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OT LAN speed
Off topic.
Hi all, In our home LAN, connected one switch to the other by a 30 m long CAT5E cable. The cable was there already, but I made new connectors to both ends, as the cable was longer than necessary. To my surprise I found at the switch that only 1 LED was blinking, indicating that it was a 100 Mbps connection. All other connectors show 2 LED's, which means it is a Gbps connection. I made a test. From my pc (W10) via a switch to the server (W10): 201/512 Mbps (W/R). From another pc (W7), via the 2 switches and the 30m cable to the server, 73/92 Mbps (W/R). Why is this connection so low? I tried several times to mount new connectors to both ends of that cable, but it did not improve anything. So the cable should be allright. Or should I place a CAT6 cable? Curious as to what peaople here think about this. Fokke |
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#2
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OT LAN speed
Fokke Nauta wrote:
Off topic. Hi all, In our home LAN, connected one switch to the other by a 30 m long CAT5E cable. The cable was there already, but I made new connectors to both ends, as the cable was longer than necessary. To my surprise I found at the switch that only 1 LED was blinking, indicating that it was a 100 Mbps connection. All other connectors show 2 LED's, which means it is a Gbps connection. I made a test. From my pc (W10) via a switch to the server (W10): 201/512 Mbps (W/R). From another pc (W7), via the 2 switches and the 30m cable to the server, 73/92 Mbps (W/R). Why is this connection so low? I tried several times to mount new connectors to both ends of that cable, but it did not improve anything. So the cable should be allright. Or should I place a CAT6 cable? Curious as to what peaople here think about this. Fokke Do you have a Marvell NIC on one of your computers, that has the Virtual Cable Tester ? https://web.archive.org/web/20030320...hite_Paper.pdf VCT can detect open or shorted or "properly terminated" connections on the pairs in CAT5 cable. The white paper shows electrical waveforms demonstrating various cable failures. To use it, you power off the destination device (so it cannot interfere with the measurements). The Marvell NIC end sends "pings" down the cable, and like a TDR (time domain reflectometer), the Marvell chip looks for reflections coming back. The signal shape determines the status message the VCT test shows as a result. Marvell NIC ---X----------------------------------X---- (Powered Off router, (with VCT) (Put your test cable in place) terminates line) I used that to detect a dirty pin on an RJ45 once. It said "one pair was open", out of the four twisted pairs. If the router itself had a problem (open connection or cold solder joint inside the router), that part of the hardware is in the test path too. Make sure you have enough "reliable, tested" gear to use, before placing a defective item into the circuit. ******* 100BT uses four wires, arranged in two pairs. These are on pins 1,2,3,6. To have GbE operation, all four pairs are used, a total of eight wires and eight pins. If not enough wires are available, because something is broken or dirty, the interface can drop back to 100BT (which means a minimum of two working pairs are required). That could be what you're seeing. You can also "force" NICs to sub-rates. This is a PHY feature. The PHY will "auto-negotiate" the highest available rate, but if you want, you could artifically set the rate to 100BT full duplex or 100BT half duplex just for fun. The setting might well be stored in the registry somewhere. Paul |
#3
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OT LAN speed
On 13/05/2018 01:16, Paul wrote:
Fokke Nauta wrote: Off topic. Hi all, In our home LAN, connected one switch to the other by a 30 m long CAT5E cable. The cable was there already, but I made new connectors to both ends, as the cable was longer than necessary. To my surprise I found at the switch that only 1 LED was blinking, indicating that it was a 100 Mbps connection. All other connectors show 2 LED's, which means it is a Gbps connection. I made a test. From my pc (W10) via a switch to the server (W10): 201/512 Mbps (W/R). From another pc (W7), via the 2 switches and the 30m cable to the server, 73/92 Mbps (W/R). Why is this connection so low? I tried several times to mount new connectors to both ends of that cable, but it did not improve anything. So the cable should be allright. Or should I place a CAT6 cable? Curious as to what peaople here think about this. Fokke Do you have a Marvell NIC on one of your computers, that has the Virtual Cable Tester ? https://web.archive.org/web/20030320...hite_Paper.pdf VCT can detect open or shorted or "properly terminated" connections