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Fibre speed dropping dramatically

Conversation Starter

My usual download speed was in the 30's. about what I expected due to my distance from the cabinet, but recently it has started dropping.

These are the last two days figures from Thinkbroadband's speed test

25-03-2019 16:31:03 (GMT)5.9 Mbps2.6 MbpsTalkTalk view result
24-03-2019 11:23:19 (GMT)19.7 Mbps3.2 MbpsTalkTalk

this is a serious fall off in service. What's the answer to this?

Community Star

Hi A1, is that a test wired or WiFi?

Any changes in your household? New bits of kit, telephones microwaves?

Has the quality of your landline changed, any noise or crackles?

Have you been frequently restarting your router?


Good news is your post has been flagged for assistance and you should hear during tomorrow. Please check your community profile and add your landline phone number if necessary.


Regards Divsec, I don't work here, know little, and have too many opinions.
Community Team

Hi A1exander


I'm sorry to hear this.


I've completed a line test which hasn't detected any faults and your line is in sync at 34.3mb.


Are you running wired or wireless speed tests?







Conversation Starter

Hi Debbie,

I run wired tests, the last two days I've got around 30 Mbps, but each time it takes the speed tester many seconds before it starts. This mirrors my experience when browsing, even when the download takes place at a reasonable speed I often have to wait long periods to get started.

This makes the overall time longer than 30 Mbps suggests.



Community Team

Hi A1ex


Which router are you using? (make and model)





Conversation Starter

My router is Huawei HG633 from Talktalk

Community Team

Hi A1exander,


Can you please run a set of pings and a set of trace routes, when the connection is slow, to and can you post the results. Can you run the tests on a device connected by Ethernet cable to your router


Conversation Starter

I've carried out the suggested tests, although performance seems a lot better now.



Pinging [] with 32 bytes of data:
Reply from bytes=32 time=21ms TTL=55
Reply from bytes=32 time=21ms TTL=55
Reply from bytes=32 time=21ms TTL=55
Reply from bytes=32 time=21ms TTL=55

Ping statistics for
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 21ms, Maximum = 21ms, Average = 21ms




Tracing route to []
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms
2 * * * Request timed out.
3 14 ms 13 ms 13 ms []
4 13 ms 13 ms 13 ms []
5 21 ms 21 ms 30 ms []
6 21 ms 21 ms 21 ms []
7 * * * Request timed out.
8 19 ms 20 ms 20 ms
9 21 ms 21 ms 20 ms
10 22 ms 21 ms 22 ms
11 21 ms 21 ms 21 ms
12 22 ms 22 ms 21 ms
13 21 ms 21 ms 21 ms
14 21 ms 21 ms 21 ms []

Trace complete.


Also here's the latest speed test from Thinkbroadband




It appears my original problem may have been due to some short term issue with the line.

Community Team

Thanks for running the tests, glad to hear your seeing some improvement. Please let us know if you experience any further problems