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Friday, June 9th, 2023 4:13 AM

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Intermittent connectivity. Coax splitter issue?

Several times a day I lose connection for several minutes. The Ethernet light on my Motorola surfboard will flash like data is being sent but all connected devices will say no internet connection. The issue will resolve after several minutes. Sometimes the downstream and upstream lights will turn off, then flash, them become solid again and the issue will resolve but sometimes it will resolve without that happening.

There’s a coax splitter downstairs that’s powered and plugged in. 5 or so cables are connected. Previous owner maybe had cable boxes in each bedroom but I’m only utilizing the one for my modem. Here’s what my modem is reporting:

pstream Connection OK Operational
  
   Boot State OK Operational

  
   Configuration File OK
  
   Security Enabled BPI+
  


   Connection Status    
   System Up Time 1 days 05h:22m:42s  
  
   Network Access Allowed  
  


   Downstream Bonded Channels  
  
   Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
1 Locked QAM256 9 531.0 0.3 39.8 1387 1784
2 Locked QAM256 10 537.0 0.0 39.6 1887 2372
3 Locked QAM256 11 543.0 0.1 39.6 1645 2636
4 Locked QAM256 12 549.0 -0.1 39.5 1778 2271
5 Locked QAM256 13 555.0 -0.3 39.4 1668 2181
6 Locked QAM256 14 561.0 -0.5 39.3 1475 2491
7 Locked QAM256 15 567.0 -0.8 38.9 1630 2300
8 Locked QAM256 16 573.0 -0.4 39.1 1555 2352
9 Locked QAM256 17 579.0 -0.5 39.1 1448 2343
10 Locked QAM256 18 585.0 -0.4 39.0 1540 2249
11 Locked QAM256 19 591.0 -0.6 38.9 1470 2222
12 Locked QAM256 20 597.0 -0.6 38.9 1428 2264
13 Locked QAM256 21 603.0 -0.8 38.7 1242 1885
14 Locked QAM256 22 609.0 -0.7 38.8 1365 1992
15 Locked QAM256 23 615.0 -0.8 38.7 1252 1953
16 Locked QAM256 24 621.0 -1.0 38.6 1220 1528
17 Locked QAM256 25 627.0 -1.2 39.1 1402 2284
18 Locked QAM256 26 633.0 -1.4 39.2 1211 2282
19 Locked QAM256 27 639.0 -1.7 39.2 1285 2135
20 Locked QAM256 28 645.0 -1.8 39.1 1332 2202
21 Locked QAM256 29 651.0 -2.0 38.8 1251 2196
22 Locked QAM256 30 657.0 -2.3 38.8 1217 2058
23 Locked QAM256 31 663.0 -3.0 38.4 1047 2081
24 Locked QAM256 32 669.0 -3.4 38.2 1049 2142
Total             33784 52203


   Upstream Bonded Channels  
  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
1 Locked ATDMA 9 5120 35.6 43.0
2 Locked ATDMA 1 2560 10.4 42.8
3 Locked ATDMA 2 5120 16.4 42.5
4 Locked ATDMA 3 5120 22.8 43.0
5 Locked ATDMA 4 5120 29.2 42.8
6 Not Locked Unknown 0 0 0 0.0
7 Not Locked Unknown 0 0 0 0.0
8 Not Locked Unknown 0 0 0 0.0
 

Does this look to be in spec? Can I eliminate that splitter if it is causing the issue? Any advice is appreciated.

Problem Solver

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1.5K Messages

2 years ago

The amplifier/splitter may be going out or injecting noise.  Signals look reasonable, it's just the errors are ugly.  If don't need the splitter for anything else, try a clean run just to the modem without it for a test.  Take a look at the signals again.  Maybe you really don't need the amp. 

 

Check out the connectors while you're at it.  Try to get away with as few connectors as possible.  Take them apart and shine up that center copper before putting it back together.  It usually does nothing, but it can't hurt if they're older and oxidized.  Here's a guide on what you should be seeing. 

https://forums.xfinity.com/conversations/your-home-network/internet-troubleshooting-tips/602dae4ac5375f08cde52ea0

Official Employee

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2K Messages

2 years ago

@user_fd9f32 Hello! Thank you for reaching out to us here on our Community Forums. It looks like @flatlander3 provided some great information, have you had a chance to look that over? If you are still having issues, please feel free to let us know.

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