on the pairs in CAT5 cable. The white paper shows electrical waveforms demonstrating various cable failures. To use it, you power off the destination device (so it cannot interfere with the measurements). The Marvell NIC end sends "pings" down the cable, and like a TDR (time domain reflectometer), the Marvell chip looks for reflections coming back. The signal shape determines the status message the VCT test shows as a result. Marvell NIC ---X----------------------------------X---- (Powered Off router, (with VCT) (Put your test cable in place) terminates line) I used that to detect a dirty pin on an RJ45 once. It said "one pair was open", out of the four twisted pairs. If the router itself had a problem (open connection or cold solder joint inside the router), that part of the hardware is in the test path too. Make sure you have enough "reliable, tested" gear to use, before placing a defective item into the circuit. ******* 100BT uses four wires, arranged in two pairs. These are on pins 1,2,3,6. To have GbE operation, all four pairs are used, a total of eight wires and eight pins. If not enough wires are available, because something is broken or dirty, the interface can drop back to 100BT (which means a minimum of two working pairs are required). That could be what you're seeing. You can also "force" NICs to sub-rates. This is a PHY feature. The PHY will "auto-negotiate" the highest available rate, but if you want, you could artifically set the rate to 100BT full duplex or 100BT half duplex just for fun. The setting might well be stored in the registry somewhere. Paul Thanks, Paul. We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke |
#4
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OT LAN speed
Fokke Nauta wrote:
On 13/05/2018 01:16, Paul wrote: Fokke Nauta wrote: Off topic. Hi all, In our home LAN, connected one switch to the other by a 30 m long CAT5E cable. The cable was there already, but I made new connectors to both ends, as the cable was longer than necessary. To my surprise I found at the switch that only 1 LED was blinking, indicating that it was a 100 Mbps connection. All other connectors show 2 LED's, which means it is a Gbps connection. I made a test. From my pc (W10) via a switch to the server (W10): 201/512 Mbps (W/R). From another pc (W7), via the 2 switches and the 30m cable to the server, 73/92 Mbps (W/R). Why is this connection so low? I tried several times to mount new connectors to both ends of that cable, but it did not improve anything. So the cable should be allright. Or should I place a CAT6 cable? Curious as to what peaople here think about this. Fokke Do you have a Marvell NIC on one of your computers, that has the Virtual Cable Tester ? https://web.archive.org/web/20030320...hite_Paper.pdf VCT can detect open or shorted or "properly terminated" connections on the pairs in CAT5 cable. The white paper shows electrical waveforms demonstrating various cable failures. To use it, you power off the destination device (so it cannot interfere with the measurements). The Marvell NIC end sends "pings" down the cable, and like a TDR (time domain reflectometer), the Marvell chip looks for reflections coming back. The signal shape determines the status message the VCT test shows as a result. Marvell NIC ---X----------------------------------X---- (Powered Off router, (with VCT) (Put your test cable in place) terminates line) I used that to detect a dirty pin on an RJ45 once. It said "one pair was open", out of the four twisted pairs. If the router itself had a problem (open connection or cold solder joint inside the router), that part of the hardware is in the test path too. Make sure you have enough "reliable, tested" gear to use, before placing a defective item into the circuit. ******* 100BT uses four wires, arranged in two pairs. These are on pins 1,2,3,6. To have GbE operation, all four pairs are used, a total of eight wires and eight pins. If not enough wires are available, because something is broken or dirty, the interface can drop back to 100BT (which means a minimum of two working pairs are required). That could be what you're seeing. You can also "force" NICs to sub-rates. This is a PHY feature. The PHY will "auto-negotiate" the highest available rate, but if you want, you could artifically set the rate to 100BT full duplex or 100BT half duplex just for fun. The setting might well be stored in the registry somewhere. Paul Thanks, Paul. We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. |
#5
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OT LAN speed
On Sat, 12 May 2018 20:44:57 +0200, Fokke Nauta
