negative charge in the atmosphere from static caused by air moving across air. Normally the positive charge is below the negative charge running along the surface of the Earth which is the condition when you see ground strikes. Sometimes the positive charge is above the negative charge which is the condition that occurs when you see heat lightening or lightening in the sky that does not come down to the ground.
Anyway if service grounds are poor and the AF radios are stuck up there in the negative charge you can get ground current going up the wire to get to the negative charge. This happens a lot at residential installs where the radio portion works fine but the Ethernet port is dead. When this happens our crews install a new ground rod on customer service bonding it to the old one and problem goes away.
Anyway ground current is current and if this was occurring that ground current would be counted as total current on the port Poly-fuses and could possibly cause them to trip.
Again had you logged into the switch with laptop via Ethernet or console and looked around maybe you could tell???
Also unplugging the radio then plugging it back in (I know this goes against what we say but in this even you knew the cable was good so no chance of short) this would allow the poly-fuse to reset and restore power.
Would been nice had you plugged your laptop in and looked at log before rebooting.
A grounding question, the 3 AF radios on the roof, tell me you did not put in new ground rod(s) for their mounts that are not bonded to the service ground rods?
Even if you did not put in new ground rods just for AF radios on roof you could have ground current flowing from service to AFs on roof.
When you have temperature shift you get a negative charge in the atmosphere from static caused by air moving across air. Normally the positive charge is below the negative charge running along the surface of the Earth which is the condition when you see ground strikes. Sometimes the positive charge is above the negative charge which is the condition that occurs when you see heat lightening or lightening in the sky that does not come down to the ground.
Anyway if service grounds are poor and the AF radios are stuck up there in the negative charge you can get ground current going up the wire to get to the negative charge. This happens a lot at residential installs where the radio portion works fine but the Ethernet port is dead. When this happens our crews install a new ground rod on customer service bonding it to the old one and problem goes away.
Anyway ground current is current and if this was occurring that ground current would be counted as total current on the port Poly-fuses and could possibly cause them to trip.
Again had you logged into the switch with laptop via Ethernet or console and looked around maybe you could tell???
Also unplugging the radio then plugging it back in (I know this goes against what we say but in this even you knew the cable was good so no chance of short) this would allow the poly-fuse to reset and restore power.
Support is handled on the Forums not in Emails and PMs.
Before you ask a question use the Search function to see it has been answered before.
To do an Advanced Search click the magnifying glass in the Search Box.
To upload pictures click the Upload attachment link below the BLUE SUBMIT BUTTON.
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To do an Advanced Search click the magnifying glass in the Search Box.
To upload pictures click the Upload attachment link below the BLUE SUBMIT BUTTON.
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Brough - Member
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Re: 3 ports go to blinking red at once
Sorry, I've never been to the building and the person who was closest at hand had no laptop.
The three AF24 radios are on two different mounts on the flat roof of a 28 story building that is over-shadowed by a 61 story building about 50-60 feet away.
There are no ground rods. There is a choice of bonding to the building frame, bonding to the lightning arrestor cabling (installed because our building was the tallest in the area until the 61 story building was constructed) and bonding to the electrical ground associated with outlets in the telecom closet on the 27th floor.
The switch is grounded to the electrical ground on the 27th floor.
I suspect the mounts are bonded to the lightning arrestor cables (because typically lightning arrestor installers insist on this) but I don't know.
I will make it a point to visit this roof as soon as possible to check.
The three AF24 radios are on two different mounts on the flat roof of a 28 story building that is over-shadowed by a 61 story building about 50-60 feet away.
There are no ground rods. There is a choice of bonding to the building frame, bonding to the lightning arrestor cabling (installed because our building was the tallest in the area until the 61 story building was constructed) and bonding to the electrical ground associated with outlets in the telecom closet on the 27th floor.
The switch is grounded to the electrical ground on the 27th floor.
I suspect the mounts are bonded to the lightning arrestor cables (because typically lightning arrestor installers insist on this) but I don't know.
I will make it a point to visit this roof as soon as possible to check.
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sirhc - Employee
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Re: 3 ports go to blinking red at once
Brough wrote:I suspect the mounts are bonded to the lightning arrestor cables (because typically lightning arrestor installers insist on this) but I don't know.
I will make it a point to visit this roof as soon as possible to check.
Yes this would be BAD as there are now two ground potentials BONDED via your Ethernet Cables.
Better to let the mounts FLOAT with no grounding except for the possible ESD drain wire coming from the switch.
Side note: My advice never hook up the AF24 ground lug as the radio will float in the plastic chassis. The AF24HD does not matter as the aluminum chassis bonds radio to mount by itself.
Even each floor or service panel within the same building will have a differnt ground potential due to the distance of the panels ground wire to the service rods. Never bond devices between 2 ground potentials with copper, this is where fiber comes in.
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Brough - Member
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Re: 3 ports go to blinking red at once
Yes, I prefer to use only the electrical ground at our equipment location (typically in an upper floor telecom closet or a mechanical room on or near the roof). However the folks installing and maintaining lightning arrestor systems have different views and, when this comes up (not too often), we are not in a position to argue.
Yes, we have several hundred AF24s with no connected ground lugs.
Yes, we have several hundred AF24s with no connected ground lugs.
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sirhc - Employee
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Re: 3 ports go to blinking red at once
Well in situations like this where they demand to connect a differnt ground potential to mounts;
- if they are AF24 originals then simply do not hook up ground lug.
- if AF24HD then go to hardware store and get rubber sheets and laminate the mounting pipe where the clamps are isolating the AF24HD from the mount and of course do not hook up ground lug.
- if they are AF24 originals then simply do not hook up ground lug.
- if AF24HD then go to hardware store and get rubber sheets and laminate the mounting pipe where the clamps are isolating the AF24HD from the mount and of course do not hook up ground lug.
Support is handled on the Forums not in Emails and PMs.
Before you ask a question use the Search function to see it has been answered before.
To do an Advanced Search click the magnifying glass in the Search Box.
To upload pictures click the Upload attachment link below the BLUE SUBMIT BUTTON.
Before you ask a question use the Search function to see it has been answered before.
To do an Advanced Search click the magnifying glass in the Search Box.
To upload pictures click the Upload attachment link below the BLUE SUBMIT BUTTON.
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