Uploads to Box.com Folder Over Dsl Stall

gregbare Premium Member join:2008-05-06 Fort Lauderdale, FL	Premium Fellow member 2009-Mar-27 12:14 pm [Speed Trouble] Uploading SEVERELY Decreases Download Speed. I have AT&T FastAccess Farthermost 6.0 DSL (6mbps down and 512kbps upwardly) Service and use a 2Wire 2701HG-B Gateway. I am routinely able to get 6100kbps up and 425kbps down. If I am uploading a file, my download speed drops dramatically. For example: I am uploading a 10mb attachment to g-mail and I run the same speed test and I get 404kbps down and 405kbps up. Keep in mind, immediately before the upload, I was getting 6100kbps down. Every bit soon as the upload is complete I am able to get the 6100kbps down. Keep in mind, whether the upload is FTP, SSH or through a web browser the consequence is the same. If this were just affecting the speed exam I wouldn't care, but it is crippling my power to fifty-fifty view web pages. I wait that some decrease in download speed volition occur during an upload, but a 5600kbps drop (for a 20kbps upload) is too loftier. The speed reduction is non limited to one machine, I take run the download exam on a different machine than the ane doing the upload and gotten the same results. I am not a noob to DSL/Cable and I accept never seen this problem before, even with AT&T (which I accept been using for most a year now). In the by I take used Lease, Comcast, Telocity, DirecTV DSL, Covad and Speakeasy. Any help would be profoundly appreciated. Give thanks yous!
	· deportment · 2009-Mar-27 12:14 pm · (locked)

graysonf MVM join:1999-07-sixteen Fort Lauderdale, FL	Absolutely naught new about this effect. It is simply a normal office of the TCP/IP protocol. What is happening is that when you download, y'all also must upload TCP/IP ACK packets to the download source to tell it to ship the next set of packets in your download. If in that location is any delay in the ACKs arriving at the download source, your download stalls and appears to crawl. The reason this happens is that when you are uploading at the same fourth dimension every bit you are downloading, the outgoing ACKs are competing with the other upload data in the stream. The solution is to prioritize the sending of outbound ACKs in your TCP/IP stack. This isn't possible in many stacks, such as native Windows. It'due south petty in all *nix stacks and some routers. You can get-go reading up more near this on sites like this: »lartc.org/wondershaper/
	· actions · 2009-Mar-27 12:25 pm · (locked)
Airwolf7 Premium Member bring together:2004-12-12 Franklin, KY 2 edits	Airwolf7 Premium Member 2009-Mar-27 12:43 pm (sarcasm) It's a shame that most all the modems/routers BellSouth and AT&T Southeast take been supplying for about the last iv to 5 years didn't take Texas Instruments AR7 chips in them. If they did then they could just enable the Texas Instruments' TurboDSL™ Parcel Accelerator in the firmware. That sure would have been awful white of them to exercise if they could take done that. (/sarcasm)
	· actions · 2009-Mar-27 12:43 pm · (locked)
	to graysonf the original poster has no concept of how residential DSL works. Asyncronous DSL is half duplex, similar a CB radio. Yous tin either hear or talk, but not both at the aforementioned fourth dimension. You lot have 1 pair of copper (2 wires) going to the DSL modem. one wire is positive, the other is negative. the DSL modem can either receive packets or ship packets, but not both at the same time due to the fashion electricy flows on wires. And so, thousands of times a second the modem will tin can from sending to receiving packets. So when you are using all of your upload bandwidth, there's little to no available fourth dimension to switch to download mode of packets on the wire. If you want full duplex (can download and upload at the same time) get Synchronous DSL (i'm not sure AT&T offers this, fifty-fifty for business customers) or get a T-1 (which uses 2 pairs (4 wires) so that 2 wires tin can download packets and 2 wires upload packets at the same time. That's why t-1's cost more however, because you are using 2 circuits, more bandwidth, and 99%+ uptime guarentees.
	· deportment · 2009-Mar-27 1:08 pm · (locked)
graysonf MVM join:1999-07-16 Fort Lauderdale, FL	to Airwolf7 My solution: span to a router that can practice it. Been doing information technology for 10 years. And it's not across the reach of anyone else either. The hardware I run it on is stuff others threw away on the trash pile that can't be used for anything else.
	· actions · 2009-Mar-27 1:19 pm · (locked)
graysonf	to Squeezer It's you who has no concept. You should take read up on TCP ACKs before posting.
	· actions · 2009-Mar-27 1:20 pm · (locked)
	to Squeezer No.
	· actions · 2009-Mar-27 1:32 pm · (locked)
	to graysonf Then how come T-1'south incur no loss in download speeds when yous are uploading data? it's considering T-one's are full duplex! ADSL is half duplex.
	· deportment · 2009-Mar-27 2:49 pm · (locked)
graysonf MVM join:1999-07-16 Fort Lauderdale, FL	I have been on this site for over 10 years and have made thousands of posts and read many, many times more than that. Your explanation is the near technically flawed I have ever read hither.
	· actions · 2009-Mar-27 2:52 pm · (locked)
Splitpair Premium Member join:2000-07-29 Moo-cow Towne	to Squeezer said by Squeezer: You take 1 pair of copper (2 wires) going to the DSL modem. 1 wire is positive, the other is negative. the DSL modem can either receive packets or send packets, but not both at the same time due to the style electricy flows on wires. That is without a doubt, so incorrect it isn't even funny. Not to be insulting but you are clueless as to how ADSL nor less the "A" in ADSL works. Wayne
	· actions · 2009-Mar-27 half-dozen:35 pm · (locked)
Splitpair two edits	to Squeezer said past Squeezer: Then how come T-ane's incur no loss in download speeds when you are uploading data? it's because T-ane's are full duplex! ADSL is one-half duplex. Incorrect, totally incorrect. T1'due south do incur a loss in download speed on upload but it is less noticeable due to the fact a T1 is symmetrical pipe that is to say it's upload speed is the aforementioned as it's download speed. Both ADSL and T1/DS1 service are full duplex, we in the Telecom concern figured out to exercise that transmit and receive at the same time on a unmarried pair voodoo a long time ago. Wayne
	· deportment · 2009-Mar-27 six:40 pm · (locked)
wolfox Gentle Wolfox join:2002-11-27 Dunnellon, FL	wolfox Member 2009-Mar-27 7:20 pm I wonder how our friend volition explicate how having ane wire in the pair out will kill the voice and dialtone however - ADSL nonetheless flows happily over the wire? Had that happen at my erstwhile digs. Vocalisation was for shizzle, DSL trucked on happily. A high resistance open from corrosion is what did me in.
	· actions · 2009-Mar-27 7:20 pm · (locked)
	to Splitpair Well that and if you lot're not using TCP, you can't accept a TCP ACK request. AFAIK at least.
	· actions · 2009-Mar-27 10:20 pm · (locked)
	to gregbare 1 thing.. does AT&T SE utilise HDSL T1s or old skool T1s? If its an HDSL T1, and so physically from a transport media standpoint, ADSL and "T1" are identical (local copper loop)
	· actions · 2009-Mar-28 iii:25 am · (locked)