wrote: Off topic. Hi all, In our home LAN, connected one switch to the other by a 30 m long CAT5E cable. The cable was there already, but I made new connectors to both ends, as the cable was longer than necessary. To my surprise I found at the switch that only 1 LED was blinking, indicating that it was a 100 Mbps connection. All other connectors show 2 LED's, which means it is a Gbps connection. I made a test. From my pc (W10) via a switch to the server (W10): 201/512 Mbps (W/R). From another pc (W7), via the 2 switches and the 30m cable to the server, 73/92 Mbps (W/R). Why is this connection so low? I tried several times to mount new connectors to both ends of that cable, but it did not improve anything. So the cable should be allright. Or should I place a CAT6 cable? Curious as to what peaople here think about this. Fokke 1G Ethernet needs all 4 pairs connected. 100M only needs 2 10/100/1000 ports will "try" for 1G by checking all 4 cable pairs work and are connected to another 1G port, and if 1G cannot be supported will fall back to 100M so you may have - a cable which was only only wired for 2 pairs for 100M - a 4 pair cable with 1 wire or pair not connected / damaged. - a device at 1 end that is only 100M As Paul suggested a tester is pretty useful for finding this kind of fault - everything depends on layer 1 and a surprising number of issues in LANs come down to flaky cabling. -- Stephen |
#6
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OT LAN speed
On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX
wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. |
#7
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OT LAN speed
On 13/05/2018 23:20, Stephen wrote:
On Sat, 12 May 2018 20:44:57 +0200, Fokke Nauta wrote: Off topic. Hi all, In our home LAN, connected one switch to the other by a 30 m long CAT5E cable. The cable was there already, but I made new connectors to both ends, as the cable was longer than necessary. To my surprise I found at the switch that only 1 LED was blinking, indicating that it was a 100 Mbps connection. All other connectors show 2 LED's, which means it is a Gbps connection. I made a test. From my pc (W10) via a switch to the server (W10): 201/512 Mbps (W/R). From another pc (W7), via the 2 switches and the 30m cable to the server, 73/92 Mbps (W/R). Why is this connection so low? I tried several times to mount new connectors to both ends of that cable, but it did not improve anything. So the cable should be allright. Or should I place a CAT6 cable? Curious as to what peaople here think about this. Fokke 1G Ethernet needs all 4 pairs connected. 100M only needs 2 It's a CAT5E cable with 4 pairs. 10/100/1000 ports will "try" for 1G by checking all 4 cable pairs work and are connected to another 1G port, and if 1G cannot be supported will fall back to 100M so you may have - a cable which was only only wired for 2 pairs for 100M - a 4 pair cable with 1 wire or pair not connected / damaged. Possible ... - a device at 1 end that is only 100M Both ends are 1 Gbps switches. As Paul suggested a tester is pretty useful for finding this kind of fault - everything depends on layer 1 and a surprising number of issues in LANs come down to flaky cabling. I'll get a cable tester! Fokke |
#8
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OT LAN speed
On 13/05/2018 23:22, Char Jackson wrote:
On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Fokke |
#9
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OT LAN speed
On 14/05/2018 10:13, Fokke Nauta wrote:
On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Fokke What do you think of this one: http://www.solfon.nl/pictures/untitled-1.jpg This tester quickly identifies continuity problems such as shorts, open wires, reversed pairs, crossed pairs and miswiring for 10BASE-T, 100BASE-T, EIA/TIA 568A/568B and Token Ring cables. (I don't see 1000BASE-T here) Moreover, this tester will verify shield integrity for all STP cables. Use the included remote terminator to test installed cables. Features: l Tests continuity of UTP/STP cables l Verifies adherence to 10BASE-T, 100BASE-T, TIA-568A, TIA-568B and Token Ring wiring standards l Verifies shield integrity l Clear and simple LED display l Tests installed cables with included remote identifier Costs: 17 euro. Fokke |
#10
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OT LAN speed
Fokke Nauta wrote:
On 14/05/2018 10:13, Fokke Nauta wrote: On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Fokke What do you think of this one: http://www.solfon.nl/pictures/untitled-1.jpg This tester quickly identifies continuity problems such as shorts, open wires, reversed pairs, crossed pairs and miswiring for 10BASE-T, 100BASE-T, EIA/TIA 568A/568B and Token Ring cables. (I don't see 1000BASE-T here) Moreover, this tester will verify shield integrity for all STP cables. Use the included remote terminator to test installed cables. Features: l Tests continuity of UTP/STP cables l Verifies adherence to 10BASE-T, 100BASE-T, TIA-568A, TIA-568B and Token Ring wiring standards l Verifies shield integrity l Clear and simple LED display l Tests installed cables with included remote identifier Costs: 17 euro. Fokke It looks like a standard cheap tester but they hyped the description and tripled the price. Push button on / off is not recommended. Get one with a slide or rotary switch instead. I have this one: Nothing has gone wrong with it in 8 years of using it: https://www.ebay.com/itm/Multi-Netwo...EAAOSwzXBZfR3J |
