This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.TP-Link PA9020P kit giving REDUCED internet speeds after I upgraded from Vivid 200 to Vivid 350!
This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
TP-Link PA9020P kit giving REDUCED internet speeds after I upgraded from Vivid 200 to Vivid 350!
Model :
Hardware Version :
Firmware Version :
ISP :
Hi all,
I've been using a TP-Link TL-PA9020P ethernet powerline adapter kit very successfully with Vivid 200 for many months, always achieving very near to or 200+Mbps internet speed to my Mac Pro, which was great.
However, we have just upgraded to Vivid 350 and my average ethernet Powerline internet speed has actually DECREASED, now never achieving more than 160-170Mbps!
The reported line speed with TP Utility is always c1350Mbps. I realise this is the line speed not the throughput speed, but TP Link have themselves corroborate this with me, that this fast line speed should certainly be able to cope with 350Mbps throughput.
Also using iperf, networking-wise we are seeing c.318Mpbs through the powerline. For internet speeds, when we had Vivid 200 I would regularly get up to 230Mbps through the power line, now we have moved to Vivid 350 it's steadfastly reduced. to c170Mbps
So I contacted TP Link support and reported this rather odd throughput speed decrease via the powerline despite the almost 50% speed increase to the router (confirmed with a test Direct connection and also with a test connection to the spare ethernet socket on Powerline Adapter 1, i.e. the adapter is receiving the full speed also, before is goes through the powerline).
After several days of to'ing and fro'ing with TP-Link support the issue was escalated to their R&D programmers for advice and this is what came back from them:
*************
Sorry for the reply late, I have discussed your issue with our R&D. The communication frequency of Coaxial cable is 5Mhz~42Mhz and the communication frequency of Powerline adapter is 1.8Mhz~68Mhz. So there will be some influence between them, the higher speed of Coaxial cable, the more affected on powerline. So we think your issue may due to this reason.
*************
So they are basically stating that the higher speed Vivid 350 is likely causing more interference than the Vivid 200, to the extent that it has actually reduced the throughout to a LOWER rate than Vivid 200! Wonderful!
Can anybody help to clarify and/or corroborate this claim? i.e. the communication frequency of 200 vs 350 service and affect on powerline adapters?
Virgin Support community state
**************
The frequencies quoted by TPLink sounded very much like old US Docsis specs for the Upstream and are not correct. EuroDocsis ranges from 5Mhz to 1Ghz which maybe transmitted through the coax (actual frequencies will depend on VM). The VM coaxial upstream is in the range 18MHz to 65 MHz (they may be moving that up to 89 MHz iirc). The VM coaxial downstream is in the range 118 MHz to c. 650 MHz. Unless there is crosstalk from the modem side to the router side (which would corrupt all your router data) what they have said is simply incorrect.
****************
It's seems rather disingenuous that TP-link are now stating their PA9020 Powerline Kit, which they advertise as being their FASTEST adapter, actually has an issue with coaxial supply that makes it perform slower as the speed of the coaxial supply increases past a certain point. Highly annoying at best and false advertising at worst (there is no * /Note anywhere stating anything about coaxial connection issues on their PA9020P kit to ward off customers buying it for it's fastest speeds who are using a fast coaxial-based service service).
I'm wondering whether this is a case of an inherent issue between the coaxial internet supply feed and the way the powerline adapters handle it, or is it interference coming from the cable router and/or coaxial cables in close proximity to the powerline adapter? I’m wondering if it’s the latter whether also finding a more shielded coaxial cables would help matters?
Many thanks in advance and apologies for the long message.
Hardware Version :
Firmware Version :
ISP :
Hi all,
I've been using a TP-Link TL-PA9020P ethernet powerline adapter kit very successfully with Vivid 200 for many months, always achieving very near to or 200+Mbps internet speed to my Mac Pro, which was great.
However, we have just upgraded to Vivid 350 and my average ethernet Powerline internet speed has actually DECREASED, now never achieving more than 160-170Mbps!
The reported line speed with TP Utility is always c1350Mbps. I realise this is the line speed not the throughput speed, but TP Link have themselves corroborate this with me, that this fast line speed should certainly be able to cope with 350Mbps throughput.
Also using iperf, networking-wise we are seeing c.318Mpbs through the powerline. For internet speeds, when we had Vivid 200 I would regularly get up to 230Mbps through the power line, now we have moved to Vivid 350 it's steadfastly reduced. to c170Mbps
So I contacted TP Link support and reported this rather odd throughput speed decrease via the powerline despite the almost 50% speed increase to the router (confirmed with a test Direct connection and also with a test connection to the spare ethernet socket on Powerline Adapter 1, i.e. the adapter is receiving the full speed also, before is goes through the powerline).
After several days of to'ing and fro'ing with TP-Link support the issue was escalated to their R&D programmers for advice and this is what came back from them:
*************
Sorry for the reply late, I have discussed your issue with our R&D. The communication frequency of Coaxial cable is 5Mhz~42Mhz and the communication frequency of Powerline adapter is 1.8Mhz~68Mhz. So there will be some influence between them, the higher speed of Coaxial cable, the more affected on powerline. So we think your issue may due to this reason.
*************
So they are basically stating that the higher speed Vivid 350 is likely causing more interference than the Vivid 200, to the extent that it has actually reduced the throughout to a LOWER rate than Vivid 200! Wonderful!
Can anybody help to clarify and/or corroborate this claim? i.e. the communication frequency of 200 vs 350 service and affect on powerline adapters?
Virgin Support community state
**************
The frequencies quoted by TPLink sounded very much like old US Docsis specs for the Upstream and are not correct. EuroDocsis ranges from 5Mhz to 1Ghz which maybe transmitted through the coax (actual frequencies will depend on VM). The VM coaxial upstream is in the range 18MHz to 65 MHz (they may be moving that up to 89 MHz iirc). The VM coaxial downstream is in the range 118 MHz to c. 650 MHz. Unless there is crosstalk from the modem side to the router side (which would corrupt all your router data) what they have said is simply incorrect.
****************
It's seems rather disingenuous that TP-link are now stating their PA9020 Powerline Kit, which they advertise as being their FASTEST adapter, actually has an issue with coaxial supply that makes it perform slower as the speed of the coaxial supply increases past a certain point. Highly annoying at best and false advertising at worst (there is no * /Note anywhere stating anything about coaxial connection issues on their PA9020P kit to ward off customers buying it for it's fastest speeds who are using a fast coaxial-based service service).
I'm wondering whether this is a case of an inherent issue between the coaxial internet supply feed and the way the powerline adapters handle it, or is it interference coming from the cable router and/or coaxial cables in close proximity to the powerline adapter? I’m wondering if it’s the latter whether also finding a more shielded coaxial cables would help matters?
Many thanks in advance and apologies for the long message.
