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 Jack_in_VAPremium
join:2007-11-26
Mathews, VA
kudos:1 | reply to caribconsult
Re: Got new amp still slow speeds Here in Mathews we have 5 or 6 towers. The one I'm on has a single T-1 but not that many users as it's in the middle of no-where. I really believe that they tie all of them together at a single point and then connect them to the net. Ping times don't make sense. When my tower which is directly between me and Jim_in_Va tower I can hit his and get higher speeds but without a grid antenna the signal is bouncy and my upload suffers greatly. I concluded that if I went to a grid to access his tower then my old tower would give me more grief than I need.
Look at hop 4 and 6. That's what I'm fighting.
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Owner>cd..
C:\Documents and Settings>cd..
C:\>tracert www.speedtest.net
Tracing route to www.speedtest.net [69.17.117.207]
over a maximum of 30 hops:
1 1668 ms 105 ms 106 ms 68.28.249.69
2 132 ms 132 ms 119 ms 68.28.57.92
3 125 ms 126 ms 126 ms 68.28.59.55
4 * * * Request timed out.
5 139 ms 130 ms 133 ms 68.28.63.9
6 * * * Request timed out.
7 130 ms 135 ms 123 ms 68.28.61.69
8 153 ms 126 ms 132 ms sl-gw20-phx-9-0-0.sprintlink.net [144.224.27.29]
9 121 ms 139 ms 126 ms sl-bb20-phx-11-0-0.sprintlink.net [144.232.23.19
7]
10 147 ms 139 ms 193 ms sl-crs2-fw-0-0-0-2.sprintlink.net [144.232.8.72]
11 152 ms 146 ms 159 ms sl-st30-dal-0-12-0-0.sprintlink.net [144.232.20.
252]
12 143 ms 152 ms 152 ms 144.232.24.30
13 164 ms 152 ms 146 ms 4.69.145.115
14 177 ms 174 ms 172 ms ae-2.ebr1.Denver1.Level3.net [4.69.132.105]
15 161 ms 192 ms 172 ms ae-1-100.ebr2.Denver1.Level3.net [4.69.132.38]
16 203 ms 191 ms 184 ms ae-2.ebr2.Seattle1.Level3.net [4.69.132.53]
17 182 ms 186 ms 185 ms ae-22-52.car2.Seattle1.Level3.net [4.68.105.35]
18 184 ms 179 ms 202 ms SPEAKEASY-I.car4.Seattle1.Level3.net [209.247.91
.170]
19 180 ms 186 ms 192 ms 251.ge-1-3-0.sr1.sea5.speakeasy.net [69.17.82.58
]
20 179 ms 192 ms 213 ms www.ookla.com [69.17.117.207]
Trace complete.
C:\>ping www.speedtest.net -n 10
Pinging www.speedtest.net [69.17.117.207] with 32 bytes of data:
Reply from 69.17.117.207: bytes=32 time=184ms TTL=46
Reply from 69.17.117.207: bytes=32 time=185ms TTL=46
Reply from 69.17.117.207: bytes=32 time=182ms TTL=46
Reply from 69.17.117.207: bytes=32 time=182ms TTL=46
Reply from 69.17.117.207: bytes=32 time=191ms TTL=46
Reply from 69.17.117.207: bytes=32 time=186ms TTL=46
Reply from 69.17.117.207: bytes=32 time=179ms TTL=46
Reply from 69.17.117.207: bytes=32 time=176ms TTL=46
Reply from 69.17.117.207: bytes=32 time=182ms TTL=46
Reply from 69.17.117.207: bytes=32 time=184ms TTL=46
Ping statistics for 69.17.117.207:
Packets: Sent = 10, Received = 10, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 176ms, Maximum = 191ms, Average = 183ms
C:\>
C:\> | | |
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Reviews:
 ·AT&T Wireless Br..
1 edit | Jack: You have a CDU680, right? I had that unit and what I found was it had a hard time discriminating between pilots, and would show 3 and even 4 active pilots at any given time. This will just clobber your data transfer rate.
After I switched to the Sierra 598, I found it would lock on one pilot at a time, and overall performance has risen, even though nothing else has changed. I'd guess it's locking out the other tower I was picking up with the amp connected (see previous post in this thread), and it appears that tower was emitting a much dirtier signal than the closer tower, probably due to reflectivity, multipath distortion, trees and terrain in the way, etc. The Sierra basically ignores that signal. I think it has better circuitry in the discriminator section.
Does anyone know more about this issue?
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Sierra 598U/Cradlepoint CTR500, grid antenna, Millenicom, 4 XPPro and 1 Ubuntu units, FireFox everywhere. | |
Jack_in_VAPremium
join:2007-11-26
Mathews, VA
kudos:1 | The pilot selection is strange. My CDU never sees other pilots even as a candidate unless there is a problem developing with my tower. Then I start to get multiple pilots conflicting with my connection effecting my performance. My tower is between me and Jim_in_Va yet I don't see his pilot (495). When my tower goes completely down I then can see it and connect to it although it's so far away that my performance is very iffy and at the same time a bunch of other pilots will override it and eventually knock me offline. So now when I see multiple pilots I know shortly my tower will be down. The last time it went down sprint advanced support checked and said there were multiple towers with a problem. Maybe the way they are linked has a lot to do with the pilots? | |
Reviews:
·AT&T Wireless Br..
| Jack, you've seen Jim's explanation of how towers are configured, I assume. The tower between you and Jim has at least three pilots to cover the entire 360 degree spectrum. When the pilot facing you goes 'down' you might then be picking up the 'backwash' of the one facing Jim (495), which would normally be overpowered by the one facing you if it were working properly. Also, since you are hitting the 495 antenna from the rear, it's likely you are getting a really fractured signal with lots of noise and the accompanying dataflow reductions
I wish I knew more about how these towers connect to the internet backbone. T1 lines are used, sometimes multiple T1 lines but how they interconnect, how they calculate how many T1 lines are needed for the radiated power, and how one tower/pilot affects another is a mystery to me. I never got into that particular aspect of electronics.
Do we have any experts here on this topic?
--
Sierra 598U/Cradlepoint CTR500, grid antenna, Millenicom, 4 XPPro and 1 Ubuntu units, FireFox everywhere. | |
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