#11
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OT LAN speed
On Mon, 14 May 2018 09:21:57 -0500, Paul in Houston TX
wrote: Fokke Nauta wrote: On 14/05/2018 10:13, Fokke Nauta wrote: On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Fokke What do you think of this one: http://www.solfon.nl/pictures/untitled-1.jpg This tester quickly identifies continuity problems such as shorts, open wires, reversed pairs, crossed pairs and miswiring for 10BASE-T, 100BASE-T, EIA/TIA 568A/568B and Token Ring cables. (I don't see 1000BASE-T here) Moreover, this tester will verify shield integrity for all STP cables. Use the included remote terminator to test installed cables. Features: l Tests continuity of UTP/STP cables l Verifies adherence to 10BASE-T, 100BASE-T, TIA-568A, TIA-568B and Token Ring wiring standards l Verifies shield integrity l Clear and simple LED display l Tests installed cables with included remote identifier Costs: 17 euro. Fokke That one looks fine to me. While it doesn't specifically mention Gigabit, it does have indicators for all 4 cable pairs so Fokke should be covered. It looks like a standard cheap tester but they hyped the description and tripled the price. Push button on / off is not recommended. Get one with a slide or rotary switch instead. I have this one: Nothing has gone wrong with it in 8 years of using it: https://www.ebay.com/itm/Multi-Netwo...EAAOSwzXBZfR3J That looks just like mine! It even ships from Hong Kong. I'm not sure what a person gets for 17 Euros that he doesn't get for less than $5, but some peace of mind, perhaps, which could be worth it. Consider the fact that some motherboard makers throw a crude cable tester right into their product, so there probably isn't a whole lot to it. Send a voltage or signal down 'this' wire and expect it to come back on 'that' wire. Opens, shorts, and mismatched pairs are all easy to spot. |
#12
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OT LAN speed
Char Jackson wrote:
On Mon, 14 May 2018 09:21:57 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: On 14/05/2018 10:13, Fokke Nauta wrote: On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Fokke What do you think of this one: http://www.solfon.nl/pictures/untitled-1.jpg This tester quickly identifies continuity problems such as shorts, open wires, reversed pairs, crossed pairs and miswiring for 10BASE-T, 100BASE-T, EIA/TIA 568A/568B and Token Ring cables. (I don't see 1000BASE-T here) Moreover, this tester will verify shield integrity for all STP cables. Use the included remote terminator to test installed cables. Features: l Tests continuity of UTP/STP cables l Verifies adherence to 10BASE-T, 100BASE-T, TIA-568A, TIA-568B and Token Ring wiring standards l Verifies shield integrity l Clear and simple LED display l Tests installed cables with included remote identifier Costs: 17 euro. Fokke That one looks fine to me. While it doesn't specifically mention Gigabit, it does have indicators for all 4 cable pairs so Fokke should be covered. It looks like a standard cheap tester but they hyped the description and tripled the price. Push button on / off is not recommended. Get one with a slide or rotary switch instead. I have this one: Nothing has gone wrong with it in 8 years of using it: https://www.ebay.com/itm/Multi-Netwo...EAAOSwzXBZfR3J That looks just like mine! It even ships from Hong Kong. I'm not sure what a person gets for 17 Euros that he doesn't get for less than $5, but some peace of mind, perhaps, which could be worth it. Consider the fact that some motherboard makers throw a crude cable tester right into their product, so there probably isn't a whole lot to it. Send a voltage or signal down 'this' wire and expect it to come back on 'that' wire. Opens, shorts, and mismatched pairs are all easy to spot. I consider the Marvell implementation (VCT), to be superior, because it's using (homegrown) TDR. And not just an open/short test. It has the ability to determine the line is terminated properly at the other end. It can "see" the characteristic impedance and whether the termination resistor matches the line or not. ---------\||/---------+ /||\ termination \||/ resistor ---------/||\---------+ It can also give a distance indication. Say I have a 100 foot cable. VCT can indicate "open at 70 feet, on pair 1-2". Just as you'd use a TDR tester to find a broken wire and roughly where in the wall the break might be located. If it said "open at 100 feet, all four pairs", then you'd know the wire was unplugged :-) The resolution won't be quite as good as a real TDR, but the scheme should work well enough. You could in that case, cut off the last 35 feet of wire, re-terminate, and put the 65 foot remaining cable back in your stock room for next time. The user still has to interpret "hey, my wire is 100 feet long", to make sense of the results, and whether it indicates the cable is actually broken internally. If the cable is open on all four pairs, at the 100 foot distance, the user has to figure out that it means the connector isn't plugged in. I've had at least one Ethernet cable that suffered "furniture damage", so it happens. Paul |
#13
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Fokke Nauta wrote:
On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Did you have a look on Conrad.nl? They have quite a range of electronics stuff. They're not cheap like the Chinese web shops, but have good specs and documentation which makes a buying decision much easier. My latest purchase was a USB power (V and A) meter. |
#14
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On 14/05/2018 19:56, Frank Slootweg wrote:
Fokke Nauta wrote: On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Did you have a look on Conrad.nl? They have quite a range of electronics stuff. They're not cheap like the Chinese web shops, but have good specs and documentation which makes a buying decision much easier. My latest purchase was a USB power (V and A) meter. Yes, I did. I have an account there. I like especially this one: http://www.solfon.nl/pictures/image.jpg And here are the specs: http://www.solfon.nl/pictures/KABELT...e_en_fr_nl.pdf Price is € 10,74 ex VAT. I'm seriously concidering buying this one. Looks better than the cheap China stuff. Fokke |
#15
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OT LAN speed
On 14/05/2018 16:21, Paul in Houston TX wrote:
Fokke Nauta wrote: On 14/05/2018 10:13, Fokke Nauta wrote: On 13/05/2018 23:22, Char Jackson wrote: On Sun, 13 May 2018 12:45:18 -0500, Paul in Houston TX wrote: Fokke Nauta wrote: We don't have Marvel equipment here. But I looked into cable testers, never thought of that. For about 20 euro's I can have a reasonable UTP cable tester. Gonna try that. Fokke My employer installs and monitors SCADA equipment for customers. We have to make up the CAT5/6 cables. Almost every failure in com was due to improper rj45 install. Sometimes a wire was not in all the way, two wires were swapped, or one wire was slightly off center and thus the conductor did not get pierced. I have several line testers but my most used one is a simple round trip conductivity tester: plug the terminator into one end and the tester into the other end and watch the lights. It was $6 USD from EBay including shipping. It does not have auto shut off though so remove the battery when not in use. +1 I bought a cheap Chinese cable tester in 2009 for $4.95 and free shipping from China. It arrived in 3 days, so it must have been on the fast boat. It still works perfectly and it came with a cool little leather pouch. Thanks. I see a tester of 10 euro and one of 17 euro. Looking for the differences now. I'd rather have a good tester than a cheap one with shortcomings. Fokke What do you think of this one: http://www.solfon.nl/pictures/untitled-1.jpg This tester quickly identifies continuity problems such as shorts, open wires, reversed pairs, crossed pairs and miswiring for 10BASE-T, 100BASE-T, EIA/TIA 568A/568B and Token Ring cables. (I don't see 1000BASE-T here) Moreover, this tester will verify shield integrity for all STP cables. Use the included remote terminator to test installed cables. Features: l Tests continuity of UTP/STP cables l Verifies adherence to 10BASE-T, 100BASE-T, TIA-568A, TIA-568B and Token Ring wiring standards l Verifies shield integrity l Clear and simple LED display l Tests installed cables with included remote identifier Costs: 17 euro. Fokke It looks like a standard cheap tester but they hyped the description and tripled the price. Push button on / off is not recommended. Get one with a slide or rotary switch instead. I have this one: Nothing has gone wrong with it in 8 years of using it: https://www.ebay.com/itm/Multi-Netwo...EAAOSwzXBZfR3J OK, thanks! So this is not the tester I'm gonna get. Seen something else: I like especially this one: http://www.solfon.nl/pictures/image.jpg And here are the specs: http://www.solfon.nl/pictures/KABELT...e_en_fr_nl.pdf Price is € 10,74 ex VAT. I'm seriously concidering buying this one. Fokke |
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