dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
936
share rss forum feed

bemis

join:2008-07-18
Reading, MA
Reviews:
·Comcast

[Connectivity] SB6121 intermittent connectivity issue

Sat 12/1 @ 15:01 lost connection with "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out"

Sat 12/1 @ 15:05 Connection restored

Mon 12/3 @ 03:48 a few errors appear--
SYNC Timing Synchronization failure
Lost MDD Timeout
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out

Mon 12/3 @ 04:15 Connection restored

I can believe the 4AM connection loss is due to maintenance, but I have a feeling the 3PM one is not.

My question is whether I may have a signal issue or not--

Downstream--
Channel ID: 115 113 114 116
Frequency:
693000000 Hz
681000000 Hz
687000000 Hz
699000000 Hz
Signal to Noise Ratio: 38 dB 38 dB 38 dB 38 dB
Downstream Modulation: QAM256 QAM256 QAM256 QAM256
Power Level: 8 dBmV 8 dBmV 8 dBmV 8 dBmV

Upstream:
Channel ID: 4 5
Frequency:
30100000 Hz
36500000 Hz
Ranging Service ID: 357 357
Symbol Rate: 5.120 Msym/sec 5.120 Msym/sec
Power Level: 45 dBmV 45 dBmV
Upstream Modulation:
[3] QPSK
[3] 64QAM
[3] QPSK
[3] 64QAM

Ranging Status: Success

Model Name: SB6121
Vendor Name: Motorola
Firmware Name: SB_KOMODO-1.0.6.8-SCM01-NOSH
Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3
Hardware Version: 5.0
Firmware Build Time: Aug 30 2012 15:35:46



grcore
Challenge Accepted

join:2003-12-06
usa
Reviews:
·AT&T U-Verse
·Comcast

Signals look ok, though the downstream power level is a little on the high side.

I had experienced a lot of disconnect issues with the 6120 modem. Comcast said it was to be fixed with a firmware update, but I was on 1.0.6.6, and looks like you have the update.

Ended up switching back to my trusty 5120 and its been solid since.


bemis

join:2008-07-18
Reading, MA
Reviews:
·Comcast

said by grcore:

Signals look ok, though the downstream power level is a little on the high side.

Thanks for looking--nothing that I can do improve the signal, I am a HSI only customer. There is exactly 10' of uninterrupted (and only 6 months old) RG6QS between the exterior ground block and my modem--no splitters or other signal interruptions.

When the tech performed my install I asked him to replace the drop from the pole to house because it had been unused and disconnected for longer than I owed the home. The ends and cable itself were pretty crusty, but he claimed they were fine.

I haven't had any issues until this past Saturday... I don't know how often that log resets, but I was surprised to see my interruption from Saturday on there--so if the log is persistent for many days then basically I just happened to be using the internet at the two moments when it failed me (3PM and 4AM lol)

said by grcore:

I had experienced a lot of disconnect issues with the 6120 modem. Comcast said it was to be fixed with a firmware update, but I was on 1.0.6.6, and looks like you have the update.

Ended up switching back to my trusty 5120 and its been solid since

.

This is all I've got, and I own it... so hopefully it will not come down to replacement. My alternative is FIOS which is faster, but also nearly 2X the price. I am paying $44.99 on promo with Comcast for 12/2 service and I'd be paying $74.99 for 15/5 with FIOS.


grcore
Challenge Accepted

join:2003-12-06
usa
reply to bemis

I dont think the problem is with signal levels, more than likely CTMS issues. Unless a signal the problem is intermittent, those are tough to ID.